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Top 5 Penetration Testing Companies in London

Sanjiv Cherian

Sanjiv Cherian, Cyber Security Director
May 01, 2023

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5 Best Pen Testing Companies in London

London has many penetration testing companies, making choosing the best difficult unless you have a guide to help you look in the right direction.

That is why this article lists the top five penetration testing companies in London.

Are you ready to partner with the best penetration testing company in London? At Microminder, we provide comprehensive pen testing services to boost your company's security posture.

Talk to our experts today

What Is Penetration Testing?

Pen test or penetration testing is a method of testing the security of your company's IT system by trying to breach it with the same techniques and tools used by attackers.

In penetration testing, the evaluator mimics real-world attempts used by hackers to identify ways to circumvent or break the security integrity of your web applications, systems or networks. A pen test aims to uncover vulnerabilities such as network, operating system, process and human errors.

Types of Penetration Testing

There are five types of pen testing. Each focuses on different security vulnerabilities and uses a unique tool set. Knowing the various types of pen tests is necessary to find one that suits your needs.

Web App Pen Test

In a web app pen test, the evaluator searches for security vulnerabilities associated with insecure code and flaws in the design and development process. The test focuses on websites, web apps and plugins.

Client-Side Pen Test

Attackers can access a company application through email directing employees to load malware onto a USB that will execute once inserted into a device. Client-side pen tests identify risks within a company's applications and programs, like email platforms and web browsers and provide ways of remediating them.

Network Pen Test

In a network pen test, the evaluator audits a company's network environment for security vulnerabilities. This test can be subdivided into external and internal tests. In an external pen test, the tester will assess the security of public IP addresses. The tester will emulate a hacker who has already gained access to the network defences in an internal penetration test.

Wireless Network Pen Test

Wireless network pen tests focus on finding vulnerabilities in a company's wireless devices, such as laptops, notebooks, tablets and smartphones. The tester will identify all the devices a company uses that are susceptible to vulnerabilities like weak security protocols, access point configuration and wireless devices security control.

Social Engineering Pen Test

In the social engineering pen test, the evaluator focuses on the human aspect of a company's security. The tester will try to deceive the firm's employees into giving up sensitive information. This test will enable the evaluator to understand the company's vulnerability to scams and other social engineering attacks.

Top 5 Pen Testing Companies in London

Microminder Cybersecurity

1. Microminder

Microminder is a CREST-certified cybersecurity company headquartered in London. If you are looking for the best pen testing company in the UK, this cybersecurity firm is worth considering.

Aside from the UK, Microminder has offices in South Africa, India, Dubai and Ireland. Our team brings together seasoned industry experts technically proficient in cybersecurity to eradicate threats and make the digital space safe.

We specialise in offensive and defensive security-based solutions and provide cutting-edge services for small and large companies in the UK.

Our pen testing services simulate real attacks to give you an idea of your business security risk.

  • Identify key vulnerabilities in your network, app and APIs
  • Stay compliant with existing cybersecurity regulations
  • Stop supply chain attacks
  • Fix security patches
  • Prevent threat infiltration
  • Protect your brand reputation

Also, we scan your web and mobile apps, APIs, source code, cloud infrastructure, network and IoT devices for vulnerabilities.

Other cybersecurity services we offer are:

  • Red team operations
  • Scenario-based testing
  • Vulnerability assessment
  • Social engineering

Talk to one of our experts today to learn more about our services!


2. Redscan

Redscan is a penetration testing company in London that provides the vital assistance needed to improve your company's cybersecurity posture. This cybersecurity firm has worked with clients across a range of industries, including finance, legal, retail, transport, healthcare and energy.

As an award-winning CREST-approved pen testing service provider, Redscan will help you identify vulnerabilities and recommend how to fix them before attackers can exploit them.

The pen test checks your:

  • Network
  • Web applications
  • Wireless devices
  • Social engineering
  • Mobile apps

Redscan penetration tests also include post-assessment, where you get a detailed outline of all risks identified and how to remediate them.



JUMPSEC is another CREST-certified pen testing company in London that helps businesses of all sizes to increase their security posture. Its experts simulate the techniques attackers leverage to assess your digital assets' resilience to real-world cyber threats.

Some of the benefits of JUMPSEC pen test include:

  • Guaranteed security of your critical digital systems and assets against malicious attacks
  • Identification and remediation of exploitable vulnerabilities before attackers exploit them
  • Customers trust
  • Compliance with cybersecurity regulations

JUMPSEC services include:

  • Application penetration testing
  • Network penetration testing
  • Physical penetration testing
  • Managed vulnerability scanning
  • Firewall configuration review
  • Code security review
  • Cloud security assessment

4. Akita

Akita is a certified cybersecurity firm that helps businesses protect their IT infrastructure from attacks. It is certified with the international standards ISO 9001 and ISO 27001.

Akita has worked with businesses of all sizes in London, UK, for over 25 years, providing security to prevent and mitigate cyber-attacks.

You can access two types of pen testing services.

  • External penetration testing. This test looks at parts of your company's network, like IP addresses, to prevent unauthorised access
  • Internal penetration testing. This test identifies risks from your company and examines devices or systems connected to your network that someone inside your firewall can attack

5. Teceze

Teceze is a cybersecurity firm that provides pen testing as an ongoing service or a one-off assessment. You can find pen testers with security certifications like GIAC, CISSP and CISM.

Teceze-certified engineers can identify weaknesses in your company's systems and provide recommendations on how to remediate them.

Teceze services include:

  • Web application penetration testing
  • Phishing penetration testing
  • Social engineering penetration testing
  • Wireless network penetration testing


Regular pen testing is the best way to protect your IT infrastructure, keep data safe and comply with cybersecurity regulations. However, you must hire the right penetration testing company to ensure your business data is protected from attackers.

You can choose from several pen testing service providers in London. Always consider the range of cybersecurity services they do, their experience and price before settling for one.

Are you ready to partner with a CREST-certified penetration testing company in London? Talk to Microminder experts today.

Don’t Let Cyber Attacks Ruin Your Business

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  • 40 years of experience: We have served 2500+ customers across 20 countries to secure 7M+ users
  • One Stop Security Shop: You name the service, we’ve got it — a comprehensive suite of security solutions designed to keep your organization safe

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