TOP 15 Cybersecurity Companies In London

ISTARI is a new kind of cyber risk management company. We’re an agile collective of best-in-class capabilities and experts, who build ongoing partnerships with clients. A Temasek company, our aim is to build cyber resilience and the long-term success of your business.

We integrate the market on your behalf, designing and managing a collaborative response from the most relevant companies in our portfolio to solve your cyber resilience challenges.

Innovation is at the core of Exponential-e, and has been since our inception in 2002. We wholly own our superfast Network, and our fusion of complementary technologies - a carrier-class Network and Cloud infrastructure - means we can deliver enterprise applications at wire speed for a superior end-user experience.

Technology is the beating heart of your business, and is undoubtedly fuelling your growth and sustaining your competitive advantage. What you don’t need is the complexity that comes with multiple service providers and varying service levels. At Exponential-e, we strive to constantly exceed expectations in innovation and service; what’s more we can provide a single end-to-end SLA.

At Exponential-e, our Cloud services do not transcend the public Internet. Instead, they reside on a customer's LAN, on the clean side of the firewall, so security and privacy concerns are negated.

Texial Cyber Security - (A unit of Texial Innovations Private Limited )

Texial Cyber Security is the leader in information security training and Consultancy where we focus on integrated cybersecurity solutions for your business with the best cyber security assessment and consulting.

Crossword Cybersecurity is a technology commercialisation company focusing exclusively on the cyber security sector.

We work with research intensive European university partners to identify promising cyber security intellectual property ("IP"​) from research that our industry partners tell us meet emerging real-world challenges.

Our software development team is dual-located in Kraków and Richmond. The team work on a range of products, encompassing Blockchain, Machine Learning, AWS and Kubernetes. The office in Kraków (which houses c.15 staff) can be found within walking distance of Mogilska roundabout and Galeria Krakowska.

Disclosure Cybersecurity Ltd is a specialist cyber security company, formed by professionals with extensive experience and wide exposure in the cyber security market.

We have the breadth and depth of experience to think differently about what really needs to change in a cyber security environment to make our clients more secure, and most importantly we have the proven ability to implement this change.

Mnemonic helps businesses manage their security risks, protect their data and defend against cyber threats.

Our expert team of security consultants, product specialists, threat researchers, incident responders and ethical hackers, combined with our Argus security platform ensures we stay ahead of advanced cyberattacks and protect our customers from evolving threats.

Acknowledged by Gartner as a notable vendor in delivering Managed Detection and Response, threat intelligence and advanced targeted attack detection, we are among the largest IT security service providers in Europe, the preferred security partner of the region’s top companies and a trusted source of threat intelligence to Europol and other law enforcement agencies globally.

Cyber Security Provider Delivering Comprehensive Penetration Testing & Managed Security Services Both Direct & Via Our Partner Program.

We are CREST-accredited and have a focus on penetration testing and improving the cyber security posture of organisations across the UK. Our SOC is operated from our global office locations and was established to deliver logical and effective resilience towards cyber attacks wagered against organisations in the UK.

Founded in 2015 and headquartered in London UK, Cyber Management Alliance Ltd. is a recognised independent world leader in Cyber Incident & Crisis Management consultancy and training.

The organisation is renowned globally as the creator of the flagship Cyber Incident Planning and Response course certified by the UK Government’s National Cyber Security Centre. The CIPR is the only certified course in the world that addresses strategy and planning for non-technical middle to senior management.

Our global leadership in incident response, CSIRT and Security Operations and our satisfied client base puts us in a unique position to offer the best, up-to-date advice and guidance to our clients.

Founded in 2015 and headquartered in London UK, Cyber Management Alliance Ltd. is a aAssured Cyber Protection is a global technology partner empowering organisations to protect their most valuable assets, people, and data from cyber-attacks enabling resilient and sustainable business.

Assured Cyber Protection is a globally established cyber technology company specializing in risk evaluations and next-generation protective monitoring services, intelligently connecting people, processes, and technology. Our offerings pair cutting edge technologies with certified security personnel with decades of industry experience.

With a twenty-year premium of expertise, we access, develop and manage cyber security threats, being trusted by some of the world’s leading finance and banking organisations.

Businesses have to constantly adapt, and we understand that. Our team of accredited professionals provide real solutions that mitigate and respond to risk - in an ever-changing landscape.

Headquartered in London, UK - and as a NCSC CHECK, CREST and PCI certified company - we’re committed to tailoring our approach to each business while taking into account it's level of maturity.

OCISO offers Remote and Virtual CISO Services to Businesses and ISO 27001 and Cyber Essentials Plus certification advisory services

OCISO is a trading style of Cyber Security Helpdesk Limited. Registered in England and Wales. Registered Company No. 10275343

Fortis provides many services which can help organisations to identify where their risks lie. This can be from a technology standpoint to identifying the minute points where illicit access could be made. These are also compliant to audit frameworks which regulatory bodies require. Our consultants are experienced, certified (CREST, OSCP & Tigerscheme) and test in accordance with industry best practices such as CREST, CHECK and PCI-DSS. On completion you will receive a comprehensive report detailing risk and recommendations to reduce that risk.

JAW Consulting UK is a leading provider of Cyber Security, Data Protection & Privacy Consultancy and Resourcing services.

We offer a range of services including Penetration Testing, Cyber Security Risk Assessment, Cyber Security Strategy & Architecture, PCI DSS, ISO27001, EU GDPR, UK DPB and other internationally recognised standards.

This vision is executed by working with customers to understand their business needs and tailoring industry good cybersecurity practices to their risk profile. We never ask a customer to implement more security controls than is needed given known circumstances. And while we cooperate with selected key partners, our advisory services are technology agnostic and impartial.