Top Penetration Testing Services in London
Penetration testing London providers delivering multi-scope engagements across web, mobile, cloud, API, network, and infra, mapped to CVSS v4.0, OWASP Top 10, and CWE/SANS Top 25 with compliance-ready reports and seamless CI-CD and workflow integrations.
Best penetration testing companies in London
Astra Security
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Astra Security is a CREST-approved and PCI ASV-certified penetration testing company dedicated to securing websites and businesses online. Our comprehensive VAPT services cover a broad spectrum of digital assets, including websites, applications, cloud infrastructure, network devices, and emerging technologies like blockchain.
Sec-Ops
SEC-OPS™ offers CREST accredited penetration testing in London, specializing in identifying vulnerabilities in tech, people, and premises with TigerScheme certified experts. Services include web, wireless, and physical testing.
Purple Lattice
Purple Lattice, offers tailored penetration testing services in london to identify and mitigate security threats, helping clients with GDPR compliance and risk management.
Akita
Akita provides top-notch cybersecurity with specialized penetration testing to identify vulnerabilities. Their experts craft tailored plans for effective security enhancement, focusing on both external and internal assessments.
CloudTech24
CloudTech24 is an IT & cybersecurity company that offers award-winning services like penetration testing using CREST-accredited methods. They identify cyber threats through ethical hacking to improve security posture and prevent data breaches.
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Navigating London’s compliance landscape? Secure your systems with Astra’s audit-ready penetration testing.
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The clear winner
Why London-based companies choose Astra
Astra puts your ahead by finding and fixing every single security loopholde
with our hacker-style pentest.
AI-Powered Intelligence
- Run 15,000+ tailored AI test scenarios to your unique app
- Contextual remediation advice at your fingertips
- Continuously improves detection accuracy through context-aware analysis and evolving ML models trained on real-world vulnerability patterns.
Compliance-First Approach
- Audit-ready reports aligned with ISO, PCI, SOC 2, HIPAA, GDPR, OWASP, NIST, and more.
- Expert support to simplify assessments and pass audits faster.
DevOps Integration
- Integrate into CI/CD with GitHub Actions, GitLab CI, Jenkins, Bitbucket, and more.
- Automate scans, send vulnerability alerts via Slack
- Create JIRA tickets, all without leaving your pipeline.
End-to-End, Fully Managed Platform
- Continuous, scheduled scans and pentests for web apps, API, and cloud without manual setup or tuning.
- Expert-tuned accuracy with optimized scanners to reduce false positives.
- Vulnerabilities triaged and mapped to real business impact.
- Auto-generated compliance-grade summaries with remediation guidance and automated rescans for verification.
Pentest Certificate & AI-built Trust Center
- Publicly verifiable certifications with shareable links.
- Demonstrate your security commitment.
- Build client and partner trust.
- Summarize your security posture for easy sharing with customers and auditors
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Loved by 1000+ CTOs & CISOs worldwide
We are impressed by Astra's commitment to continuous rather than sporadic testing.
Astra not only uncovers vulnerabilities proactively but has helped us move from DevOps to DevSecOps
Their website was user-friendly & their continuous vulnerability scans were a pivotal factor in our choice to partner with them.
The combination of pentesting for SOC 2 & automated scanning that integrates into our CI pipelines is a game-changer.
I like the autonomy of running and re-running tests after fixes. Astra ensures we never deploy vulnerabilities to production.
We are impressed with Astra's dashboard and its amazing ‘automated and scheduled‘ scanning capabilities. Integrating these scans into our CI/CD pipeline was a breeze and saved us a lot of time.
We are impressed by Astra's commitment to continuous rather than sporadic testing.
Astra not only uncovers vulnerabilities proactively but has helped us move from DevOps to DevSecOps
Their website was user-friendly & their continuous vulnerability scans were a pivotal factor in our choice to partner with them.
The combination of pentesting for SOC 2 & automated scanning that integrates into our CI pipelines is a game-changer.
I like the autonomy of running and re-running tests after fixes. Astra ensures we never deploy vulnerabilities to production.
We are impressed with Astra's dashboard and its amazing ‘automated and scheduled‘ scanning capabilities. Integrating these scans into our CI/CD pipeline was a breeze and saved us a lot of time.
Frequently asked questions
In London, key compliance standards include GDPR/Data Protection Act 2018, PCI DSS for payment data, ISO 27001 for information security, and NIS Regulations for critical services. Healthcare providers follow the NHS DSPT, while finance firms may need to use SWIFT CSP. These frameworks often require or strongly recommend regular penetration testing.
The cost of penetration testing in London varies widely, typically ranging from £3,000 to £20,000 depending on scope, complexity, and business size. Factors include the number of systems tested, the depth of testing, and whether compliance-driven reports are needed. Enterprise-level assessments or red team engagements cost significantly more.
When choosing a penetration testing company in London, look for CREST or CHECK accreditations, proven experience in your industry, and transparent methodologies. Consider how detailed their reporting is, whether they provide remediation guidance, and their ability to align tests with your compliance needs, such as PCI DSS or GDPR.
Penetration testing for London businesses can take anywhere from a few days to several weeks, depending on scope and complexity. A small web application test may require 3–5 days, while a large corporate network or red team engagement could run several weeks, including reporting and remediation validation phases.
Most penetration testing for London companies can be performed remotely, especially for web applications, APIs, and external networks. Onsite testing may be required for internal infrastructure, wireless networks, or highly regulated environments like finance or healthcare. Many firms offer a hybrid model to balance convenience with compliance requirements.
