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The Top Cyber Security Companies in the UK

Written by  Feb 25, 2020

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

It's important to know what kinds of services your company needs.

The following cyber security companies vary in size and 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 (shown in alphabetical order).

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).

cyber NewsAlso see: Millions of UK Businesses don't have a Cyber Insurance Policy


Defence, security and aerospace firm BAE offers cyber security to commercial and governmental customers.

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.


The services offered by Becrypt focus on endpoint encryption and protection for enterprise IT and the Internet of Things (IoT).

Its clientele range from governmental bodies to businesses and organisations with critical infrastructure.

Also offering USB/port control, Becrypt additionally managed devices on iOS and Android.

ceh v10Also see: A Guide to Popular Cyber Security Certifications and Training


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 Cyber Defence Operations for larger corporations.

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.


Clearswift specialises in data loss prevention (DLP) and protecting against leaks.

The firm offers companies various products that focus on this issue, including its Adaptive Data Loss Prevention tool, which aids effective data storage and transfer, and SECURE gateways for web and Internet Content Adaption Protocol (ICAP).

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Founded in Cambridge with money from Mike Lynch’s Invoke Capital, Darktrace now claims to be the world leader in cyber AI.

Building a stellar reputation for its Enterprise Immune System, a fully fledged cyber-defence system for spotting anomalies on networks.

The company now protects corporate, cloud and virtualised environments and IoT and industrial control systems, detecting and fighting against any threats across the whole business.

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 cyber maturity accelerator, vulnerability assessments and penetration testing.


KPMG is another leading UK cybersecurity company. The professional services company specialises in financial audit, tax, and advisory services, but also has a substantial cybersecurity offering.

It particularly specialises in security of information, IT systems and industrial control networks and support organisations in analysing security vulnerabilities, protecting the company through increasing the level of security and acting quickly in the case of a security breach.

cyber codeAlso see: UK Cyber Security is Booming

PricewaterhouseCoopers (PwC)

Professional services provider PwC offers two forms of network cyber security: IT risk identification and security, and cyber threat detection and response.

Services include rapid risk reduction, compromise discovery assessments and crisis management.

PwC adopts both proactive and preventive approaches in order to protect the networks of larger companies.


SentryBay are a DLP company offer its services to a variety of industries, from financial services to insurance.

Its Data Protection Suite (DPS) is a prominent feature, but the company’s capabilities also include anti-keylogging and mobile security.

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Made its name in business and network analytics. In cybersecurity, the firm’s software can automate the process of trawling through large numbers of data feeds.

Including social media, websites and news – to deliver reports on any security topic from specific attack types to known groups that might be of interest to a business.


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

While the company also offers products for cyber at home, the business-orientated services that Sophos offer include endpoint protection, firewalls and protection for the cloud.

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