Pentest · Training · Consulting

Find your vulnerabilities before attackers do

Fenrir is a cybersecurity firm run by certified ethical hackers (CEH, Pentest+, EC-Council Instructor). We pentest web, mobile, network and IoT systems for teams in healthcare, finance and the public sector, and deliver a clear report with prioritised, actionable remediation.

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Certified expertise
  • Certified Ethical Hacker (CEH)
  • CompTIA Pentest+
  • Certified EC-Council Instructor
Recognised & accredited
Cybermalveillance.gouv.fr referenced provider France Num accredited activator
Original research

We disclose vulnerabilities and publish security advisories from our own lab.

Read our advisories
What we do

Security that fits where you are

Every organisation is at a different point. Pick the level of support that matches your situation, from a first look at what you expose to continuous testing and team training.

Recon

When you want a clear map of everything you expose online.

We discover the domains, hosts, services and forgotten assets an attacker sees first, so you know your real attack surface before they do.

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Pentest

When you need a focused, hands-on test of a critical system.

Certified ethical hackers manually test your web, mobile, network or IoT systems and deliver a clear report with prioritised, actionable fixes.

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AI vulnerability scanning

When you want continuous coverage between pentests.

AI-assisted scanning watches your assets around the clock, surfacing new issues fast and cutting false positives so nothing slips through the gaps.

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Training

When you want to level up your team’s security skills.

Hands-on workshops and certification tracks (C|EHv13, CompTIA PenTest+, King of the Hill) on 100% in-house labs, taught by practitioners.

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How we work

Clear from first call to final fix

1

Scope

We agree the scope, goals and rules of engagement together, with no surprises and no scope creep.

2

Test

Certified hackers test hands-on and keep you updated as findings come in.

3

Fix

You get a clear, prioritised report, plus our help applying the remediation.

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Fenrir
Who we are

A certified expertise

All of our services (PenTest, Training, Consulting, Incident Response, DDoS attack remediation […]) are managed by one or more certified experts (Certified Ethical Hacker, Pentest+, Certified EC-Council Intructor, […]). We always aim to elevate our crafts, bringing innovation to penetration testing and IT traning. Our team has been working for several years for small companies to large organizations in the government, banking and medical domains.

  • Certified ethical hackers: CEH, Pentest+, EC-Council Instructor
  • Reports with clear, prioritised and actionable remediation
  • Proven across government, banking and medical organisations
  • Referenced by Cybermalveillance.gouv.fr and France Num
More about us
Testimonials

Trusted by the teams we work with

You get the feeling that Fenrir is up to date with cybersecurity, they know what the current threats are and how to prevent them. If you’re looking for people who combine education, goodwill and real professional expertise when it comes to cyber threats, you’ve come to the right place.
Maxime Guémon
Maxime Guémon

Independent

2nd mission with Fenrir after a first one 3 years ago for a web audit (Firebase & Angular Suite) Already excellent at the time, Jérémie is now very experienced: Meticulous and structured work. Clear and complete test report. Pedagogical in his explanations. Perfect!
Mahé Cornillon
Mahé Cornillon

Director @OTB SAS

An extremely competent and conscientious professional, who left no stone unturned and produced a more than comprehensive report.I would recommend him without hesitation.
Jean-Phillipe Helal
Jean-Phillipe Helal

Director @Nature Verte

Not sure where to start? Let’s talk.

Tell us what you want to protect and we’ll recommend the right approach: recon, a pentest, continuous scanning or training.

Book a call
[email protected] +33 9 72 15 03 68