Top Penetration Testing Companies In Manchester For 2027
David Roberts
Founder & CEO - ReVerb
10.30.2026
Attackers no longer need weeks to map a network. AI tools now help them scan exposed services, write convincing phishing emails and chain small misconfigurations into a real breach in a matter of hours. For a Manchester business that runs customer portals, cloud workloads or a hybrid office network, the question is not whether someone will probe those systems, but whether you find the weak points first.
Penetration testing is how you find them. A good tester works like an attacker within an agreed scope, proves which issues are exploitable and hands your team a prioritized list of fixes. Manchester has one of the strongest cyber security communities in the UK, so buyers here can choose from global firms, specialist boutiques and compliance-focused consultancies without leaving Greater Manchester.
This list covers ten penetration testing companies with a verified office in Manchester or the wider metro, ranked on the depth of their testing services, their accreditations and how well they fit different buyer needs. Where a firm holds CREST accreditation, we say so. If you also need managed detection, consultancy or certification support, our broader roundup of the top cyber security companies in Manchester is a useful companion.
Manchester Penetration Testing Companies At A Glance
Web app, infrastructure, mobile, cloud and red team testing
Digital Interruption
Manchester, UK
Software and app development teams
Web, mobile, API and network testing, code review
EmergeCyber
Manchester, UK
Businesses wanting continuous testing
Continuous network and application testing, digitalCISO platform
CYFOR Secure
Middleton, Greater Manchester, UK
Firms that want testing and forensics under one roof
Penetration testing, incident response, digital forensics
Best Penetration Testing Companies In Manchester For 2027
1. NCC Group — Global Technical Assurance Run From A Spinningfields HQ
NCC Group lists its global headquarters at the XYZ Building in Spinningfields, which makes it the largest testing firm actually based in the city. Its technical assurance practice covers penetration testing across applications, infrastructure and cloud, and it sits alongside digital forensics and incident response, managed extended detection and response, and threat intelligence. It is best for large, regulated or multi-site organizations that need one supplier able to test, respond and monitor.
What stands out is breadth and formal standing. NCC Group appears as a CREST member company and is listed by the UK National Cyber Security Centre for CHECK penetration testing, the scheme used for government and public sector work. Buyers in finance, government or critical services who need a tester that procurement teams will recognize will find NCC Group an easy firm to approve. Smaller businesses should expect enterprise-style scoping and plan for that in the timeline.
2. Secarma — AI And LLM Application Testing Alongside Cyber Essentials Certification
Secarma is registered in Manchester at Birley Fields in Hulme. Its testing menu covers web applications, mobile apps, infrastructure, wireless and cloud, plus build, cloud configuration and firewall reviews. It also tests AI integrations, AI agents, chatbots and LLM applications, which is still rare among regional firms. Red teaming, objective-led testing and adversary simulation round out the offensive side.
Secarma is a good fit for mid-market companies that want testing and certification from the same team. It is a Cyber Essentials and Cyber Essentials Plus certification body, holds ISO 9001 and ISO 27001, displays CREST accreditation and lists NCSC Assured Service Provider status. Advisory work such as ISO 27001 gap analysis, vCISO support and threat modelling means findings can feed straight into a security program rather than sitting in a report.
3. Predatech — CREST-Accredited Testing With A Year-Round PTaaS Option
Predatech is a CREST-accredited consultancy based at Spring Gardens in Manchester city centre. It offers in-depth manual penetration testing of networks, applications and cloud systems, and assessments are carried out by IASME and CREST qualified professionals. It also provides managed vulnerability scanning, including PCI ASV scans, and Cyber Essentials certification.
The standout option is Penetration Testing as a Service, which combines automated and manual techniques throughout the year instead of a single annual test. That suits SMEs and growing software firms that ship changes often and want issues caught between formal assessments. Buyers who need a CREST report for a client or insurer, but do not want an enterprise-sized engagement, will find Predatech a practical choice.
4. Cyphere — AWS, Azure And Google Cloud Testing Plus Office 365 Review
Cyphere is based at Kennedy House in Altrincham, Greater Manchester, and states that it is fully accredited by CREST for penetration testing. Its testing covers internal and external networks, including firewalls, VPNs, DNS, wireless and Active Directory, along with web applications, APIs, SaaS platforms and iOS and Android apps tested on real devices.
Cloud is where Cyphere is strongest for many buyers. It tests AWS, Azure and Google Cloud environments and reviews Office 365 setups, which covers the stack most UK SMEs and SaaS companies actually run. It also offers red teaming and compliance-linked testing for PCI DSS, ISO 27001 and GDPR, and it is an IASME certification body for Cyber Essentials Plus. It is a strong pick for cloud-first businesses that want one tester across infrastructure and applications.
Cyber Security Specialists is based at Altrincham Business Park. The company says it is accredited for CREST, Cyber Essentials Plus, ISO 27001, ISO 9001 and Defence Cyber Certification, and that it supplies the UK Government. Its testing services include CREST-aligned penetration testing, threat-led testing and red teaming.
The firm suits organizations that want testing tied to ongoing protection. Beyond testing, it runs a managed SOC, vulnerability scanning, dark web monitoring, virtual CISO and virtual DPO services, awareness training and incident response. That means findings from a test can be tracked and monitored by the same team afterwards. For defence suppliers working through new certification requirements, its Defence Cyber Certification accreditation is a useful extra.
6. Bridewell — CREST-Accredited Testing With Offices Across The UK And US
Bridewell has a Manchester office at Spring Gardens, alongside offices in Reading, London, Cardiff and Edinburgh in the UK and Houston and New York in the US. It is a CREST-accredited firm, and it pairs penetration testing with managed detection and response and security consultancy. That mix fits larger organizations and operators of critical services that want testing, monitoring and advisory from a single supplier.
What stands out is scale with a local presence. A Manchester team can handle on-site work such as internal network or physical testing, while the wider firm brings capacity for larger or multi-country programs. Buyers who already rely on Bridewell for monitoring often find it simpler to keep testing in the same relationship. Smaller firms should confirm the minimum engagement size early.
RM Information Security is based at No.1 Circle Square on Oxford Road. It tests web applications, external infrastructure, mobile apps and cloud environments, and it offers red team testing, information security consultancy and a website security health check. It holds ISO 27001 and ISO 9001 certification.
Rather than CREST, RM has chosen The Cyber Scheme as its preferred penetration testing certification, and its consultants hold the Cyber Scheme Team Leader (CSTL) Web Application qualification. That makes it a sensible choice for businesses whose main exposure is a customer-facing web application or portal. The website security health check is a lighter starting point for organizations that have never commissioned a test and want to see where they stand.
Digital Interruption works from Colony at Piccadilly Place in central Manchester. Its testing covers web applications, mobile apps, APIs and networks, and it also provides vulnerability scanning, code review, cloud review and secure development consultancy. The firm publishes a penetration testing guide for buyers, which helps teams that are commissioning a test for the first time.
Digital Interruption is a natural fit for software companies and in-house development teams. Its focus is on finding real risks and giving clear fixes with evidence, and engagements include a free retest so you can confirm remediation worked. Combined with code review and secure development support, that helps teams fix the root cause in their build process instead of patching the same class of bug every year. Testing can also be delivered remotely.
9. EmergeCyber — Continuous Testing Results Tracked In The digitalCISO Platform
EmergeCyber is based at Adamson House on Towers Business Park in Didsbury. It runs network penetration testing to check whether an attacker could break in, and application penetration testing to find weaknesses in your own software. Its wider offering includes continuous data protection, threat intelligence and a secure network-as-a-service platform.
The difference is how results are delivered. Findings appear in digitalCISO, the company’s own platform, with a risk level attached to each one, so leadership can track exposure over time rather than reading a static PDF once a year. The firm also shows a CREST Pathway badge linked to a public Credly record. EmergeCyber suits small and mid-sized businesses that want ongoing visibility and a simple way to report security status to directors.
10. CYFOR Secure — Penetration Testing Backed By Digital Forensics And Breach Response
CYFOR Secure operates a secure operations site in Middleton, Greater Manchester. Penetration testing sits within its proactive services, next to audits, Cyber Essentials, ISO 27001 support, vulnerability scanning, phishing simulation and managed endpoint protection. The company displays ISO 9001, ISO 14001 and ISO 27001 certification.
Where CYFOR Secure stands out is the reactive side. It offers incident response, digital forensics, ransomware negotiation support and breach remediation, which is useful if a test is part of recovering from an incident or preparing for one. Organizations in legal, insurance or regulated sectors that want testing and forensic capability from one provider should put it on the shortlist, and confirm the scope of the testing service directly since public detail is limited.
How To Choose A Penetration Testing Company In Manchester
The right tester depends on what you need to prove, to whom, and how often your systems change. These questions will help you narrow the list.
Do I Need A CREST-Accredited Tester?
If a customer, insurer, regulator or public sector buyer asks for evidence of testing, CREST accreditation is the safest answer because it is widely recognized in UK procurement. For government work, check whether CHECK status is required. If your need is internal, other schemes such as The Cyber Scheme are also credible, so judge the individual testers’ qualifications and sample reports rather than logos alone.
What Should Be In Scope For My First Test?
Start with what an attacker can reach from the internet: your external network, customer-facing web applications and APIs, and your cloud and Microsoft 365 configuration. Add internal network testing if you have an office network or Active Directory. If your main risk is a single application, a focused web application penetration test often delivers more value than a broad but shallow assessment.
How Much Does A Penetration Test Cost?
Cost is driven by scope and tester days, not by the firm’s size alone. A small external test can be a few days of effort, while a multi-application or red team engagement can run for weeks. Ask each supplier for a day count and a breakdown of what each day covers. Our guide to penetration testing cost explains the main pricing factors in more detail.
Should I Choose A One-Off Test Or Continuous Testing?
A one-off annual test works for stable environments and compliance deadlines. If you release software weekly or change cloud infrastructure often, continuous testing or PTaaS catches issues between formal tests. Several firms on this list offer both, so you can start with a single test and move to a subscription once remediation is under control.
Do I Need A Penetration Test Or A Red Team Exercise?
A penetration test finds as many weaknesses as possible within a defined scope. A red team exercise tests whether your people and detection tools notice a realistic, goal-driven attack. Most organizations should run penetration tests first and consider red teaming once they have monitoring in place. Our explainer on red teaming vs penetration testing covers the trade-offs.
Conclusion
Manchester buyers do not have to look far for capable testers. NCC Group and Bridewell bring the scale and formal standing that large and regulated organizations need. Secarma, Predatech, Cyphere and Cyber Security Specialists combine CREST-accredited testing with certification and managed services for the mid-market. RM Information Security, Digital Interruption, EmergeCyber and CYFOR Secure each offer a clear specialty, from web applications and development teams to continuous testing and forensics. Decide what you need to prove and how often your systems change, ask each shortlisted firm for a sample report and a day-by-day scope, and choose the penetration testing company in Manchester whose testers you would trust to explain findings to your board.
