Arcanis Labs is an offensive security firm. We think like the attacker so you don't have to find out the hard way. Manual and AI-assisted penetration testing and managed bug bounty that surface the vulnerabilities scanners miss.
Our team has responsibly disclosed critical and high-severity vulnerabilities to some of the most security-conscious organisations on the planet, through their bug bounty and vulnerability disclosure programs.
Trusted across 500+ programs, including Fortune 500 companies, unicorns and public institutions.
Every engagement is led by an experienced operator and mapped to industry frameworks, so findings are real, reproducible, and ready to fix.
Time-boxed, goal-driven engagements that emulate a determined attacker against your defined scope. Deep manual and AI-assisted testing, safe exploitation, and clear proof of impact.
Continuous, incentive-driven testing, run privately or publicly. We design the program, triage every submission, cut the noise, and validate real impact before it reaches you.
What we test
From the browser to the binary, from the API gateway to the internal domain. Wherever your risk lives, we test it.
OWASP-driven testing of modern apps & SPAs: auth, access control, injection, SSRF, and business logic.
Static & dynamic analysis, insecure storage, cert pinning bypass, IPC and runtime manipulation on real devices.
REST, GraphQL & gRPC: BOLA/IDOR, broken function-level auth, mass assignment and rate-limit abuse.
Perimeter and internal assessments, AD attack paths, lateral movement, and privilege escalation.
Desktop & fat-client testing: traffic interception, local storage, DLL/binary analysis, and privilege abuse.
Manual, context-aware secure code review to catch design-level flaws automated SAST tools walk straight past.
AWS, Azure & GCP configuration review, IAM privilege paths, exposed services and container security.
Objective-based, multi-vector campaigns testing your people, process and detection & response.
IoT, hardware, LLM/AI apps, phishing simulations and more. If it has an attack surface, we can assess it.
Talk to usRepeatable, transparent, and mapped to recognised standards, so every finding can be trusted, reproduced and remediated.
We align on targets, objectives, constraints and timelines, then lock in clear rules of engagement before anything is touched.
We enumerate the attack surface the way a real adversary would, mapping assets, entry points and trust boundaries.
Manual, hypothesis-driven testing. We prove impact safely and chain low-severity issues into critical outcomes.
Clear, prioritised findings with reproducible steps, real-world impact and pragmatic fixes, plus a live walkthrough.
Once you've fixed the issues, we retest to confirm they're truly closed, then issue an updated attestation. Included.
Cyber threats don't give warnings.
Awareness does.
Stay alert. Stay informed. Stay secure. The organisations that sleep well are the ones that assumed they were already a target, and tested like it.
Put your defenses to the testAnyone can run a scanner. We deliver the judgement, context and proof that turn a list of alerts into a prioritised plan to reduce real risk.
Start a conversationReal operators augmented by AI tooling, not a dashboard. We find the logic flaws and chains automation alone can't reason about.
Every finding is validated, prioritised by real impact, and written to be understood, with no false-positive padding.
Engagements mapped to OWASP, PTES, NIST SP 800-115 and MITRE ATT&CK for coverage you can evidence to auditors.
We don't disappear at delivery. Fix the issues and we'll verify the fix, attestation updated, no extra invoice.
A board-ready executive summary paired with deep technical detail: reproduction steps, evidence, CVSS-scored severity and remediation guidance.
Every critical and high finding comes with a working, safe proof-of-concept, so there's no debate about whether it's real.
A working session with your engineers to walk the findings, answer questions and agree a realistic remediation path.
Post-fix verification and a signed attestation you can share with customers, partners and auditors.
Arcanis Labs is a forward-thinking cybersecurity firm built on a simple belief: the best way to defend a system is to understand exactly how it breaks. We combine deep offensive expertise with a precise, professional approach to help organisations navigate an increasingly complex threat landscape.
We work as an extension of your team: secure, intelligent and precise, turning adversarial insight into resilience, and a list of alerts into a clear plan to reduce real risk.
Tell us about your environment and what you'd like tested. We'll come back with scope, timeline and a fixed quote, usually within one business day.
