The Top 15 Cyber Security Companies in London

The realm of cyber security is vast. As the world becomes more interconnected, the threats to data security multiply. Each new connection is a potential gateway to malicious intruders. Depending on the profile and needs of your business, you may need specialist protection alongside a well-rounded cyber security company like EC-MSP. According to the well regarded Cybersecurity 500 list, London is the 7th biggest city in the world for cyber security ventures. While the US may have a larger reputation for cyber security, having locally based support can make all the difference.

We’ve compiled a list of top cyber security companies in London and the UK, and grouped them by their specialisation to help you find what you’re looking for.

What to look for in a cybersecurity company

Bringing cyber security on board is an important exercise for your organisation, especially if you want to elevate how your IT systems run and add extra safety to your organisation and your client’s data. 

When you look for cyber security companies in London, you need to ensure they are reputable by looking at the following characteristics. 

  • The company’s experience. Good London cyber security companies have experience dealing with clients across varying industries. It’s more likely they will have the knowledge you need to enhance and maintain your company’s cyber security systems. 
  • Technological sophistication. In a world where technology is constantly on the rise, you want to make sure that the security team you decide to go with has everything you need to ensure you stay up to date with the latest security trends and progressions. 
  • Qualifications, certifications and licences. You must ensure that the cyber security company you go with has all the correct certifications to implement the software and digital infrastructures you need to get the most out of your cyber security systems.  

The level of support offered to you. How a cyber security company interacts with you as their client will also say a lot about how your working relationship with them will progress. Excellent support and open communication is key in a good cyber security company.

Network Security


BT focusses primarily on telecommunications, but it has also developed a substantial cyber security position. This portfolio is focussed on delivering network based managed security services. They offer the following specialist services:

  • asset oversight
  • threat identification and neutralisation
  • penetration testing
  • fraud defence, including authentication based identity theft
  • continuity planning to prevent DDOS attacks


Another big name, PWC offers network security in two forms: cyber threat detection/response, and cyber security and IT risk identification. They protect critical networks from attack through a combination of preventative and proactive measures for a range of larger scale clients.

Data Loss Prevention


Intellectual property and confidential personal data hold more value than ever before. Storing it securely is an obligation that companies should not be taking lightly. Clearswift are specialists at protecting against data/information leaks. They have developed a suite of products and programs, including the Adaptive Data Loss Prevention tool to assist secure data transfer and storage procedures.


SentryBay have a wide range of partners, including American Express, Check Point, Geico and Barlcays. This diversity in client base reflects the diverse range of offerings this company makes. They do focus on delivering their Data Protection Suite (DPS), but also work with anti-keylogging, mobile security and have an Armoured Browser for banking clients.

Antivirus and Malware Protection, Hacking


This company has been working in the field of cyber security for more than 30 years. They have deep experience and specialisations in antivirus and encryption. Alongside these two areas, Sophos has extended its reach into secure wifi and web and email gateways. Endpoint solutions focussing on device security and the cloud round out their offerings.


Becrypt offers specialisations in endpoint encryption. They work with both Windows and Android operating systems. In addition, they offer iOS mobile device management, USB/port control and thin client technology. Notably they recently launched a tVolution secure client on a USB stick.


This user-friendly interface has been developed to spot weaknesses in internet-facing systems. These weaknesses are gateways for hackers, and Intruder helps clients to fix the issues before they are exploited. The company provides ongoing assessments to ensure the strength of the systems against breaches.


Working with both public and private sectors, Assuria offers managed services across a number of areas. They focus on network traffic monitoring, offer a Cloud Security Suite, provide protective monitoring and web application server security. This robust offering provides protection against both attacks and poor security controls.

Cyber-analytics and Risk Intelligence


Another company that’s been around for a long time, Silobreaker seeks to provide IT departments with digestable, actionable information, filtered through their analytics programs. Analytics is a complex arena and there is constant innovation occurring in the field. The dashboards provided to companies make interpreting alerts simpler. Silobreaker offers both managed and on-premise services.

Acuity Risk Management

Another specialist in risk management, Acuity Risk Management has developed STREAM. This risk management software is used to assess governance, risk and compliance (GRC) by larger companies. Their latest release sees an improvement to custom detailed report generation.


BAE is a big name in defence, and cybersecurity is an obvious extension to this strategy. They provide consulting services to both government and commercial clients. Their main objective is to work with clients in preparing for and managing cyber attacks, and reducing exposure to them in the first instance.


Flying under the radar, Citicus quietly and reliably offers the well-regarded Citicus One platform. It is primarily risk and compliance management software. The platform is flexible and can be used on premises or as a managed service. Over time, Citicus has developed an excellent reputation for it’s ability to visualise risk.


Swivel Secure

Swivel Secure have developed an authentication platform that has reach across most applications. They deploy a two-factor authentication system (using physical tokens), across web, Virtual Private Network (VPN), desktop and cloud applications. The program is a relatively simple one but the benefit is found in it’s versatility an

d ability to be used across diverse platforms and devices.

Device Authority

Device Authority offers extensive security options across a number of platforms. In particular they focus on authentication and encryption across the Identity and Access Management of the Internet of Things. This is an expanding area as more electronics are SMART and are connected to the web. Device Authority also offers end to end security for IoT devices through their own platforms.


This start up also focuses on two factor authentication. They sell hardware to facilitate this, including tokens that generate one time passwords (OTPs). Their system is also offered as a service and can be integrated into larger IT systems. This is a growing area in security as two-factor authentication becomes an industry standard.

Mobile Security


Wandera has a strong pedigree, being started by the founders of ScanSafe back in 2013. This team focuses on mobile security. In particular, their Secure Mobile Gateway is an innovative combination of both cloud and application based security processes. It works by directing web traffic through a proxy, using a mobile app to achieve it’s goals.

About EC-MSP IT Services

EC-MSP are one of the most trusted IT support providers in London. We can offer support and advice about your cyber security policies and other IT support for business. If you would like help with your business IT, please contact us today to see how we can help.