Offensivesecuritybuiltforcontinuousassurance
Pentesys is a CREST-approved UK cybersecurity company providing expert-led penetration testing, red teaming and continuous security validation through our Mirage platform. We combine experienced security consultants with automation and AI-assisted technology to help organisations continuously discover, validate and remediate real-world security exposure.
An offensive security specialist, not a general consultancy
Pentesys focuses on one discipline and does it properly: finding, validating and helping fix real security exposure. We do not try to cover every corner of cybersecurity.
Penetration testing
CREST-approved, consultant-led testing across web, API, mobile, network, cloud and wireless.
Penetration testingPTaaS
Testing delivered as an ongoing service, with findings, retests and evidence tracked in one place.
PTaaSCTEM
A continuous threat exposure management lifecycle rather than a single point-in-time report.
CTEMRed teaming
Objective-based adversary simulation that tests detection and response, not just vulnerabilities.
Red teamingAI-assisted testing
Automation and AI widen coverage between engagements; consultants validate what matters.
AI penetration testingAutomation helps us cover more ground, more often. Qualified consultants remain responsible for validating findings, determining exploitability and assessing real-world risk before anything reaches your team.
Discover, validate, remediate, retest, monitor
A continuous lifecycle aligned to CTEM and operated through the Mirage platform, combining automation with human-led offensive security expertise.
01
Discover
Continuous discovery of domains, subdomains, IPs, cloud services and APIs so scope reflects reality.
02
Validate
Consultants test and confirm what is genuinely exploitable, filtering out scanner noise.
03
Remediate
Prioritised, practical guidance with owners, deadlines and evidence tracked to closure.
04
Retest
Fixes are verified and re-scored so you can prove the exposure is actually closed.
05
Monitor
Ongoing monitoring between engagements catches new exposure as your estate changes.
Scanners do not replace penetration testers. They give our consultants more signal to work with, so testing time is spent on exploitation, business logic and risk rather than triage. Read more about how we support CTEM.
The platform behind our continuous security services
Mirage is the Pentesys security platform. It is the technology layer supporting our PTaaS and continuous testing services, giving you one place to see exposure, track fixes and prove progress.
Independently accredited and active in the industry
Our accreditations are verifiable, and we take part in the standards work shaping how security testing is delivered.
CREST AI Charter
Founding signatory of the CREST AI Charter for responsible AI in security testing.
Verify
Cyber Essentials
Certified to Cyber Essentials, the UK government-backed baseline we also help clients achieve.
VerifyPentesys is attending the Gartner Security & Risk Management Summit in London, 22 to 24 September 2026. You can book a meeting with our team at the event.
Summit detailsMore than an annual penetration test
Compare a modern PTaaS programme with a traditional consultancy engagement.
| Capability | Pentesys | Traditional Consultancy |
|---|---|---|
| Human Testing | Included with Pentesys | Sometimes included |
| AI Assisted | Included with Pentesys | Sometimes included |
| PTaaS | Included with Pentesys | Not included |
| Continuous Testing | Included with Pentesys | Not included |
| Client Portal | Included with Pentesys | Not included |
| Live Reporting | Included with Pentesys | Not included |
| Credits | Included with Pentesys | Not included |
| Retesting | Included with Pentesys | Not included |
| API Integrations | Included with Pentesys | Not included |
| Flexible Scheduling | Included with Pentesys | Not included |
| Executive Dashboards | Included with Pentesys | Not included |
| Compliance Mapping | Included with Pentesys | Not included |
Trusted by security teams under pressure
“Pentesys has continuously produced excellent work. Their group demonstrated extraordinary technical proficiency by spotting crucial flaws and offering clever fixes that greatly strengthened our security stance. Their meticulous approach and attention to detail ensured that every facet of the project was covered in full.”
Pentesys Limited
A UK cybersecurity company delivering CREST-approved penetration testing, PTaaS, CTEM, EASM and red teaming to organisations across the UK and internationally. Read our latest research and guidance in the knowledge base.
- Registered office
- 124 City Road, London, EC1V 2NX, United Kingdom
- sales@pentesys.com
- Telephone
- +44 (0)330 133 8569
- Company number
- 15041337 (Companies House, England & Wales)
- Accreditation
- CREST-approved penetration testing company
Ready to continuously validate your security?
Talk to Pentesys about penetration testing, PTaaS, CTEM or red-team requirements.