18 Best Security Startups in Uk to Watch in 2025

The Definitive Seedtable Ranking of Security 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 18 start-ups with an aggregate funding of $236.8m. The average funding per company in this subset is $13.2m.

Last update to the database: Jul 15, 2025. See changelog.

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4

Funding Rounds

$23.8m

Money raised

Wintermute is a global algorithmic market maker in digital assets.

Key people:

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.

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:

3

Funding Rounds

$1.5m

Money raised

A company that specializes in remote video analytics. It is located in London, England and was founded in 2016.

Key people:

11

Funding Rounds

$7.1m

Money raised

My1login is a company founded in 2007 by Michael Newman.

Key people:

7

Funding Rounds

$6.7m

Money raised

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

1

Funding Rounds

Cvedia is a company that offers end-to-end computer vision solutions using software, hardware, and architecture integration.

1

Funding Rounds

$276.8k

Money raised

Miracl is a London-based provider of secure authentication services.

8

Funding Rounds

$77.6m

Money raised

Kromek develops and manufactures radiation detection devices for the medical, nuclear and other industries.

Industries:

Key people:

2

Funding Rounds

$33.0m

Money raised

Veridium is a leader in single step - multi factor biometric authentication, designed to safeguard enterprises' most critical assets.

1

Funding Rounds

$59.9k

Money raised

Is-Instruments Limited designs and develops remote sensing instrumentation.

Industries:

Key people:

1

Funding Rounds

$5.0m

Money raised

BullGuard is a cybersecurity and antivirus software company.

1

Funding Rounds

$1.1m

Money raised

XINTEC is a United Kingdom-based company founded by Sean Killeen.

Location:

Key people:

2

Funding Rounds

$16.6m

Money raised

Guide creates true online learning products. Their flagship provides asynchronous teacher training and online mentoring for schools globally

Industries:

3

Funding Rounds

$33.0m

Money raised

Allevate Face Searcher is a company founded in 2007 by Kevin McVey.

5

Funding Rounds

$12.5m

Money raised

CertiVox is a United Kingdom-based company founded in 2011.

1

Funding Rounds

$2.3m

Money raised

Deverium is a cross-border identity verification platform founded in 2019 by Edvardas Maslauskas.

Key people:

1

Funding Rounds

$6.5m

Money raised

Burbank is a digital payments platform founded in 2021 by Justin Pike.

Key people:

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