Ellie Horvath
At Best Startup London we track over 100,000 London based startups and over 500,000 people who hold key positions in these companies. We use this directory of startups to highlight top employees, founders and organisations we think deserve more appreciation than they are currently getting.
We’ve ranked the top 101 Cyber Security companies in London. The companies, startups and institutions listed in this article are all exceptional companies, well worth a follow. We have included links to their websites, socials and CrunchBase (if you’re interested in their financials).
We selected the organisations listed in this article based on:
- Track record
- Executive leadership
- Market share
- Innovation
- ESG rating
Our Data – We source our data from OSINT (open source intelligence) and public directories such as Crunchbase, SemRush and many more. The data from these sources should be treated with a degree of caution and verified yourself.
Top Cyber Security Companies & Startups (London)
Arqit Limited
| Founders | David Williams |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Arqit develops a quantum encryption platform.
G-Research
| Founders | Ben Leadsom, Chris Goddard, Jennifer Coyle Byrne |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
G-Research is a research and technology company that specializes in Quantitative Research and IT Infrastructure.
CyberSmart
| Founders | Jamie Akhtar, Mariella Thanner |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
An automated end-to-end cyber security compliance platform that helps SMB’s.
Garrison Technology
| Founders | David Garfield, Henry Harrison |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Garrison Technology is a cybersecurity firm that offers a secure remote browsing technology.
CybSafe
| Founders | Oz Alashe, Sean Lumley |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
A behavioural security and data analytics platform helps people make better security decisions, and improve their security behaviour.
Bloc Ventures
| Founders | Bruce Beckloff, David Leftley |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Bloc Ventures is an early-stage Deep Tech investment company. Pitch to Bloc here: https://blocventures.com/pitching/
Tessian
| Founders | Edward Bishop, Thomas Adams, Tim Sadler |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Tessian creates a Human Layer Security that helps people work without security disruptions getting in the way.
CyberOwl
| Founders | Siraj Ahmed Shaikh |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
CyberOwl offers an early warning system for cyber attacks through real-time monitoring of high value targets for malicious behavior.
Sumsub
| Founders | Andrey Severiukhin, Jacob Sever, Peter Sever, Vyacheslav Zholudev |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Sumsub is an AI-based solution that automates identity verification and anti-fraud.
seedata.io
| Founders | Enrico Faccioli, Matt Holland |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Seedata.io is a cybersecurity platform that helps companies mitigate data leak incidents and crime threats.
Risk Ledger
| Founders | Daniel Saul, Haydn Brooks |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Risk Ledger is the world’s most innovative vendor risk management platform, built on the model of a secure social network.
Crypto Quantique
| Founders | Kumi Thiruchelvam, Patrick Camilleri, Shahram Mossayebi |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Crypto Quantique offers hardware based cyber-security solution for authentication and encryption in a wired local network.
SafeToNet
| Founders | Georgina Pursey, Jack Pursey, Richard Pursey, Sharon Pursey |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
SafeToNet makes the digital world safer for children to explore and enjoy.
Simudyne
| Founders | Justin Lyon |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Simudyne helps financial organisations to understand their world and make the best possible decisions.
Digital Catapult
| Founders | Jeremy Silver, Neil Crockett |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Digital Catapult drives early adoption of advanced digital technologies to grow the country’s economy.
BoxyHQ
| Founders | Carlos Samame, Deepak Prabhakara |
| Follow | Website, Crunchbase, Twitter, Github, Linkedin |
BoxyHQ helps developers automate product security, and it provides low-code APIs to enable enterprise compliant security
Post-Quantum
| Founders | Andersen Cheng, CJ Tjhai, Martin Tomlinson |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Post-Quantum is a world-leader in quantum-safe encryption, blockchain and digital identity
KYND
| Founders | Andy Thomas |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
KYND is a cyber risk start up.
Chainvine
| Founders | Niclas Wigstrom, Oliver Oram, Rajiv Mathur |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Next Generation Enterprise Systems / Identity Access Management (IAM) / Technology Providers Blockchain
Flashpoint
| Founders | Alex Konoplyasty, Michael Szalontay |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Flashpoint is an international asset management firm investing in tech businesses.
Intruder
| Founders | Chris Wallis, David Robinson |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Intruder is a cloud-based vulnerability scanner that finds cyber security weaknesses in your external infrastructure.
iProov
| Founders | Andrew Bud |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
iProov develops face authentication technology for online identity verification by global banks and governments.
Privitar
| Founders | Gerard Buggy, Jason du Preez, John Taysom |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Privitar offers a data privacy platform that protect their customers’ sensitive personal data and to deliver comprehensive data privacy.
Callsign
| Founders | Ian Welch, Zia Hayat |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Delivering digital trust through simple secure customer interactions
eXate
| Founders | Peter Lancos, Sonal Rattan |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
eXate unlocks the value of production data by allowing you to share it safely, because data privacy is at the heart of everything we do.
Moonshot
| Founders | George Hawkins, Vidhya Ramalingam |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Moonshot is a data analytics company, which designs new technology to identify and mitigate online harms.
OutThink
| Founders | Flavius Plesu |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cybersecurity human risk management platform (SaaS)
Goldilock
| Founders | Anthony Hasek, Jarrod Epps, Stephen Kines |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Data and Critical Infrastructure Security
Ravelin
| Founders | Leonard Austin, Mairtin O’Riada, Martin Sweeney, Nick Lally, Stephen Whitworth |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Ravelin is a smart fraud detection and prevention platform that helps companies stop online payment fraud.
BitNinja.io
| Founders | George Egri, Viktoria Vereb |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Providing server security services worldwide
AimBrain
| Founders | Alesis Novik, Andrius Sutas |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
AimBrain helps organisations detect and prevent fraud. Anomaly detection, behavioural biometrics & 3 active biometric authentication modules
Corax
| Founders | Jonathan Pope, Tom Beale |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cyber risk intelligence platform providing data and modelling on the cyber exposure of millions of companies worldwide.
Encode
| Founders | Harry Eliopoulos, Panos Dimitriou |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Enorasys Security Analytics enables continuous cyber situational awareness to address advanced persistent threats (APTs).
TiG Data Intelligence
| Founders | Adam Maurice, Des Lekerman |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
TIG is a provider of cloud services, unified communications, and infrastructure solutions.
My1Login
| Founders | Michael Newman |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
My1Login is a next generation Identity and Access Management solutions for Enterprise.
Heliocor
| Founders | Angel Marquez, Owen Hall, Vikas Tripathi |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Heliocor is a regulatory technology company.We are building a global anti fraud ecosystem based on our Robolitics and Dokstor SaaS products.
Cyscale
| Founders | Andrei Milas, Manuela Ticudean, Ovidiu Cical |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cloud Native – Automated Cloud Security – scalable Products and Services for Cloud Cybersecurity, DevSecOps and Cloud Security Management.
ATAR Labs
| Founders | Burak Dayıoğlu, Gokhan Say, Murat Tora |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
ATAR Labs builds next generation SOAR platforms. ATAR helps SOCs become more vigilant and effective while helping them achieve more.
AppSec Phoenix
| Founders | Alfonso Eusebio, Berlinda Kugara, Dimitri Calianno, Francesco Cipollone, Stefano Longhi |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
SaaS XSPN – Next Generation Application & Cloud Security Posture Management ASPM + CSPM
Claranet
| Founders | Ben White, Charles Nasser |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Claranet is an expert in modernising and running critical applications and infrastructure.
swIDch
| Founders | Chang-Hun Yoo |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
swIDch is an information technology company that offers secure authentication through dynamic codes.
Gospel Technology
| Founders | Ian Smith |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Gospel Technology is an enterprise data security platform, providing inter-enterprise data for secure & ethical business collaboration.
SIRP
| Founders | Faiz Ahmad Shuja, Muhammad Omar Khan |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Risk-Based Security Orchestration, Automation & Response (SOAR) Platform
Shard X
| Founders | Navaho de Wet, Yaniv Neu-Ner |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Shard X develops technology for crypto custodians, in order to boost the security of its services.
Strike
| Founders | Santiago Rosenblatt |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Securing worldwide enterprises by connecting them with top cybersecurity professionals through Continuous Pentesting.
Panaseer
| Founders | Charaka Goonatilake, Mike MacIntyre, Nik Whitfield, Sophie Harrison |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Panaseer helps businesses make informed, risk-based security decisions.
42Crunch
| Founders | Isabelle Mauny, Jacques Declas, Philippe Leothaud |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
42Crunch is an API Security platform, addressing the development, testing, and deployment security requirements of API infrastructure.
Armour Communications
| Founders | Andy Lilly, David Holman |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Armour Communications provides government-grade encryption for secure communications.
RankedRight
| Founders | Kristan Bullett, Peter Yeo, Thomas MacKenzie |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
RankedRight is a vulnerability triage platform that prioritises security based on customer defined rules.
Begin Capital
| Founders | Alexey Menn, Ruslan Sarkisyan |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Begin Capital is the international venture capital fund investing across the globe with a focus on Europe
Guardara
| Founders | Mitali Rakhit, Zsolt Imre |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Guardara focuses on fuzz testing, a software testing technique for discovering coding errors and security loopholes.
Cynomi
| Founders | David Primor, Roy Azoulay |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cynomi addresses a critical gap in mid-market cyber protection – creating and executing a cyber and compliance strategy .
Cado Security Ltd
| Founders | Christopher Doman, James Campbell |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cado Security provides the cloud investigation platform that empowers security teams to respond to threats at cloud speed.
TrustElevate
| Founders | Alena Lapukhova, Michal Haris, Rachel O’Connell |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Trust Elevate solves the problem of age verification and parental consent for young adults and children in online transactions.
Cursor Insight
| Founders | Bence Golda, Tamas Zelczer |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cursor Insight is a software development company with many years of experience in human movement analysis.
Nettoken
| Founders | Charlotte Slingsby, Ela Neagu, Simonetta d’Ottaviano |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
The control panel for your digital identity!
MindLink Software
| Founders | Howard Travers, Joseph Do |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
MindLink provides business critical collaboration enabled through Enterprise Chat.
Keyless
| Founders | Andrea Carmignani, Fabian Eberle |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Pioneering privacy-preserving cloud-native biometric authentication to enable businesses adopt zero-trust passwordless authentication.
Qredo
| Founders | Anthony Foy, Brian Spector |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Qredo is a platform that provides secure and fast movement of digital assets.
Superscript
| Founders | Annabel Mekelenkamp, Ben Rose, Cameron Shearer |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Superscript provides business insurance designed specifically to meet the fast-changing needs of small businesses.
Q-Branch Labs
| Founders | Bozhidar Genev, Jim McCoy |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cybersecurity protection for remote and work from home employees
SenseOn
| Founders | David Atkinson |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
SenseOn’s self-driving cyber defense platform automates the process of threat detection, investigation and response.
Veridium
| Founders | Hector Hoyos |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Veridium is a leading provider of strong digital authentication platform
Egress Software
| Founders | John Goodyear, Neil Larkins, Tony Pepper |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Egress is a software company that specializes in human layer security designed to prevent accidental and intentional data breaches.
Torsion Information Security
| Founders | Peter Bradley |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Confident Data Access Control – Get control of who has access to what, why and when. Secure, Compliant, Efficient.
Meterian
| Founders | Bruno Bossola, Vivian Dufour |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Meterian is the simple and straightforward way to assess how secure are your software components.
Seers
| Founders | Adnan Zaheer |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Seers is the leading privacy and consent management platform. Already saved 50k+ companies globally from data privacy and protection fines.
Tribe Payments
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Tribe is a payments technology company providing ‘end to end’ services in the payments space.
Acunetix
| Founders | Nick Galea |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Aquinetix offers an automated tool that enables companies to scan their web apps to identify and resolve exploitable vulnerabilities.
Kryotech
| Founders | Jean-Brunel Webb-Benjamin |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Kryotech is an App Development company.
ISTARI
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
ISTARI a global cybersecurity platform dedicated to helping create a digitally resilient future for the businesses it works with.
Oxford BioChronometrics
| Founders | Adrian Neal, David Scheckel, Jeff Martinez, Sander Kouwenhoven, William Scheckel |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Armed w/Ox Bio Human Recognition Technology (HRT) advertisers reach their targets of real people with real purchasing power for real growth.
iHackLabs
| Founders | Diana Ferreiro Terol |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
iHackLabs is an international cybersecurity firm that specialized in training cyber security and ethical hacking.
AperiMail
| Founders | Michael Kingsnorth |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
The most secure and private decentralised messaging solution combining Email + Instant Messaging
drie Secure Systems
| Founders | Jeremy Suarez, Kalbir Sohi, Tom Van Neerijnen, Ulrike Eder |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Drie allows teams to rapidly develop and deploy applications to the cloud without compromising on security.
Barclays Ventures
| Founders | Gregoire Pennec |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Venture capital unit aiming to accelerate the growth of new business lines, and customer propositions around areas of disruptive technology
Cyberlytic
| Founders | St. John Harold, Stuart Laidlaw |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cyberlytic’s web application security software uses AI to deliver advanced threat detection and prioritisation of web-injection attacks.
Phystech Ventures
| Founders | Daniel Shaposhnikov, Ivan Protopopov, Olga Maslikhova, Petr Lukyanov, Serguei Beloussov |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Phystech Ventures is an early-stage deeptech VC firm with focus on next-gen computing, life sciences, energy, mobility, and space.
Sphere Secure Workspace
| Founders | Dominik Thalmann, Kubi Mensah, Philip Gasslander |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Sphere Secure Workspace makes it easy for employees to securely use their personal devices at work.
ThreatSpike Labs
| Founders | Adam Blake, Kate Blake |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
ThreatSpike Labs provides a managed security service using a unique, in-house developed technology platform.
Caretower
| Founders | George Neophytou, Phydos Neophytou |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Caretower is a specialist cybersecurity integrator and managed service provider with over 20 years of experience.
Privasee
| Founders | Manuel Martinez Chamorro |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Data privacy and compliance platform
Fluency
| Founders | Ian Anderson, Sinead Mac Manus |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Fluency offers free online courses in SEO, digital marketing, and social media.
CyLon
| Founders | Alex van Someren, Grace Cassy, Jonathan Luff |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
CyLon is the world’s leading cyber security accelerator and seed investment programme.
PA Consulting Group
| Founders | Dr David Seymour, Ernest E. Butten, Tom H. Kirkham |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
PA Consulting Group provides management consulting, IT consulting, and technology and innovation services.
AppsPicket
| Founders | Kunal Sharma, Raghav Bhaskar |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Frictionless secure two factor authentication based on innovative cryptographic protocol.
Silobreaker
| Founders | Joakim Marlov, Kristofer Mansson, Mats Bjore, Per Lindh |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Silobreaker builds intelligence technology that makes sense of unstructured data on the web.
Byzia Corporation
| Founders | Toni Kovač |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Byzia Corporation is upcoming company based in UK and successor of Byzia Technology LTD
Lineal
| Founders | Unknown |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Lineal leverages AI and process-driven workflows to solve data needs for law firms and corporations.
RedHunt Labs
| Founders | Shubham MIttal, Sudhanshu Chauhan |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Attack Surface Management – NVADR [https://redhuntlabs.com/nvadr]
Cossack Labs
| Founders | Chris Hennings, Eugene Pilyankevich, Julian Swallow |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Cossack Labs provides reliable data security and cryptographic solutions for large enterprises, startups, and tech-savvy SMEs.
PropCoin
| Founders | Angus Abbott, Peter Bird, Tom Cartlidge |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
A truly asset-backed cryptocurrency business
CYKEEP Ltd.
| Founders | Ahmad Baker, Marsel Adawi |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
CYKEEP Is Cyber Security Startup
Ukkobox
| Founders | Edgard Regolão Jr, Paul Chu, Rafael Libardi |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Multi cloud protected storage layer service for high sensitive data.
CyberSparta
| Founders | Chris Woods |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
CyberSparta provides IT network solutions.
Ohalo
| Founders | Alistair Jones, Kyle DuPont |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Ohalo helps automate data governance for modern organizations
Verimuchme
| Founders | Olga Saliba, Rehman Zafar |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Verimuchme is a digital wallet and exchange platform of verified personal information and documentation.
Five Rivers Solutions
| Founders | Lovepreet Singh |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Five Rivers is a Multinational Conglomerate Company Headquartered in London, UK.
Wipro Digital
| Founders | Karl A L Smith |
| Follow | Website, Crunchbase, Twitter, Facebook, Linkedin |
Wipro Digital, the digital business unit of Wipro
