CREST-accredited consultancy, York
Attackers do not stop at the edge of one technology. We scope the whole attack surface, test in the order an adversary would move and show you how far they could get, what they could reach and what to fix first.
A penetration tester replies within one working hour to ask the questions needed to scope your engagement.
An attack path across six points of an organisation's attack surface. Internet, applications, people and identity, cloud, internal network, business-critical systems. A pulse travels the route from the internet to the business-critical systems.
01 / 06stage
Reconnaissance starts with every host, domain, certificate and login page exposed to the internet. We map them before testing where they lead.
Tested by: External perimeter test02 / 06stage
Web applications and APIs are designed to be reachable. We test how a flaw in one could become the foothold for a wider attack.
Tested by: Web attack surface test03 / 06stage
A phished, reused or stale credential can turn an outsider into a trusted user. We test where that identity can go next.
Tested by: Internal enterprise test04 / 06stage
The same identity may unlock Microsoft 365, cloud services, email and files. We test whether misconfiguration turns access into wider control.
Tested by: Continuous penetration testing05 / 06stage
Once inside, an attacker can move between hosts and escalate privileges towards domain control. We test how far they can travel and what would stop them.
Tested by: Internal enterprise test06 / 06objective
Finance systems, customer data and backups are often the objective. We use the potential business impact to prioritise remediation.
Tested by: Engagement designHow we scope
We design every engagement around your organisation's attack surface, security priorities and objectives. Rather than assessing technologies in isolation, we consider how weaknesses across different systems and services could be combined to create realistic attack paths, helping you understand the risks that matter most.
We define the assurance boundary by considering what an adversary can discover and reach, rather than relying solely on an existing asset inventory.
We do not stop at identifying a weakness. We test what it enables, where it leads and which other findings make it more serious.
We prioritise remediation by the access and business impact a finding creates, not by a scanner score alone.
When your estate changes, we show what has altered, how exposure has shifted and where further testing is worthwhile.
// the four claims every engagement is built on
Our services
Each penetration test starts with the attack surface an adversary can reach. We test in the order they would move, validate each weakness and report what it could mean for your organisation.
Your external attack surface mapped across exposed infrastructure, applications, cloud services and identity, then tested within an agreed scope.
External penetration testing// 02Attack paths available from a representative user and device position across identity, endpoints, networks, applications, SaaS and cloud services.
Internal enterprise penetration testing// 03Your applications and APIs as one surface rather than one app at a time. The flaw that matters is found, then followed to what it reaches.
Web application testing// 04Start from an agreed compromise scenario and assess whether preventative, detective and response controls identify and contain realistic attacker activity.
Assumed breach testingThe settings and hardening baselines a system ships with, reviewed before it reaches production: the weaknesses attackers look for first, found while they are still cheap to fix.
System configuration assurance// 02An active attack is simulated while your defenders watch it happen: the exercise measures what your detection and response actually catch, not what a report says they should.
Purple teaming// 03Monitor agreed exposure and bring human testing into releases, access changes and new services without waiting for the next annual assessment.
Continuous penetration testingA.R.T. works alongside our penetration testers to investigate application weaknesses and connect them into verified attack paths.
AI-assisted penetration testing with A.R.T.// 02The assistant, chatbot or agent you put in front of clients or staff, tested the way an attacker would try to misuse it: what it is told, what it reads and what it can do.
AI application security testingWhy Adversify
Adversify is built around four principles: define the right scope, test realistic attack paths, assess the whole attack surface and focus every engagement on useful outcomes.
Good testing starts with the right scope. We take time to understand your environment, exposure and priorities before designing an engagement around your organisation.
We focus on vulnerabilities and misconfigurations attackers can exploit in practice, then follow them through the attack paths they create so the report centres on what matters.
We assess the attack surface as a connected whole. That means testing the joins between systems, identities and services where an attacker can move.
We agree the deliverables before testing begins and adapt the work to what we find, so the engagement remains focused on the security outcomes your organisation needs.
Our CREST accreditation and industry-recognised certifications reflect the technical expertise behind Adversify. Every engagement is led by experienced penetration testers, with a focus on thorough testing, clear reporting and meaningful security outcomes.
Meet the experts
Co-founder
Co-founder and Senior Penetration Tester
Dan is a senior penetration tester and offensive security consultant with over a decade of experience in cyber security. Beginning his career in a specialist police cyber crime unit, Dan went on to work for several security consultancies, delivering hundreds of penetration testing engagements across a wide range of industries and environments. His technical expertise lies in enterprise security, with a particular focus on Active Directory, Microsoft Entra ID, infrastructure and network penetration testing. He has a keen interest in understanding how weaknesses across different technologies can be combined to create real-world attack paths.
Co-founder
Co-founder, Senior Penetration Tester and AI Innovator
Rish has spent over a decade in offensive security, across red teaming and application and infrastructure testing, and more than five years leading the teams that do it. He has led CBEST red team engagements for major UK banks, gained multi-vector control of one of the UK's largest telecoms providers and built a deep specialism in payment systems security. He tests by attack surface and by what an attacker actually wants, not by technology boundary or checklist, and builds his own multi-agent AI tooling that takes a codebase apart to hunt for vulnerabilities.
Lead Penetration Tester
Lead Penetration Tester
Gillian has worked in offensive security since 2019, delivering penetration testing and incident response engagements for organisations across a wide range of industries. An OSCP and CRT certified tester, she specialises in internal infrastructure, web applications, APIs and social engineering, and has previously held leadership roles bridging technical delivery and client relationships. She believes effective penetration testing goes beyond identifying vulnerabilities and delivering a report. By working closely with clients to understand their environments, explain findings in plain language and support remediation, she ensures security testing is a collaborative process that delivers meaningful improvements rather than just a list of risks.
Penetration Tester
Penetration Tester
Alasdair came to penetration testing through bug bounties and responsible disclosure, reporting vulnerabilities to Microsoft and NASA, including CVE-2026-20841 in Windows Notepad. At Adversify he tests web applications and APIs, combining hands-on manual testing with AI-assisted tooling to cover more ground. Clients can expect thorough testing, clear evidence and reporting that turns findings into action.
Clients
Dan asked really relevant questions to obtain all the information he needed to provide us with a very thorough Pen Test. He worked really well with myself and the IT team at HSL and easily explained the findings in the report and steps on remediation.
From the very first conversation, his communication was clear, responsive, and tailored to the needs of an SME. He took the time to understand our requirements, explained the process in plain terms, and kept us updated at every stage.
Adversify recently conducted a comprehensive internal penetration test for our organisation, and the results exceeded our expectations. The team demonstrated exceptional expertise, thoroughly assessing our systems while maintaining a collaborative and professional approach throughout the process.
Blog
Questions
From understanding how penetration testing works to scoping, pricing and reporting, we answer some of the questions organisations commonly ask when considering a security assessment.
We take an attack surface-led approach, designing engagements around your organisation's environment, objectives and security priorities. Rather than assessing technologies in isolation, we establish meaningful assurance boundaries and investigate how weaknesses across different systems could combine to create realistic attack paths. This helps provide a more complete picture of your security.
Vulnerability scanning uses automated tools to identify potential security weaknesses. Penetration testing goes further, combining automated techniques with human investigation to validate vulnerabilities, uncover weaknesses scanners may miss and assess their potential impact. Where appropriate, our testers also investigate how individual weaknesses could be combined into attack paths.
The cost depends on your environment, the agreed scope, testing objectives and the depth of testing required. Our penetration testers work directly with you to understand your requirements and design an appropriate engagement. We then provide a fixed-fee proposal outlining the scope, approach and deliverables, so you know exactly what to expect.
Your engagement is delivered by experienced penetration testers who remain involved throughout scoping, testing and reporting. You'll work directly with the technical consultants responsible for your assessment, ensuring continuity, clear communication and accountability from start to finish.
You'll receive a detailed report containing an executive summary, evidence-backed technical findings, risk ratings and actionable remediation recommendations. We'll also walk you through the results, helping you understand the potential business impact and prioritise the improvements that matter most. Remediation testing can be arranged separately.
We plan every engagement to minimise the risk of disruption. Before testing begins, we agree the assurance boundaries, testing windows, exclusions and rules of engagement. Potentially disruptive activities are assessed in advance, with appropriate safeguards and communication throughout testing.
Speak to an expert
A penetration tester, not a salesperson, replies within one working hour to understand your priorities and scope the engagement. We quote against that scope because no two environments or testing objectives are the same.
