CREST-Certified Penetration Testing Services in the UK
Independent penetration testing delivered by CREST-certified ethical hackers. Our UK-based pen testing team identifies exploitable vulnerabilities across networks, infrastructure and applications.
- CREST-certified penetration testers
Trusted UK penetration testing provider
Clear reporting and remediation guidance
Trusted by organisations across regulated industries including finance, healthcare, SaaS, and critical infrastructure.
Penetration Testing Services From OmniCyber
Our penetration testing services help organisations identify security weaknesses before attackers exploit them.
Using a structured security testing methodology, our testers simulate real-world attack techniques to assess how well your systems, applications and infrastructure withstand compromise.
We provide pen testing services across the UK, supporting organisations that need assurance, compliance validation, or an independent assessment of their cyber security posture.
When Do You Need Penetration Testing?
Most organisations eventually need to prove their security controls actually work. A professional penetration test provides independent validation that your systems can withstand real-world attack techniques.
You may need penetration testing services if you:
- Have invested heavily in cyber security and want to validate its effectiveness
- Are preparing for a compliance audit or security assessment
- Manage systems or data that carry significant business risk
- Have changed infrastructure, applications, or access controls
- Need an independent security testing provider to review your defences
Whatever the driver, the goal is the same. You need penetration testing carried out by experienced ethical hackers, using realistic attack techniques, with results you can trust to make informed security decisions.
A Trusted Approach To Penetration Testing
Our Penetration Testing Methodology
As an experienced penetration testing provider, OmniCyber follows a structured and transparent methodology aligned with recognised security testing standards. Our CREST-certified penetration testers combine automated analysis with expert manual testing to simulate how real attackers identify and exploit vulnerabilities.
- Scoping and Context We define the scope of your penetration test, including critical systems, applications, and infrastructure. This ensures testing focuses on the assets that matter most to your organisation.
- Realistic Attack Simulation: Testing is conducted manually by certified ethical hackers using modern security testing techniques that reflect real-world attack behaviour.
- Privilege Escalation and Lateral Movement: Where vulnerabilities are discovered, our testers assess how an attacker could escalate privileges, access sensitive systems, and move laterally within your environment.
- Risk-Based Reporting: All findings are prioritised according to likelihood of exploitation and potential business impact, helping your team focus remediation efforts effectively.
- Remediation Support: Clear remediation guidance is provided for every vulnerability, with optional retesting available to confirm fixes.
Let Us Help You Today.
Our Penetration Testing Services
OmniCyber provides a full range of penetration testing services in the UK, helping organisations identify vulnerabilities across networks, applications, and infrastructure. Our CREST-certified penetration testers perform manual testing designed to simulate how real attackers identify and exploit weaknesses.
Network penetration testing
Evaluates internal and external network security controls, including firewalls, servers, endpoints, and network configurations.
External Penetration Testing
Simulates attacks from outside your organisation to identify exposed internet-facing services, infrastructure vulnerabilities, and configuration weaknesses.
Internal Penetration Testing
Simulates an attacker who has gained internal access to your network to identify opportunities for privilege escalation, lateral movement, and access to sensitive systems.
Attack simulations
Simulate real-world attacks to identify how an adversary could gain access to your network and move across systems.
Web application pen test
Assess web applications for vulnerabilities that could lead to data exposure or service disruption.
Mobile application penetration testing
Tests mobile applications for vulnerabilities such as insecure authentication, sensitive data exposure, and logic flaws.
Hosting configuration testing
Review host and operating system configurations attackers commonly exploit.
Firewall configuration testing
Identify unsafe firewall rules and provide clear recommendations.
Wireless network security testing
Assesses wireless networks for weaknesses that could allow attackers to gain unauthorised access to corporate systems.
Penetration Testing for Compliance Frameworks
Many organisations require penetration testing services to meet security and regulatory requirements. OmniCyber supports organisations preparing for or maintaining compliance with recognised security frameworks.
This includes:
- ISO 27001
- Cyber Essentials Plus
- PCI DSS
- NHS DSPT
- DORA
- GDPR security risk assessments
Our CREST-certified penetration testing helps organisations validate that security controls are working effectively and provides evidence required for compliance and assurance.
Penetration Testing for Multiple Industries
OmniCyber delivers penetration testing services in the UK for organisations across a wide range of sectors. Our penetration testers understand the security challenges and regulatory requirements faced by different industries.
This includes:
- Financial services
- Healthcare and life sciences
- SaaS and technology platforms
- E-commerce businesses
- Charities and non-profits
- Professional services
- Critical infrastructure providers
Each penetration test engagement is scoped to reflect the systems, risks, and regulatory requirements specific to your organisation.
What You Receive From A Penetration Test
A professional penetration test should provide clear insight into how attackers could compromise your systems and what actions should be taken to reduce risk.
This includes:
- Clear evidence of exploitable vulnerabilities
- How attackers could gain and escalate access
- What systems or data would be exposed
- Which controls fail under pressure
- What to fix first, prioritised by risk
- Clear reporting for technical and non-technical stakeholders
These insights are delivered in a structured report that places vulnerabilities in context, allowing your organisation to prioritise remediation and make informed security decisions.
What is CREST Penetration Testing?
CREST is a recognised accreditation body for cyber security professionals and penetration testing providers. A CREST penetration test ensures testing is carried out by qualified ethical hackers using recognised industry methodologies.
Working with a CREST-certified penetration testing provider gives organisations confidence that testing is performed to professional standards and is suitable for regulated or high-risk environments.
Why CREST certification matters:
- Independently assessed penetration testers
- Recognised industry testing standards
- Trusted for compliance and regulated sectors
- Professional security testing and reporting
A CREST-Certified Penetration Testing Company You Can Trust
Penetration testing only delivers value when it is performed responsibly, consistently, and to recognised professional standards.
These standards help ensure testing is accurate, ethical, and suitable for organisations operating in regulated or high-risk environments.
What Our Clients Say About Our Services
Organisations across multiple industries trust OmniCyber to deliver professional penetration testing and clear security insights.
“What stands out most is the feedback I hear after introducing others to OmniCyber. They consistently say the team are the best penetration testers they have worked with because they work with you, not just against your systems.”
Global Travel Company
Head of Security
“Your report is the most detailed and practical we have reviewed. The level of clarity and prioritisation made it easy to understand what needed attention.”
Healthcare Industry
DevOps Manager
“The work and interactions (with Louie Augarde in particular) were so impressive we wouldn’t even consider tendering elsewhere at this point.”
UK Registered Charity
IT Infrastructure Manager
Meet Our Expert Penetration Testing Team
Our penetration testing team is made up of highly certified experts, selected for their real-world experience and commitment to staying current with modern attack techniques.
- Senior penetration testers with hands-on delivery experience
- Certified ethical hackers holding CREST, OSCP, and related credentials
- Ongoing training and certification programme
- Testing conducted in line with recognised ethical and industry standards
- Peer review and quality assurance on all findings
This ensures every penetration test is delivered by experienced professionals who prioritise accuracy, reliability, and responsible security testing.
A Trusted Approach To Penetration Testing
Why Choose OmniCyber as Your Pen Testing Provider?
OmniCyber is an established UK cyber security company, founded in 2015, with a proven track record of delivering penetration testing services for organisations operating in regulated and high-risk environments.
We work with both global enterprises and SMEs, providing security testing that supports compliance, assurance, and real-world risk management.
Clients choose OmniCyber because we deliver penetration testing that is thorough, reliable, and tailored to their environment.
- Highly certified testers chosen for technical skill and sound judgement
- Ongoing investment in training to stay current with modern attack techniques
- Clear, risk-led reporting prioritised by criticality and business impact
- Proven delivery across diverse and regulated environments
- Trusted by organisations protecting sensitive and high-value data
If you are comparing pen testing companies, experience, care, and clarity matter far more than price alone.
Penetration Testing Pricing & Quotes
Penetration testing costs vary depending on the scope, complexity, and systems being tested.
To ensure accurate pricing, we provide scoped penetration testing quotes based on:
- The goals of the penetration test (compliance validation, security assurance, attack simulation)
- Testing approach (e.g. black box, grey box, or white box testing)
- Number of systems, applications, or assets in scope
- Internal vs external testing scope
- Infrastructure complexity and technologies involved
- Compliance or regulatory requirements
- Available budget and preferred testing depth
Speak to one of our security specialists to receive a tailored penetration testing quote aligned with your organisation’s testing objectives.