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Top 100 Digital Security Companies in the UK | 2026

Lily Ruaah,
 26 June 2026

UK digital security companies have raised £9.64b in equity to date, with funding peaking at £1.78b in 2021 before settling into a steadier annual rhythm of around £700m to £800m. Just under two-thirds of all the capital these companies have raised (65%) has arrived since the start of 2020, as cyber threats, identity fraud, and data-protection rules pushed security spending up the corporate agenda.

We’ve ranked the top 100 digital security companies by total equity raised (all data sourced from the Beauhurst platform).

An overview of the digital security sector

Digital security covers companies building the tools that protect data, identities, transactions, and infrastructure from misuse — spanning cybersecurity threat detection, identity verification and fraud prevention, encryption and post-quantum cryptography, regulatory compliance software, and the managed services that keep it all running. In practice the UK sector splits into a few distinct camps: identity and anti-fraud platforms, core cyber-defence and threat-detection tools, crypto and blockchain security, and a long tail of IT-support and consultancy firms for whom security is one service among many. The classification overlaps heavily with application software, payment processing, and risk and compliance.

There are around 6,500 active digital security companies in the UK, a figure that has grown 114% over the past decade from roughly 3,000 at the end of 2015 — slower than newer sectors, reflecting a market that was already well-established a decade ago. Together they report £130b in turnover and employ an estimated 586,000 people, though those totals are inflated by large incumbents such as BT. The £9.64b raised makes this one of the smaller sectors by equity, and company formation has actually cooled in recent years, suggesting consolidation rather than a fresh wave of startups.

Key findings

  • The sector is led by BT, the telecoms incumbent, which has raised £1.00b — though security is only one strand of a sprawling business, and the figure reflects BT’s scale rather than a pure-play security raise. That total represents 10.4% of all the equity raised across the sector, a relatively low share for a number-one company that underlines how broadly capital is spread. BT’s presence at the top, alongside other diversified incumbents, is itself a feature of a sector where security is often a division rather than a whole company.
  • The top five span the sector’s range: behind BT sit OneTrust (£699m, privacy and risk management software), GB Group (£568m, identity verification and fraud prevention), Quantexa (£374m, AI-driven data and risk analysis), and Copper (£238m, digital-asset custody and security). Between them the top five have raised £2.88b, or 30% of the sector total, and the top 100 together account for £7.30b — roughly 76% of all digital-security equity, a fairly concentrated profile.
  • Geographically, London dominates with 54 of the top 100, but the standout is the North West, which takes second place with 13 companies — ahead of the South East’s 12 — an unusually strong showing for a region that rarely features so prominently in tech rankings, with PortSwigger, Red Sift, Cado Security, and Netacea among its security names. The remaining entries are spread across 12 regions in total, reaching both halves of Scotland, Wales, Northern Ireland, and the Midlands.
  • By stage of evolution the top 100 is notable for how many companies have already been acquired: 11 are classified as exited, the highest of any sector Beauhurst tracks, alongside 44 growth-stage and 22 venture-stage businesses. Across the wider staged universe of 1,157 companies the distribution is unusually even — 28% established, 26% seed-stage, 23% venture-stage — and the exit rate of 6.0% is the highest of any sector, marking digital security as an M&A machine where successful companies are reliably bought rather than scaled to independence.

Methodology

To produce this list, we identified all companies that are:
  • Headquartered in the UK
  • Operating in the ‘Digital security’ Beauhurst industry classification
  • Listed as ‘Active’ on Companies House

We’ve then ranked these companies by total equity raised.

To access the data behind this article, and to discover thousands of other ambitious companies, you’ll need to be a Beauhurst subscriber.

All data is correct as of 23 June 2026.

Top 100 digital security companies in the UK

10.

Total amount raised: £185m
Total equity rounds: 5
Established: 2014
Location: Oxford

Oxa develops software designed to power driverless vehicles, with technology that uses features such as cameras and lasers in order to sense and navigate the surrounding environment. In 2023, the UK government announced that Oxa had been included in their Advanced Manufacturing Plan, setting out £150m of investment to supercharge the self-driving vehicle sector. They have received £185m to date through five rounds of fundraising, including £113m in December 2022, aimed at selling its software to a wider range of industries and growing worldwide.

9. Callsign

Total amount raised: £215m
Total equity rounds: 5
Established: 2010
Location: City of London

Focusing on creating smooth customer interactions, AI company Callsign has produced technology for passive authentication, fraud prevention, and intelligence. Its proprietary technology uses artificial intelligence to mimic how humans recognise each other. In October 2021, Visa choseCallsign as their preferred behavioural biometric and device intelligence identity partner across Europe. Callsign is the world’s fastest-growing behavioural authentication and intelligence company. It has raised a total of £215m in investment, across five funding rounds. The company’s main investors include JP Morgan, AllegisCyber, and NightDragon Security.

8. Lendable

Total amount raised: £216m
Total equity rounds: 7
Established: 2014
Location: Hackney

Lendable is a fintech company developing a peer-to-peer lending platform for consumer finance. The company’s AI software matches users with appropriate investors, leveraging artificial intelligence and automated underwriting to quickly approve loans. Lendable also offers loans to those with lower credit scores to provide a fairer borrowing solution. Lendable has raised £216m, across seven funding rounds, since 2014. It’s expanded to offices in New York, Nairobi, and Singapore, and has featured in several high growth lists: 2022’s FT 1000, the Deloitte Fast 50 in both 2019 and 2020, and the Fast Tech Track 100, also in 2019 and 2020. Additionally, in 2018, Lendable participated in Addleshaw Goddard’s AG Elevate accelerator programme for scaling fintech startups.

7. Huma

Total amount raised: £236m
Total equity rounds: 10
Established: 2011
Location: Westminster

​​Huma (previously Medopad) is developing a web-based portal for hospitals and healthcare professionals to contain, manage, and collect health records. This data is then accessible to patients through a mobile app. Alongside its main goal of managing healthcare data, Huma also works on digital health insights and has developed wearable technology to detect digital biomarkers and assess health in real-time. Huma has been working with many organisations around the world, including the NHS, to monitor COVID-19 patients remotely. The AI company has secured £236m in fundraisings, from investors including Healthbox, Nexus Investments, Bayer, and NWS Holdings. In 2020, the company acquired two businesses: stress and productivity biometric startup BioBeats, and Tarilian, an optoelectronic sensor company that makes technology for measuring blood pressure and heart monitoring. They have since acquired Alcedis, developers of a platform for the digitisation of clinical trials that can be integrated with third-party systems, and iPLATO, developers of an app that improves patients’ access to GP practices through an online booking system, and provides a platform for healthcare campaigns.

6. Patsnap

Total amount raised: £251m
Total equity rounds: 4
Established: 2007
Location: Southwark

Patsnap has created a web-based platform to help clients assess intellectual property patents, with access to patent expiry dates, licensing, renewal, and legal information for tech companies. The lawtech company’s platform is powered by artificial intelligence algorithms and natural language processing, to parse patents and IP, as well as extract and cross-match critical information. It can even analyse more complex documents, like clinical trials, chemical structures patents, and litigation records. Patsnap has over 10k customers in over 50 countries, including big names like Tesla, Dyson, and NASA. So far, the company has secured £251m in investment, across four funding rounds.

5. Quantexa

Total amount raised: £286m
Total equity rounds: 6
Established: 2016
Location: Lambeth

Quantexa is a cybersecurity firm that develops AI technology to secure organisations’ data and flag illegal activity. It works closely with industries that handle large datasets (such as banking, e-commerce, and the public sector), to create analytical models that uncover data risk, reveal opportunities, and enhance decision making. The company is backed by AlbionVC, Dawn Capital, HSBC Enterprise Fund, and Accenture, among others. In its latest funding round, Quantexa raised £104m in investment. This took the company’s total fundraisings to £286m. Quantexa has attended both the Microsoft ScaleUp accelerator and Tech Nation’s Future Fifty accelerator. It has also appeared on several high-growth lists, including The Telegraph’s Tech Hot 100, Fast Track’s Tech Track 100, InsurTech 100, and the 2021 edition of The Regtech 100.

4. Gousto

Total amount raised: £321m
Total equity rounds: 14
Established: 2012
Location: Shepherds Bush

Gousto is a meal kit delivery service that provides exact ingredients and portions to customers with instructions on how to prepare the dish. The food tech unicorn, backed by celebrity fitness coach, Joe Wicks, and Japanese investment giant SoftBank, is powered by AI, a technology used since its founding. They have received £321m in funding to date, through 14 rounds of funding. The most recent of these was in February 2023, which saw £50m invested to support them during times of economic uncertainty. Their post-money valuation was listed as £239m. They have been named on a number of high-growth lists, including the FT 1000, Fast Track Tech Track 100, and Top 100 – Britain’s Fastest Growing Businesses. They also attended the Future Fifty accelerator in 2017.

3. Cera

Total amount raised: £366m
Total equity rounds: 9
Established: 2015
Location: Islington

Cera provides homecare, telehealth consultations, and prescription services, which can be managed through a mobile app, which also allows users to book appointments with nurses on demand. To date, they have secured £366m through nine rounds of fundraising. In August 2022, they raised £81.3m to invest in increasing their capacity to help more patients, a project that was invested into by 8090 Partners, Evolve Healthcare Partners, Guinness Ventures, and Jane Street, amongst others. They have attended DigitalHealth.London Accelerator, PwC Scale Programmes, and Govstart.

2. Thought Machine

Total amount raised: £392m
Total equity rounds: 8
Established: 2011
Location: Islington

Thought Machine develops fintech software Vault, which enables banks and financial services providers to centrally manage a range of products. Its core banking platforms can be used to run day-to-day operations, improving the cost, speed, and adaptability of legacy systems. Thought Machine’s software is accessed through an API and has a large artificial intelligence component. The AI company has raised £398m in growth capital so far, across seven funding rounds, with the likes of Molten Ventures (previously Draper Esprit), IQ Capital, Playfair Capital, and British Patient Capital. Its most recent fundraising, secured in July 2020, saw the company valued at £221m pre-money. Alongside new investors ING Ventures, JP Morgan Chase Strategic Investments, and Standard Charter Investments, this latest raise also saw Thought Machine reach unicorn status.

1. Graphcore

Total amount raised: £528m
Total equity rounds: 9
Established: 2016
Location: City of Bristol

Graphcore operates in the semiconductor processing chip industry, developing and manufacturing chips made specifically to accelerate artificial intelligence and machine learning tasks. Graphcore’s chips use Intelligence Process Unit (IPU) technology, housing 1,472 separate IPU-Cores, capable of executing 8,832 separate parallel computing threads. The Bristol-based AI startup has grown from strength to strength since 2016, with a total of nine funding rounds under its belt, which saw it reach unicorn status after just four years of trading. Graphcore has raised more than half a billion pounds in investment, and is partnered with large tech companies such as Microsoft and Dell Technologies. The company has offices in London, Cambridge, Oslo, Beijing, Seoul, and across the US.
Last Updated: 17 July 2026
# Company Region Stage Employees Total Raised
1 BT London Established >1000 £1,000,000,000

BT

BT operates a telecommunications company.

https://www.bt.com/
Industries Application software Customer support Electronics hardware Mobile, internet and wireless hardware Security and surveillance Technology consultancy and IT and telecommunications support Telecommunication infrastructure Telecommunication utilities Video content (including pre- and post-production)
2 OneTrust London Dead >1000 £699,031,822

OneTrust

OneTrust develops software designed to help users manage their security, privacy and third-party risk.

https://www.onetrust.com/
Industries Application software Risk and compliance Security and surveillance
3 GB Group North West Established >1000 £567,984,006

GB Group

GB Group operates identity verification and fraud prevention solutions, providing digital access to opportunities for genuine people and businesses.

https://www.gbgplc.com/
Industries Application software Customer support Data provision and analysis Risk and compliance Robots and automation Security and surveillance Technology consultancy and IT and telecommunications support
4 Quantexa London Established 500-999 £373,779,425

Quantexa

Quantexa develops a software platform which aims to utilise AI to provide services such as data management and risk analysis.

https://www.quantexa.com/
Industries Application software Data management Data provision and analysis Risk and compliance Security and surveillance
5 Copper London Growth 250-499 £237,842,769

Copper

Copper develops a software platform, which provides custody and portfolio management services for digital assets and investments.

https://copper.co/
Industries Application software Security and surveillance
6 Exohood Labs London Venture 5-9 £231,700,000

Exohood Labs

Exohood Labs provides scientific and technological research and development services.

https://exohood.com/
Industries Application software Data provision and analysis Robots and automation Security and surveillance
7 Callsign London Growth 100-249 £215,431,132

Callsign

Callsign develops software that combines biometric, device and location data for authentication purposes, with the aim of improving efficiency and security of financial transactions.

https://www.callsign.com/
Industries Application software Data management Security and surveillance
8 Onfido London Exited 500-999 £176,416,693

Onfido

Onfido develops software designed to verify a customer's identity by assessing the legitimacy of their government ID and facial recognition technology.

https://onfido.com/
Industries Application software Security and surveillance
9 Darktrace East of England Established >1000 £172,783,629

Darktrace

Darktrace develops a cybersecurity software platform.

https://www.darktrace.com/
Industries Application software Customer support Data management Security and surveillance Technology consultancy and IT and telecommunications support Tutoring, training, coaching and skills development
10 Elliptic London Growth 100-249 £168,759,249

Elliptic

Elliptic develops anti-money laundering compliance software which uses blockchain analytics to guard against financial, crypto-currency enabled crime.

https://www.elliptic.co/
Industries Application software Banking Data aggregation Data provision and analysis Risk and compliance Security and surveillance
11 Immersive Labs South West Established 250-499 £161,988,910

Immersive Labs

Immersive Labs provides online training services for businesses, focusing on gamification to teach cyber security.

https://www.immersivelabs.com/
Industries Application software Human resources Security and surveillance Tutoring, training, coaching and skills development
12 Radiant London Growth 100-249 £143,918,860

Radiant

Radiant develops cloud-based AI software including GPU Instances, Serverless Kubernetes and Inference Endpoints.

https://radiant.co/
Industries Application software Data management Data provision and analysis Security and surveillance Technology consultancy and IT and telecommunications support Telecommunication infrastructure
13 Paymentology London Growth 250-499 £134,235,969

Paymentology

Paymentology develops a payment authorisation system that is designed to secure and flexible.

https://www.paymentology.com/
Industries Application software Payment processing Security and surveillance
14 Privitar London Exited 100-249 £122,182,237

Privitar

Privitar creates software that allows the mining of sensitive data sets by preserving the privacy of the underlying individuals.

https://www.privitar.com/
Industries Application software Data provision and analysis
15 Featurespace London Established 250-499 £115,745,430

Featurespace

Featurespace develops software which uses machine learning to analyse customer activity, aiming to predict future individual behaviour. It also aims to prevent and intercept online fraud and optimise marketing conversions in real time.

https://www.featurespace.com/
Industries Application software Budgeting and financial management Data provision and analysis Security and surveillance
16 Envelop Risk South West Growth 50-99 £100,948,069

Envelop Risk

Envelop Risk provides risk management and underwriting services.

https://www.enveloprisk.com/
Industries Insurance Risk and compliance
17 Netcraft London Established 100-249 £99,831,150

Netcraft

Netcraft provides cybersecurity services and other online services such as data mining.

https://www.netcraft.com/
Industries Application software Data aggregation Data provision and analysis Security and surveillance
18 Cloudsmith Northern Ireland Growth 100-249 £93,561,756

Cloudsmith

Cloudsmith develops pipeline management software for developers.

https://cloudsmith.com/
Industries Application software Data provision and analysis Security and surveillance Supply chain management Technology consultancy and IT and telecommunications support
19 Gravitee.io London Growth 100-249 £92,374,901

Gravitee.io

Gravitee.io develops an open source API platform.

http://www.gravitee.io/
Industries Application software
20 PortSwigger North West Established 100-249 £88,610,502

PortSwigger

PortSwigger develops software to test the security and safety of web applications, and also provides web security training.

https://portswigger.net/
Industries Application software Security and surveillance Tutoring, training, coaching and skills development
21 AscendX London Venture 5-9 £85,380,459

AscendX

AscendX develops cloud software applications for manufacturing, healthcare, financial, and consumer & retail sectors.

https://ascendx.cloud/
Industries Application software Assistants, secretaries and administrative support Data management Data provision and analysis Human resources Lead generation and sales support Risk and compliance Robots and automation Technology consultancy and IT and telecommunications support
22 floLIVE London Growth 100-249 £75,529,323

floLIVE

floLIVE develops cloud based software for businesses in the chipset manufacturing and IoT industries, including a billing tool and an identity management system.

https://flolive.net/
Industries Application software Data management Security and surveillance
23 Nasstar Group Yorkshire and The Humber Dead 500-999 £65,729,377

Nasstar Group

Nasstar Group provides managed IT services, including cloud optimisation, website hosting, digital security and technology consultancy.

https://www.nasstar.com/
Industries Data management Data provision and analysis Risk and compliance Security and surveillance Technology consultancy and IT and telecommunications support Telecommunication utilities Website hosting
24 Glasswall London Growth 100-249 £65,545,892

Glasswall

Glasswall develops cybersecurity software which aims to protect clients from attacks through the documents and files they use.

https://www.glasswall.com/
Industries Application software Security and surveillance
25 iProov London Growth 100-249 £63,992,444

iProov

iProov develops biometric technology and software that is designed to improve user authentication using mainly face verification.

https://www.iproov.com/
Industries Application software Security and surveillance
26 Digital Shadows London Exited 100-249 £58,958,456

Digital Shadows

Digital Shadows has developed a suite of online security tools to protect users of social media and cloud technology.

https://www.digitalshadows.com/
Industries Security and surveillance Social media
27 Cutover North West Growth 100-249 £56,070,844

Cutover

Cutover develops runbook automation and recovery software aimed at improving the integration of human and machine workflows.

https://www.cutover.com/
Industries Application software Data provision and analysis Management and strategy consultancy Risk and compliance Robots and automation Security and surveillance
28 Hack The Box London Growth 100-249 £55,965,417

Hack The Box

Hack The Box develops a cybersecurity up-skilling platform, that allows users to improve their digital penetration skills by taking part in a range of online hacking challenges and games.

https://www.hackthebox.com/
Industries Application software Security and surveillance Tutoring, training, coaching and skills development Video games
29 Red Sift North West Growth 100-249 £55,683,745

Red Sift

Red Sift develops a digital security platform which aims to provide businesses with protection against digital attacks.

https://redsift.com/
Industries Application software Security and surveillance
30 Garrison London Exited 100-249 £54,745,431

Garrison

Garrison develops hardware-enforced cyber security technology, aiming to improve security for browsing, data sharing and desktop virtualisation.

https://www.garrison.com/
Industries Application software Electronics hardware Mobile, internet and wireless hardware Security and surveillance
31 Optalysys Yorkshire and The Humber Growth 50-99 £54,157,433

Optalysys

Optalysys develops optical processors with applications in big data, supercomputing and data security, making use of lasers and gel-filled cells to encode and analyse large amounts of data.

https://optalysys.com/
Industries Chips and processors Data provision and analysis Electronics hardware
32 Banked London Growth 50-99 £51,967,134

Banked

Banked develops software aimed at providing customers with a secure web portal for accessing sensitive data services such as banking accounts.

https://banked.com/
Industries Application software Banking Security and surveillance
33 Mimecast London Established >1000 £51,300,994

Mimecast

Mimecast has developed web-based software for managing emails.

http://www.mimecast.com/
Industries Application software Assistants, secretaries and administrative support Human resources Security and surveillance
34 PQShield South East Growth 50-99 £50,362,016

PQShield

PQShield develops cybersecurity technology using post-quantum algorithms.

https://pqshield.com/
Industries Application software Chips and processors Electronics hardware Embedded systems Security and surveillance Technology consultancy and IT and telecommunications support Telecommunication utilities
35 Panaseer South East Growth 100-249 £50,253,772

Panaseer

Panaseer has developed software to assist businesses analyzing the security of their data.

https://panaseer.com/
Industries Application software Data management Security and surveillance
36 CloudClevr West Midlands Venture 100-249 £50,000,000

CloudClevr

CloudClevr provides IT and communication support services, which aim to help small and medium sized businesses transition over to cloud-based technologies.

https://cloudclevr.com/
Industries Application software Security and surveillance Technology consultancy and IT and telecommunications support
37 Adarga South East Growth 50-99 £48,390,390

Adarga

Adarga develops data analytics software for the defence and commercial sectors.

https://adarga.ai/
Industries Application software Data provision and analysis Insurance Military and defence Security and surveillance
38 Gama Aviation South East Established >1000 £48,000,000

Gama Aviation

Gama Aviation provides business aviation, special mission, and technology services.

http://gamaaviation.com/
Industries Aircraft Airports Application software Data provision and analysis Electronics hardware Emergency services Health and safety Military and defence Oil and gas Passenger airlines Repair, maintenance and servicing Security and surveillance Supply chain management Tutoring, training, coaching and skills development
39 Mind Foundry South East Growth 50-99 £45,119,919

Mind Foundry

Mind Foundry develops and deploys artificial intelligence solutions for the security and defence industries.

https://www.mindfoundry.ai/
Industries Application software Data provision and analysis Electronics hardware Military and defence Robots and automation Security and surveillance Sensors
40 Kigen East of England Growth 100-249 £39,242,075

Kigen

Kigen provides eSIM IoT and iSIM security technology and services.

https://kigen.com/
Industries Application software Mobile, internet and wireless hardware Security and surveillance
41 MyPinPad Wales Established 50-99 £38,922,457

MyPinPad

MyPinPad develops mobile payment software that allows banks and businesses to securely verify customer identity and accept payments using smartphones and tablets.

https://mypinpad.com/
Industries Application software Electronics hardware Mobile, internet and wireless hardware Payment processing Security and surveillance Server software
42 Egress Software Technologies London Established 250-499 £36,975,376

Egress Software Technologies

Egress Software Technologies has developed a range of software that allows public and private sector organisations to store and send their data securely.

https://www.egress.com/
Industries Application software Customer support Data management Data provision and analysis Security and surveillance Technology consultancy and IT and telecommunications support
43 Element London Growth 100-249 £36,080,626

Element

Element creates web-based software that is designed to allow for more fluid communication between networks of colleagues and Matrix , an open source network.

https://element.io/
Industries Application software Human resources
44 Quantum Group London Growth 50-99 £34,308,181

Quantum Group

Quantum Group operates a fintech investment incubator that owns several companies. One is Volopa, a banking platform offering money exchange, transfer and prepaid card services, and Valkyrie, a digital security consultancy.

https://quantumgroup.uk/
Industries Application software Banking Security and surveillance
45 ip.access East of England Exited 10-24 £33,946,349

ip.access

ip.access develops and manufactures picocells – small cellular base stations typically used to extend coverage to indoor areas where outdoor signals do not reach well, or to add network capacity in areas with very dense phone usage, such as train stations.

http://www.ipaccess.com/
Industries Application software Data provision and analysis Electronics hardware Manufacturing Mobile, internet and wireless hardware Security and surveillance Sensors Telecommunication infrastructure
46 CybSafe London Growth 50-99 £32,368,395

CybSafe

CybSafe develops web-based cyber security and assessment software.

https://www.cybsafe.com/
Industries Data provision and analysis Security and surveillance
47 Avecto North West Exited 100-249 £32,000,000

Avecto

Avecto designs software for businesses to secure their IT systems, working with them on planning and installation. The aim is to provide a solution which impacts on users freedoms as little as possible.

https://www.avecto.com/
Industries Application software Security and surveillance Technology consultancy and IT and telecommunications support
48 Coincover Wales Growth 50-99 £31,621,522

Coincover

Coincover develops security software designed to ensure users do not lose access to their digital assets, as well as providing cryptocurrency insurance services.

https://www.coincover.com/
Industries Application software Insurance Investment banking and corporate finance Security and surveillance Wealth, asset and investment management
49 EnSilica South East Established 100-249 £30,450,000

EnSilica

EnSilica designs and manufactures ICs (integrated circuits) used in turn-key chip systems.

https://www.ensilica.com/
Industries Application software Chips and processors Electronics hardware Embedded systems Manufacturing Security and surveillance
50 Geordie AI London Venture 25-49 £30,176,070

Geordie AI

Geordie AI operates a cybersecurity platform aiming to support businesses to manage and secure AI agents with real-time monitoring and risk controls.

https://www.geordie.ai/
Industries Application software Data provision and analysis Risk and compliance Security and surveillance
51 Lunio North West Growth 50-99 £30,145,071

Lunio

Lunio develops automation software for PPC advertisements, aimed at minimising the affects of click fraud.

https://www.lunio.ai/
Industries Application software Marketing, branding and advertising Security and surveillance
52 Ava Security London Exited 50-99 £28,151,374

Ava Security

Ava Security develops cyber security software for businesses, allowing data centre segmentation, user behaviour analytics and threat detection.

https://www.jazznetworks.com/
Industries Application software Data provision and analysis Security and surveillance
53 MIRACL London Growth 10-24 £27,077,228

MIRACL

MIRACL develops cybersecurity software designed to enable multi-factor authentication as an alternative to passwords (meaning personal data is not stored or transmitted) to enhance digital security for both website and mobile applications.

https://miracl.com/
Industries Application software Security and surveillance Server software
54 DiffusionData South East Growth 25-49 £25,484,184

DiffusionData

DiffusionData develops data distribution software that enables mobile applications to be updated rapidly to cope with real-time changes.

https://www.diffusiondata.com/
Industries Application software Data management
55 CyberSmart London Growth 50-99 £25,304,401

CyberSmart

CyberSmart develops software designed to help SMEs maintain compliance with cyber security standards.

https://cybersmart.co.uk/
Industries Application software Risk and compliance Security and surveillance
56 Cado Security North West Exited 25-49 £25,183,187

Cado Security

Cado Security develops cloud-based incident response software which enables users to analyse threats, aiming to reduce recovery time and mitigate damage.

https://www.cadosecurity.com/
Industries Application software Data provision and analysis Security and surveillance
57 Paydock North West Venture 50-99 £25,000,000

Paydock

Paydock operates a payments orchestration platform allowing businesses to manage all their payment systems in one place.

https://paydock.com/
Industries Application software Banking Data aggregation Data provision and analysis Payment processing Security and surveillance
58 Maze London Seed 10-24 £23,146,970

Maze

Maze develops AI-powered vulnerability management tools that identify, prioritise, and remediate cloud security risks.

https://mazehq.com/
Industries Application software Data provision and analysis Robots and automation Security and surveillance
59 Blockhouse South East Seed 25-49 £21,924,894

Blockhouse

Blockhouse develops blockchain systems for data protection, aiming to lower energy consumption compared to alternatives.

https://tbtl.com/
Industries Application software Data management Payment processing Security and surveillance Wealth, asset and investment management
60 Isode London Established 25-49 £21,600,000

Isode

Isode develops server software for secure messaging and directory services for the military, aviation and intelligence sectors.

https://www.isode.com/
Industries Application software Civil engineering Server software
61 Metomic East of England Venture 25-49 £21,184,602

Metomic

Metomic creates transformation APIs and tools for developers, aiming to allow users to update websites and apps to follow GDPR compliance, while remaining user friendly.

https://www.metomic.io/
Industries Application software Data management Risk and compliance Security and surveillance
62 Complyance London Venture 10-24 £20,880,500

Complyance

Complyance develops an online platform that uses artificial intelligence technology to automate a range of compliance processes for businesses.

https://complyance.com/
Industries Application software Data management Data provision and analysis Risk and compliance Security and surveillance
63 Crypto Quantique London Venture 25-49 £20,860,554

Crypto Quantique

Crypto Quantique develops cybersecurity technology using cryptography and quantum physics.

https://www.cryptoquantique.com/
Industries Application software Electronics hardware Mobile, internet and wireless hardware Security and surveillance
64 Atto East of Scotland Growth 25-49 £19,851,366

Atto

Atto develops online verification tools for use in a range of industries, such as banks and letting agencies.

https://www.atto.co/
Industries Application software Security and surveillance
65 INCOPRO London Exited 100-249 £19,206,950

INCOPRO

INCOPRO offers legal services to protect the intellectual property of businesses. The company has also introduced its own brand protection technology that compiles reports on major threats and infringements of clients' intellectual property rights.

http://www.incoproip.com/
Industries Application software Legal services Risk and compliance Security and surveillance
66 42Crunch London Venture 25-49 £18,841,589

42Crunch

42Crunch develops a security platform for enterprises to protect their IT infrastructure, through a range of tools aiming to target different aspects of security, such as firewalls.

https://42crunch.com/
Industries Application software Security and surveillance
67 Kick ICT West of Scotland Growth 100-249 £18,564,118

Kick ICT

Kick ICT provides a range of IT and telecommunications support services, developing a cloud-based platform and offering cyber security services.

https://www.kickict.co.uk/
Industries Application software Data centres Distribution and wholesale Electronics hardware Estate agencies Higher education Mobile, internet and wireless hardware Property development and construction Security and surveillance Technology consultancy and IT and telecommunications support
68 IDlayr London Venture 10-24 £17,992,166

IDlayr

IDlayr develops an authentication platform for mobile apps, which uses mobile phone numbers for verification.

https://idlayr.com/
Industries Application software Security and surveillance
69 OneID North West Venture 25-49 £17,818,251

OneID

OneID develops digital identity assurance software that aims to help consumers, banks and businesses manage validated digital identities and to help consumers control their data privacy and digital identity.

https://oneid.uk/
Industries Application software Banking Security and surveillance
70 Cyacomb East of Scotland Venture 25-49 £17,194,695

Cyacomb

Cyacomb develops digital forensics software which aims to accelerate the scanning process of social media, cloud companies and computers seized by the police to detect criminal activity and harmful content.

https://www.cyacomb.com/
Industries Application software Data management Data provision and analysis Legal services Risk and compliance Security and surveillance Social media
71 Post-Quantum South West Venture 10-24 £16,202,468

Post-Quantum

Post-Quantum (formerly SRD Wireless) provides cryptography and data loss prevention services to businesses; the company's main product, a messaging app called PQChat, employs an algorithm that the company claims is secure against the most advanced decryption techniques.

https://post-quantum.com/
Industries Application software Hazard and damage control Health and safety Security and surveillance
72 FinGo South East Venture 10-24 £15,772,752

FinGo

FinGo has developed a product called that scans the unique pattern of a person's blood vessels on their fingers. The product allows consumers to complete transactions using only their finger.

https://www.fingo.to/
Industries Application software Electronics hardware Mobile, internet and wireless hardware Payment processing
73 CultureAI North West Growth 25-49 £15,570,000

CultureAI

CultureAI develops software designed to improve security within organisations by educating individuals and providing a range of tools.

https://www.culture.ai/
Industries Application software Data provision and analysis Security and surveillance Technology consultancy and IT and telecommunications support Tutoring, training, coaching and skills development
74 Push Security London Venture 50-99 £15,408,503

Push Security

Push Security equips employees with the tools for digital security while using SaaS.

https://pushsecurity.com/
Industries Application software Security and surveillance Technology consultancy and IT and telecommunications support
75 Billon London Growth 25-49 £15,259,601

Billon

Billon develops software that uses blockchain technology to enable the storage of money and data.

https://billongroup.com/
Industries Application software Investment banking and corporate finance Security and surveillance
76 Preservica South East Growth 100-249 £15,064,931

Preservica

Preservica has developed software that can be used to digitally preserve information. The software protects and future-proofs data and digital content by storing the information in a format that can be read by future technologies.

https://preservica.com/
Industries Application software Data management
77 Resillion West Midlands Growth 250-499 £15,029,717

Resillion

Resillion provides IT consultancy and support services specialising in engineering, cyber security and testing.

https://www.resillion.com/
Industries Application software Data provision and analysis Mobile, internet and wireless hardware Physical product design, testing and quality assurance Risk and compliance Robots and automation Security and surveillance Technology consultancy and IT and telecommunications support
78 Protection Group International London Growth 100-249 £14,975,307

Protection Group International

Protection Group International provides security services to clients, covering cyber security, intelligence and geopolitical risk analysis, and training.

https://www.pgitl.com/
Industries Risk and compliance Security and surveillance Tutoring, training, coaching and skills development
79 Celerity North West Established 100-249 £14,800,000

Celerity

Celerity provides their clients with a range of IT support services.

https://www.celerity-uk.com/
Industries Security and surveillance Technology consultancy and IT and telecommunications support
80 RevEng.ai London Venture 10-24 £14,635,531

RevEng.ai

RevEng.ai develops AI software which aims to understand software supply chains in relation to businesses cyber security.

https://reveng.ai/
Industries Application software Data provision and analysis Security and surveillance Supply chain management
81 Exonar South East Exited 25-49 £14,221,890

Exonar

Exonar has developed data analysis software that enables companies to identify and allocate important documents and to manage access to those files in order to increase security.

https://www.exonar.com/
Industries Application software Data provision and analysis
82 CyberOwl London Venture 50-99 £13,842,212

CyberOwl

CyberOwl develops software which aims to detect early warnings of cyber attacks, specialising in the maritime sector.

https://cyberowl.io/
Industries Application software Boats and ships Ports, docks and marine infrastructure Risk and compliance Security and surveillance Supply chain management
83 BR-DGE East of Scotland Growth 50-99 £13,570,111

BR-DGE

BR-DGE develops a mobile payments system for businesses, encompassing financial reconciliations, fraud management and foreign exchange.

https://br-dge.to/
Industries Application software Payment processing Security and surveillance
84 Keyless South West Venture 50-99 £13,066,501

Keyless

Keyless develops a blockchain based protocol which aims to enable interoperability between different applications via the user's digital identity.

https://www.keyless.io/
Industries Application software Security and surveillance
85 Folio.ID London Growth 5-9 £12,546,186

Folio.ID

Folio.ID develops a digital wallet application to store electronic copies of identification and manage other cards or documents.

https://folio.id/
Industries Application software Assistants, secretaries and administrative support Security and surveillance
86 Blackford East of Scotland Growth 100-249 £12,011,002

Blackford

Blackford has developed software that can analyse very large sets of images (e.g. brain scans).

https://www.blackfordanalysis.com/
Industries Application software Data provision and analysis Management and strategy consultancy Risk and compliance Security and surveillance Technology consultancy and IT and telecommunications support
87 LIMA North West Established 100-249 £12,000,000

LIMA

LIMA offers a range of IT infrastructure and consultancy services.

https://www.lima.co.uk/
Industries Security and surveillance Server hardware Technology consultancy and IT and telecommunications support
88 Coinfirm London Exited 50-99 £11,997,638

Coinfirm

Coinfirm develops a risk and compliance platform for blockchain-based transactions, that aims to combat money-laundering and the financing of terrorism as well as helping clients meet other regulatory requirements regarding crypto-currencies.

https://www.coinfirm.com/
Industries Application software Risk and compliance Wealth, asset and investment management
89 Amiqus East of Scotland Growth 50-99 £11,833,615

Amiqus

Amiqus develops software that provides legal expertise to users to assist them in dispute resolution and enables users to perform identity checks through record, photo and bank account verification.

https://amiqus.co/
Industries Application software Legal services
90 KYND London Venture 50-99 £11,660,115

KYND

KYND develops software designed to help companies manage, monitor, and report on risk from cyber crime, tailored towards the insurance sector.

https://www.kynd.io/
Industries Application software Insurance Risk and compliance Security and surveillance
91 Prevalent AI London Venture 100-249 £11,627,906

Prevalent AI

Prevalent AI develops a cloud-based platform which provides data analytics on digital security and risk for businesses.

https://www.prevalent.ai/
Industries Application software Data provision and analysis Security and surveillance
92 DynaRisk London Growth 10-24 £11,405,705

DynaRisk

DynaRisk provides online security services to businesses and individuals by conducting cyber security risk assessments, and providing personalised reports on how to improve your online security.

https://dynarisk.com/
Industries Application software Data provision and analysis Security and surveillance
93 Augur London Seed 25-49 £11,300,000

Augur

Augur develops AI software that analyses data from camera and sensor networks to detect suspicious behaviour and improve security in physical spaces.

https://augurinitiative.ai/
Industries Application software Data provision and analysis Military and defence Photography and videography Security and surveillance Sensors
94 ArQit London Venture 50-99 £11,166,286

ArQit

ArQit develops a global quantum key distribution network, a communication method using encryption, designed to increase security on the internet.

https://arqitgroup.com/
Industries Application software Distribution and wholesale Security and surveillance
95 Ativion East Midlands Established 50-99 £10,968,579

Ativion

Ativion develops digital security and student management software for educational organisations.

https://www.ativion.com/
Industries Application software Data provision and analysis Security and surveillance Technology consultancy and IT and telecommunications support
96 e2e-assure South East Growth 50-99 £10,500,000

e2e-assure

e2e-assure provides cyber-security services, specialising in protective monitoring and security operations centre.

https://e2e-assure.com/
Industries Application software Data provision and analysis Military and defence Risk and compliance Security and surveillance Technology consultancy and IT and telecommunications support
97 MUSO London Venture 50-99 £10,275,276

MUSO

MUSO makes anti-piracy software that allows rightholders to protect their content online.

https://www.muso.com/
Industries Application software
98 Netacea North West Growth 50-99 £10,260,723

Netacea

Netacea develops software solutions which use machine learning to reduce businesses' susceptibility to bot attacks.

https://netacea.com/
Industries Application software Data provision and analysis Security and surveillance
99 Condukt London Seed 10-24 £10,100,000

Condukt

Condukt provides real-time identity and compliance solutions to help businesses scale their operations efficiently.

https://condukt.co/
Industries Application software Data provision and analysis Investment banking and corporate finance Lead generation and sales support Risk and compliance
100 Atech Support London Established 100-249 £10,000,000

Atech Support

Atech Support provides cloud, IT Support services, and digital security consultancy services.

https://atech.cloud/
Industries Security and surveillance Technology consultancy and IT and telecommunications support

Unlock the full list of top 100 digital security companies

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The future of digital security in the UK

Digital security is a mature sector behaving like one: growth in company numbers has slowed, formation has cooled, and capital is concentrating in proven players rather than spraying across new entrants. That maturity is not a weakness but a sign of a market that has found product-market fit, where the questions are now about scale, consolidation, and which technologies the next regulatory and threat cycle will reward. Rising AI-driven attacks, tightening data-protection regimes, and the looming arrival of quantum computing all point to sustained demand, and the sector’s exceptionally high exit rate means established acquirers are actively hunting UK targets.

The clearest momentum shows up in three clusters within the top 100. The identity and anti-fraud group is the sector’s commercial core, with GB Group (£568m), Callsign (£215m), Onfido (£176m), Featurespace (£116m), iProov (£64m), OneID (£18m), IDlayr (£18m), and FinGo (£16m) all building the verification and fraud-prevention rails for banks and platforms. A core cyber-defence cluster spans threat detection and security testing: Darktrace (£173m), Immersive Labs (£162m), Netcraft (£100m), PortSwigger (£89m), Glasswall (£66m), Hack The Box (£56m), Red Sift (£56m), and Push Security (£15m). And a third group is positioning for the crypto and post-quantum era — Copper (£238m), Elliptic (£169m), PQShield (£50m), Coincover (£32m), Crypto Quantique (£21m), Post-Quantum (£16m), Keyless (£13m), and ArQit (£11m) — building security for digital assets and for a world in which today’s encryption may no longer hold.

With this in mind, it’s possible that — depending on how fast quantum computing forces a cryptographic transition, whether AI shifts the balance towards attackers or defenders, and how aggressively overseas acquirers continue buying UK security firms — the sector could either consolidate into a handful of scaled platforms or keep feeding a steady pipeline of acquisition targets for larger players. The record exit rate suggests the second pattern is deeply entrenched, and the open question is whether any UK security company can break it by scaling into a category leader rather than selling. The next cryptographic and AI cycle will decide which names from today’s ranking are still independent in five years.

FAQ

The top 100 are led by BT, OneTrust, GB Group, Quantexa, and Copper, followed by a broad field of identity, anti-fraud, cyber-defence, and crypto-security businesses. The full ranking of all 100 companies, with funding figures and company profiles, is available above and in full on the Beauhurst platform.

Companies are ranked by total equity raised — the cumulative amount of investment they have secured through equity fundraisings over their lifetime, as recorded on the Beauhurst platform.

The top 100 companies have together raised £7.30b. Across the entire digital security sector, UK companies have raised £9.64b, meaning the top 100 account for roughly 76% of the total.

Digital security refers to the technologies and services that protect data, identities, transactions, and infrastructure from misuse. In the UK it spans cybersecurity, identity verification and fraud prevention, encryption and post-quantum cryptography, compliance software, and managed IT security services.

London is home to 54 of the top 100 companies, with the North West a notable second on 13 — ahead of the South East on 12. In total, the top 100 are spread across 12 UK regions.

Yes, though more slowly than newer sectors. The number of active digital security companies has grown 114% over the past decade to around 6,500, but company formation has cooled recently and funding has settled below its 2021 peak, pointing to a maturing, consolidating market.

The sector spans identity verification and anti-fraud, cybersecurity threat detection and testing, encryption and post-quantum cryptography, crypto and blockchain security, regulatory compliance software, and managed IT security and consultancy services.

Yes. The top 100 ranges from large established incumbents such as BT through to seed-stage startups, with a notably high number of companies — 11 — that have already been acquired, reflecting the sector’s heavy M&A activity.

The data is drawn live from the Beauhurst platform, which is updated continuously as new fundraisings, company information, and Companies House filings are recorded.

All figures are sourced from the Beauhurst platform, which tracks the UK’s companies using data from Companies House, regulatory filings, news sources, and direct company information.

Working with Beauhurst

Discover even more insights into digital security companies across the UK and Germany. The Beauhurst company data platform enables you to be among the first to find the next generation of industry-leading cybersecurity and identity businesses — as soon as they show growth potential.

With our data, you can analyse market trends, download charts, and export the information you need to make finding the next hot digital security companies effortless. And with up-to-the-minute data and industry-leading insights, we make finding new companies simple.

To see the platform in action, simply book a tour of the platform using the form below or, if you’re short on time, try one of our online platform demos.

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