69 Best Cybersecurity Startups in Uk to Watch in 2025

The Definitive Seedtable Ranking of Cybersecurity Startups in Uk

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 153 start-ups with an aggregate funding of $7.8b. The average funding per company in this subset is $113.7m.

Last update to the database: Feb 18, 2025. See changelog.

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10

Funding Rounds

$1.6b

Money raised

Snyk is a technology company offering a software development security platform using open-source code.

9

Funding Rounds

$427.0m

Money raised

Interos is a Virginia-based company developing a logistics assurance platform designed for supply chain risk management, through a breakthrough AI SaaS platform.

5

Funding Rounds

$37.7m

Money raised

42Crunch is an enterprise API security platform with integrated services, including an API firewall, to discover and remediate API security vulnerabilities.

Location:

Key people:

6

Funding Rounds

$136.5m

Money raised

Egnyte delivers secure content collaboration, compliant data protection, and simple infrastructure modernization, all through a single SaaS solution.

Key people:

6

Funding Rounds

$317.0m

Money raised

BigPanda offers a platform that helps IT Ops, NOC, and DevOps teams detect, investigate, and resolve IT incidents.

5

Funding Rounds

$212.8m

Money raised

Pindrop is a cybersecurity company developing voice security and authentication solutions.

8

Funding Rounds

$28.3m

Money raised

Hazy is a machine learning company creating statistically controlled synthetic data for fraud detection and risk modeling.

8

Funding Rounds

$729.5m

Money raised

Sysdig is a unified approach to container security, microservices monitoring, and forensics, with Kubernetes, Prometheus, and Falco support.

Key people:

7

Funding Rounds

$184.7m

Money raised

Tessian (formerly Checkrecipient) is an artificial intelligence email security platform.

4

Funding Rounds

$140.0m

Money raised

iProov is a user authentication technology company based in London.

Location:

Key people:

2

Funding Rounds

$8.0m

Money raised

Crypto Quantique is a company that specializes in quantum cyber security.

Key people:

2

Funding Rounds

$83.0m

Money raised

Mimecast is a London-based cybersecurity and email management platform company founded by Neil Murray and Peter Bauer.

Location:

Key people:

2

Funding Rounds

$3.9m

Money raised

StatusToday is an artificial Intelligence company for Employee Behavioral Analytics founded in 2015 by Ankur Modi.

1

Funding Rounds

$5.0m

Money raised

User authentication and fraud prevention with biometric Identity-as-a-Service. AimBrain provides face, voice, lipsync, behavior and anomaly detection modules.

10

Funding Rounds

$105.0m

Money raised

Elliptic is a blockchain security company founded by Tom Robinson, Adam Joyce, and James Smith.

Location:

Key people:

3

Funding Rounds

$50.0m

Money raised

Anodot is a software development company that has created a business monitoring platform.

1

Funding Rounds

$1.0m

Money raised

An artificial intelligence company that has created software to combat astroturfing, harmful social media manipulation campaigns. It was founded in 2018 and has offices in London, England and San Francisco, California.

4

Funding Rounds

$11.2m

Money raised

Post-Quantum is a company that is developing quantum-resistant encryption for protection against code-breaking quantum computers and quantum-resistant signature schemes for secure blockchain deployment.

6

Funding Rounds

$59.9m

Money raised

Yonder is a U.S-based company providing social media threat mitigation software.

3

Funding Rounds

$4.7m

Money raised

Crypta Labs is quantum security startup that is developing a quantum-based encryption chip and software to secure the Internet of Things. The company developed a Quantum Random Number Generator (QRNG) for mobile devices and an integrated security chip for others. The company is targeting transport, military and medical markets.

Key people:

4

Funding Rounds

$41.3m

Money raised

Provider of secure and governed access to data for AI and analytics.

Location:

Key people:

5

Funding Rounds

$101.3m

Money raised

Cleo is a fintech company providing an application for personal finance management.

14

Funding Rounds

$441.3m

Money raised

Tines is a dublin-based no-code security automation company founded in 2018.

6

Funding Rounds

$280.5m

Money raised

Darktrace is a British artificial intelligence company for cybersecurity.

8

Funding Rounds

$373.3m

Money raised

Quantexa is a company that enables institutions to make better decisions using their data.

Location:

Key people:

6

Funding Rounds

$19.7m

Money raised

Keyless is a privacy-preserving biometric authentication solutions provider founded in 2019 by Andrea Carmignani, Rolf Hoefer, Giuseppe Ateniese and Fabian Eberle.

Location:

Key people:

1

Funding Rounds

$20.0m

Money raised

Resolver's Integrated Risk Management platform helps plan and prepare your organization to limit the likeliness or impact of security risk and compliance events from occurring.

5

Funding Rounds

$99.6m

Money raised

CybSafe is a cloud-based platform focussed on addressing the human component of cyber security - an intelligent approach to awareness training.

Location:

Key people:

1

Funding Rounds

$5.6m

Money raised

Deep-Secure provides security solutions using network border gateway technology.

Industries:

3

Funding Rounds

$75.7m

Money raised

Bromium deliver a new technology called micro-virtualization to address the enterprise security problem and provide protection for end users against advanced malware.

5

Funding Rounds

$131.0m

Money raised

Immersive Labs is a company founded in 2017 by James Hadley.

Location:

Key people:

2

Funding Rounds

ArQit is working to provide the world's first global quantum encryption SaaS Business. They will use QKD technology to create unique keys that can be shared between two parties using laser transmissions from a satellite. The company is based in London, England and was founded in 2017.

3

Funding Rounds

$35.5m

Money raised

Slice Labs is a company offering an on-demand insurance marketplace founded in 2015 by Tim Attia.

Key people:

6

Funding Rounds

$171.3m

Money raised

Friss is a company that develops fraud detection and risk assessment software for P&C Insurance companies.

3

Funding Rounds

$9.5m

Money raised

Talkwalker is a social media analytics and monitoring tool.

11

Funding Rounds

$7.1m

Money raised

My1login is a company founded in 2007 by Michael Newman.

7

Funding Rounds

$72.8m

Money raised

Cambridge Quantum Computing (CQC) was a quantum computing company with expertise in Quantum Information Processing, Artificial Intelligence, Optimization, and Pattern Recognition. In December 2021, the company merged with Honeywell Quantum Solutions (HQS) to form Quantinuum.

Key people:

1

Funding Rounds

$6.0m

Money raised

Sum&Substance is a developer of remote verification solutions. Our technology allows online services around the world to meet regulatory requirements, prevent fraud and enhance customer confidence.

1

Funding Rounds

$12.0m

Money raised

Netacea is a cybersecurity solutions provider founded in 2018 by Mick Bradley.

Location:

Key people:

7

Funding Rounds

$581.0m

Money raised

Devo, formerly Logtrust, is a technology company that developed the first real-time big data-in-motion software, which collects and analyses big data in real-time. Devo (along with Panda Security) released several other integrated technologies. It is headquartered in Madrid, Spain.

3

Funding Rounds

$52.0m

Money raised

Platform providing smart fraud detection and prevention to stop online payment fraud.

1

Funding Rounds

$784.0k

Money raised

British company serving the defence, security, transport and energy industries

5

Funding Rounds

$36.3m

Money raised

CyberSmart is a London-based cybersecurity company developing automated compliance platform for small to medium enterprises.

2

Funding Rounds

$17.8m

Money raised

RedShield is a cybersecurity company providing web application defense systems for computers.

1

Funding Rounds

$40.0m

Money raised

Egress is a software company that specializes in compliance and privacy management solutions for unstructured data.

Location:

Key people:

4

Funding Rounds

$30.4m

Money raised

Xayn is a company founded by Felix Hahmann, Leif Nissen Lundbaek and Michael Huth.

5

Funding Rounds

$3.0m

Money raised

Factmata is a company that provides AI-enhanced digital marketing.

3

Funding Rounds

$63.5m

Money raised

Platform that helps businesses make informed, risk-based security decisions.

Location:

Key people:

7

Funding Rounds

$6.7m

Money raised

PixelPin is a cybersecurity company providing authentication security using pictures rather than passwords.

3

Funding Rounds

$136.0m

Money raised

Privitar was a London-based software development company offering a data security platform. In June 2023, Privitar was acquired by Informatica.

Location:

Key people:

6

Funding Rounds

$37.7m

Money raised

Eseye Limited is a telecommunication company based in Guildford, Surrey.

Key people:

3

Funding Rounds

$60.1m

Money raised

Eigen Technologies is a London-based artificial intelligence company founded in 2014.

6

Funding Rounds

$46.8m

Money raised

Verimatrix is a San Diego-based software company developing content security, authentication, watermarking, and cybersecurity solutions.

1

Funding Rounds

$103.1m

Money raised

Claranet are experts in modernising and running critical applications and infrastructure through end-to-end professional services, managed services and training.

5

Funding Rounds

$72.0m

Money raised

Established in 2015, we called ourselves Digital Risks. We set out with a simple ambition: to make insurance better for digital businesses. We sparked something special: great products, and a seamless experience to match. In 2020, we became Superscript. A name that, by definition, encapsulates what we're all about: elevating our customers by providing better cover. Superscript is about acknowledging all that we've achieved as Digital Risks and taking things to the next level. We now provide advised and online cover for over 1,000 business types. Our mission is to be able to share our ever-evolving customer-led offering with a broader range of businesses. To become a global leader in business insurance.

3

Funding Rounds

$62.0m

Money raised

Wandera is a San Francisco-based cybersecurity company developing mobile security and data management solutions.

Location:

Key people:

4

Funding Rounds

$8.6m

Money raised

Nu Quantum is a company developing quantum security technology founded in 2018 by Dr Carmen Palacios-Berraquero, Yuri Andersson, Matthew Applegate and Mete Atature.

5

Funding Rounds

$165.1m

Money raised

InfoSum provides a decentralized platform designed to remove the trust barriers between progress and privacy.

Location:

Key people:

3

Funding Rounds

$7.2m

Money raised

Nova Leah helps connected medical device manufacturers meet cybersecurity compliance requirements throughout the entire product lifecycle.

3

Funding Rounds

$15.5m

Money raised

Muso is a London-based cybersecurity company providing solutions for enterprises.

3

Funding Rounds

$32.8m

Money raised

SenseOn is a London-based technology company offering an AI-powered cyber security platform.

5

Funding Rounds

$134.4m

Money raised

The Only Integrated Email Security and Brand Protection Platform

4

Funding Rounds

$27.6m

Money raised

Pqshield Limited is an Oxford-based cryptography company using their cryptographic knowledge to develop cybersecurity solutions.

Location:

Key people:

2

Funding Rounds

$8.4m

Money raised

Imagen Ltd is a british software company.

1

Funding Rounds

$2.5m

Money raised

BitNinja Security is a Debrecen, Hungary-based company offering security information and event management (SIEM) software.

1

Funding Rounds

$2.5m

Money raised

SOC.OS is a London-based cybersecurity company developing an alert correlation product.

4

Funding Rounds

$2.0m

Money raised

Spherical Defence is s security solution company in San Francisco, California.

Location:

Key people:

3

Funding Rounds

$69.7m

Money raised

Data intelligence platform that helps global institutions manage strategic risks.

Location:

Key people:

2

Funding Rounds

$20.8m

Money raised

Yoti offer a suite of business solutions that span identity verification, age estimation, e-signing and AI anti-spoofing technologies.

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