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Top London Cybersecurity Companies (90)

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Artificial Intelligence • Cloud • Sales • Security • Software • Cybersecurity • Data Privacy
6 Offices
2,461 Employees

SailPoint is the leader in identity security for the cloud enterprise. Our identity security solutions secure and enable thousands of companies worldwide, giving our customers unmatched visibility into the entirety of their digital workforce, ensuring workers have the right access to do their job – no more, no less.


Fintech • Legal Tech • Software • Financial Services • Cybersecurity • Data Privacy
29 Offices
8,000 Employees

CSC is a global leader in providing business, legal, tax, and digital brand services to companies around the world. With more than 8,000 employees, CSC operates in more than 140 jurisdictions, delivering solutions that help businesses thrive. We pride ourselves on our client-focused approach, market-leading expertise, and unmatched global reach.


Big Data • Fintech • Information Technology • Business Intelligence • Financial Services • Cybersecurity • Big Data Analytics
38 Offices
15,000 Employees

TransUnion is a global information and insights company that makes trust possible by ensuring that each consumer is reliably and safely represented in the marketplace. We do this by having an accurate and comprehensive picture of each person. This picture is grounded in our legacy as a credit reporting agency which enables us to tap into both credit and public record data; our data fusion methodology that helps us link, match and tap into the awesome combined power of that data; and our knowledgeable and passionate team, who stewards the information with expertise, and in accordance with local legislation around the world. Because of our work, organizations can better understand consumers in order to make more informed decisions, and earn their trust through great, personalized experiences, and the proactive extension of the right opportunities, tools and offers. In turn, consumers can be confident that their data identities will result in the opportunities they deserve. We make trust possible, so businesses and consumers can transact with confidence and achieve great things. We call this Information for Good®—it’s our purpose, and what drives us every day.


Healthtech • Security • Software • Cybersecurity
7 Offices
957 Employees

For over 20 years, we’ve been redefining how life- and mission-critical industries enable, control, and monitor digital identities to deliver fast access, improve security, and ensure compliance. Customer success is our DNA, which is why we’re trusted by the most prominent healthcare and enterprise organizations in 45 countries.


Fintech • Professional Services • Consulting • Energy • Financial Services • Cybersecurity • Generative AI
23 Offices
6,000 Employees

Capco, a Wipro company, is a global management and technology consultancy specializing in driving transformation in the energy and financial services industries. Capco operates at the intersection of business and technology by combining innovative thinking with unrivalled industry knowledge to fast-track digital initiatives for banking and payments, capital markets, wealth and asset management, insurance, and the energy sector. Capco’s cutting edge ingenuity is brought to life through its award-winning Be Yourself At Work culture and diverse talent. TRUSTED ADVISORS - Our collaborative and entrepreneurial approach position us as trusted long-term partners to our clients. DEEP EXPERTISE - Clients look to us for clear guidance, proven expertise, and the support they need to set their companies up for success. DISRUPTIVE SOLUTIONS- We do not provide off -the-shelf answers to clients’ challenges. Instead, we work in close collaboration to understand the issues, and craft disruptive, bespoke solutions. ACCOUNTABILITY AND OWNERSHIP - We recognize every client has distinct needs and expectations, and we take ownership and accountability for the solutions we design, build, and deliver.


Cybersecurity • Data Privacy
London, England, GB
229 Employees

Callsign is pioneering digital trust through proprietary technology that uniquely mimics the way humans identify each other in the real world. Positive identification of genuine users delivers privacy, safety and minimal friction whilst ensuring that bad actors are blocked. Through a simple Swipe or Type, users can be personally recognized to a 99.999% accuracy, delivering the highest fidelity AI based user recognition for the digital world.


Machine Learning • Software • Analytics • Cybersecurity
London, England, GB
50 Employees

Venari Security provides organisations with advanced visibility into their encrypted attack surface, ensuring regulatory compliance and privacy adherence through our cryptographic discovery tool. Our focus is on crypto agility which helps you assess both external and internal cryptographic risks, preparing your business now and for the quantum future


Cloud • Machine Learning • Security • Software • Cybersecurity
2 Offices
781 Employees

Telesign provides continuous trust to leading global enterprises by connecting, protecting, and defending their digital identities. Telesign verifies over five billion unique phone numbers a month, representing half of the world’s mobile users, and provides critical insight into the remaining billions. The company’s powerful AI and extensive data science deliver identity with a unique combination of speed, accuracy, and global reach. Telesign solutions prevent fraud, secure communications, and enable the digital economy by allowing companies and customers to engage with confidence.


Big Data • Cloud • Information Technology • Other • Sales • Software • Cybersecurity
5 Offices
131 Employees

Graylog specialises in delivering top-notch Threat Detection, Investigation, & Response (TDIR) solutions, backed by our latest addition, the Graylog API security platform. As a renowned centralised log management (CLM) and Security Information Event Management (SIEM) provider, we offer unparalleled fast and efficient log analysis capabilities in critical areas such as security, compliance, operations, and DevOps. Our enterprise solution enables organisations globally to capture, store, and analyse terabytes of machine data in near-real time while our open-source product has been deployed in more than 50,000 installations worldwide, empowering individuals and small teams to perform basic log consolidation, analysis, and search functions at no cost. Recent achievements for Graylog have been inclusion in the 2021 Deloitte Technology Fast 500™, we took home two of the most prestigious cybersecurity awards in SIEM and DevSecOps from Cyber Defence Magazine at RSA in 2023, and 2024 has seen us take home gold and become the Globee Winner for Security Information & Event Management and the 2024 Globee Winner for Threat Hunting, Detection, Intelligence, and Response.


Big Data • Cloud • Consumer Web • Healthtech • Software • Cybersecurity • Generative AI
21 Offices
60,000 Employees

Since 1993, EPAM Systems, Inc. (NYSE: EPAM) has leveraged its software engineering expertise to become a leading global product development, digital platform engineering, and top digital and product design agency. Through its ‘Engineering DNA’ and innovative strategy, consulting, and design capabilities, EPAM works in collaboration with its customers to deliver next-gen solutions that turn complex business challenges into real business outcomes. EPAM’s global teams serve customers in more than 45 countries across five continents. As a recognized market leader in multiple categories among top global independent research agencies, EPAM was one of only four technology companies to appear on Forbes 25 Fastest Growing Public Tech Companies list every year of publication since 2013 and ranked as the top IT services company on Fortune’s 100 Fastest-Growing Companies list in 2019, 2020, and 2021.


Aerospace • Security • Cybersecurity • Industrial
7 Offices
108,588 Employees

Customer Focus, Innovation and Purpose are Built Into Everything We Do. Lockheed Martin. Your Mission is Ours ™. Headquartered in Bethesda, Maryland, Lockheed Martin is a global security and aerospace company principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services.


Big Data • Cloud • Software • Cybersecurity • Quantum Computing
7 Offices
75,792 Employees

Atos is a global leader in digital transformation with 110,000 employees and annual revenue of € 12 billion. European number one in Cybersecurity, Cloud and High-Performance Computing, the Group provides tailored end-to-end solutions for all industries in 73 countries. Pioneer in decarbonization services and products, Atos is committed to a secure and decarbonized digital for its clients. Atos operates under the brands Atos and Atos|Syntel. Atos is a SE (Societas Europaea), listed on the CAC40 Paris stock index. The purpose of Atos is to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence. Across the world, the Group enables its customers and employees, and members of societies at large to live, work and develop sustainably, in a safe and secure information space.


Software • Analytics • Cybersecurity
5 Offices
1,215 Employees

Robosoft is a full-service digital transformation company with a vision to Simplify Lives. We offer end-to-end solutions in product advisory, design, engineering, and analytics. We partner with enterprises to craft delightful, intuitive digital experiences that drive brand preference. We are a subsidiary of the $1.5 billion TechnoPro Holdings, Japan - a leading technology solutions company listed on the Tokyo Stock Exchange. We started operations in 1996 with Apple Inc., as our first customer. With 25 years of experience in software development, we have played an active role in the ever-changing world of digital products - from app development to emerging technologies such as voice, Artificial Intelligence, and Machine Learning. We have partnered with several prestigious brands across the globe including Discovery, ESPN, AAA, HP, McDonald’s India, Paytm, NDTV, Viacom18, Disney, BSI, and more. We have crafted over 2000 digital experiences and our apps have garnered over a billion downloads. Our clients are spread across diverse domains - Banking & Financial Services, E-commerce & Retail, Media & Entertainment, and Healthcare & Pharma to name a few. Voted ‘Mobile App Development Company of the Year’ at the Amazon Mobility Awards, our other prestigious awards include Top Wearable App Developers, Best UX Design Agency 2020, ‘Products, Upgrades, and Innovation of the Year' at CEO World Awards, Best of App Store, Apple Design Award, BAFTA, Stevie Gold Winner at American Business Awards to name a few.


Cybersecurity
London, England, GB
32 Employees

MSSPs and consulting firms leverage Cynomi's AI-powered, automated vCISO platform to provide vCISO services at scale - without scaling their existing resources. Cynomi’s multi-tenant platform automatically generates everything a vCISO needs: risk and compliance assessments, tailored security policies, actionable remediation plans with prioritized tasks, task management tools & customer-facing reports


Cybersecurity • Data Privacy
London, England, GB
19 Employees

MIRACL provides the world’s only user-friendly, single step Multi-Factor Authentication (MFA) and Digital Signing service. Secure MFA in 2 seconds. MIRACL Trust® ID blocks 98% of all attacks* and eliminates the need for outdated security practices such as passwords, SMS Texts, push notifications and key-cards. The use of true two-factor authentication coupled with the latest Zero Knowledge Proof (ZKP) technology means no personal data is stored or transmitted and there are no "honey-pots"​ of data exposed to attack keeping MIRACL Trust out of scope for GDPR. MIRACL Trust® Proof allows every user to cryptographically sign any digital asset such as a transaction payment, KYC document transfer, user uploaded content, user action or binding agreement. Usability is paramount, no additional user enrolment steps are required and users authenticate & sign using a simple PIN. Without the requirement for hardware, mobiles or fiddly second steps, your users will love the simplicity and you will appreciate the reduction in support and maintenance overheads. MIRACL Trust® integrates easily into any web or mobile application through a cloud-based service, and has no dependence on client hardware of any kind. Provisioned as a PAYG service at a fraction of the cost of competing hardware solutions or SMS texts, MIRACL Trust® ID can be integrated with any OIDC compliant platform such as ForgeRock, WSO2, Okta and Auth0 just to name a few. Capable of scaling to millions of users overnight, a combination of usability, security and cost make it possible to deploy strong MFA to large B2C networks where it was previously impossible or impractical. Learn more at: www.miracl.com * Calculated from the 2019 Verizon Data Breach Investigations Report, based on Man-in-the-Middle, Phishing and Credential Stuffing (bot) attack frequencies recorded in 2018.


Cloud • Security • Cybersecurity
London, England, GB
26 Employees

A super scalable way to find and secure all your cloud identities


Mobile • Software • Cybersecurity
London, England, GB
35 Employees

Get your system tested by world-class Strikers and start making cybersecurity part of your development cycle. Strike is a global cybersecurity platform that helps companies be protected by detecting and fixing vulnerabilities in their systems continuously. This is achieved by implementing Pentestings that combine top talent and technology. These tests are performed by Strikers, a global community of world-class ethical hackers that have international recognitions and certifications.


Cloud • Information Technology • Software • Cybersecurity
London, England, GB
13 Employees

We work with companies and organisations around the world on a daily basis. Our clients range from major global financial institutions and professional services firms to leading international retailers and retail brands and from large scale, heavy engineering companies to cutting edge technology companies across the globe. We work collaboratively with your in-house and external teams. Only when we truly understand you will we recommend the most effective security measures to minimise the risks you face. Whether we’re working with a global investment bank or small technology start-up our approach is always the same; our security advice should be straightforward and delivered without drama. Most importantly, that our approach to security should take the specific risks faced by you into account, in the context of your individual circumstances. Whether you have a specific requirement, a question you’d like answered or would just like an informal chat, contact us today to learn more about how our straightforward approach can help you meet your security needs


Cloud • Information Technology • Cybersecurity
Kings Langley, England, GB
235 Employees

Welcome to Aspire Technology Solutions! We are an award-winning IT Managed Service and Cyber Security Provider. We deliver leading technology solutions across cyber security, cloud, connectivity, managed services and unified communications to help our customers drive real business benefits. Our mission is to deliver technology like no other; we are dedicated to putting technology to work to help our customers innovate, become more efficient and grow quicker. We help our customers accelerate their ambitions through inspirational technology and to achieve this, we have a passion for delivering a sensational data-driven customer experience. To make sure we’re on track, we measure our performance using the Net Promoter Score (NPS) global measure. In the past 12 months our score has averaged +82 which is deemed ‘world-class’. At Aspire, we design and deliver innovative IT solutions that drive organisations forward. In a world that’s changing faster than ever, we expect our customers to expect more from their technology.


Cloud • Information Technology • Cybersecurity
7 Offices
294 Employees

Bridewell is a leading cyber security services company that specialises in protecting and transforming critical business functions for some of the world’s most trusted organisations. Its teams of security experts work alongside clients to deliver end-to-end services that solve key business challenges. Bridewell's specialists are highly accredited by major industry bodies and have extensive experience delivering services across cyber security, managed security, penetration testing, and data privacy. Bridewell is headquartered in the UK where they run a 24/7 Security Operations Centre (SOC) and has expanded into the US to further support global clients. Since being founded in 2013, Bridewell has grown rapidly and is now one of the largest cyber security providers.