The top UK cyber security companies

Investing in the right cyber security for your company is more vital than ever, but which are the top UK cyber security companies right now?

The following cyber security companies vary in what services they provide, from what devices or software they cater for, to the kinds of security they offer. Some completely focus on cyber security, and others deal in multiple services, including cyber security.

Looking for the right cyber security provider may depend on the size of your company, or the areas of the company’s system that you feel are the most vulnerable.

With this in mind, let’s take a look at the top UK companies in the space right now.

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LSEG-listed since April 2021, Darktrace is an AI-powered cyber security vendor that aims to intercept cyber attacks in seconds, encompassing ransomware, phishing, and threats to cloud environments and critical infrastructure.

Its services’ core coverage encompasses cloud, email, apps, endpoint and network with a zero trust approach. Products offered include prevention, detection and response tools.

Additionally, its AI Research Centre looks to continue exploring how artificial intelligence can be applied to real-world problems, as well as innovating cyber recovery processes.

Ernst & Young (EY)

Professional services company EY offers cyber security advice to companies of all sizes, from start-ups to established multi-national firms.

The company has teams dedicated to cyber security, strategy, risk, compliance and resilience, and can offer guidance into securing a range of tech, including IoT and cloud.

Cyber security services offered by EY include a cybersecurity program assessment with acceleration toolkit, vulnerability assessments and penetration testing.


Clearswift specialises in data loss prevention (DLP) and protecting against leaks. Its solutions also encompass email and web security, information security and data compliance.

The firm offers companies various products that focus on DLP, including its adaptive data loss prevention tool, which aids effective data storage and transfer, and SECURE gateways for email, web and Internet Content Adaption Protocol (ICAP).

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Telecommunications provider BT offer network-based security in the form of behavioural analytics for guidance.

The company has its own cyber security platform, which protects its customers as well as its own infrastructure, as well as a specialist, state-of-the-art Security Operations Centre.

Specific specialist services that BT offer include asset oversight, threat identification and neutralisation, and continuity planning in the event of future Distributed Denial of Service (DDoS) attacks.

PricewaterhouseCoopers (PwC)

Professional services provider PwC adopts both proactive and preventive approaches in order to protect the networks of business customers. Research and security intelligence, combined with technical expertise, help organisations to minimise cyber risk and increase resilience.

Services include cyber security transformation, defence and detection, response and recovery, and risk advisory. There is also a service dedicated to security of data following mergers and acquisitions.

BAE Systems

Defence, security and aerospace firm BAE Systems offers cyber security to commercial and governmental customers. Its cyber portfolio encompasses enterprise security and national cyber mission processes.

Its services include fraud detection and prevention, incident response and services relating to regulation compliance.

The company focuses on helping its clients to stop cyber attacks from penetrating their systems in the first place using analytics, through its Digital Intelligence arm.

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Data protection specialists Sophos deals in cybersecurity as a service, offering antivirus and encryption, as well as securing Wi-Fi and email gateways.

Its portfolio covers managed detection and response, with customers able to leverage zero trust network capabilities, as well as email and cloud security. Endpoint protection, firewalls and a specific suite for small businesses are also included in Sophos’s offerings.

Acuity Risk Management

Acuity Risk Management analyses and guides larger corporations in dealing with cyber threats.

Risk management guidance is given via its software platform, STREAM Integrated Risk Manager, which features analytics, as well as dashboards and reports.

The services offered by Acuity through STREAM focus on governance, risk and compliance (GRC).


Becrypt focused on endpoint and cloud encryption and protection for enterprise IT and the Internet of Things (IoT). Its products are certified by the National Cyber Security Centre (NCSC).

The company’s customer base ranges from governmental bodies to businesses and organisations with critical infrastructure.

As well as offering secure desktop and cross-domain capabilities, Becrypt also manages devices on iOS and Android.

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SentryBay is a company that offers zero trust protection for hybrid and remote working to a variety of industries, from financial services to insurance.

Its Armored Client platform covers client, enterprise client and cloud, with products helping organisations mitigate screen capture, keylogging and other malware.

Meanwhile, compliance solutions assist firms in meeting the requirements of PCI DSS, HIPAA, GDPR, FFIEC layered security, and internal requirements.


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Aaron Hurst

Aaron Hurst is Information Age's senior reporter, providing news and features around the hottest trends across the tech industry.