Continuous adversarial validation
Attack-Proven Defence.
Two sibling platforms that autonomously discover and fix vulnerabilities in a closed loop. Keelr attacks, Panthero defends, the loop never stops - autonomous adversarial validation, EU-sovereign by design.
How the loop runs
Five stages, repeating.
Authorise
Customer declares the scope. Cryptographic consent is signed, bound to named assets, time-boxed, revocable, audit-logged. Nothing runs outside scope.
Attack
Keelr runs authorised adversarial simulation against the scope. The Offensive Agent picks the engagement, the technique, the timing. Every action is scope-bound.
Discover
Findings land with severity on a shared 0-100 scale. Exploitability is validated non-destructively, not just static-matched. Theoretical and proven are labelled.
Defend
Panthero ingests the finding, stages compensating defence straight away, then writes the real remediation. Staging gets the fix autonomously; production stays human-gated.
Re-attack
Keelr re-runs the exact exploit path from the originating Code Artifact against the fix. If it no longer works, the fix is confirmed. The loop closes on proof, not on claim.
What autonomy actually means
Autonomous to staging. Human-approved for production.
Autonomy means the loop runs on its own cadence, without waiting for a human to queue the next attack, triage the next finding, or hand-write the next fix. The Offensive Agent on Keelr and the Defensive Agent on Panthero discover, validate, and propose remediations without supervision.
What autonomy does not mean: pushing fixes to your production without your approval. Staging gets fixes applied and re-attacked automatically. Production gets fixes staged and surfaced as ready to promote. Your production gate stays human-controlled.
This is the posture that resolves the liability question other vendors never address. The autonomy lives in discovery, validation, and proposed remediation. The last mile stays yours.
The closed-loop proof
The fix is confirmed when the attack stops working.
Every finding Keelr records comes with the Code Artifact that proved it - the exact technique, the exact target, the exact evidence. When Panthero deploys a fix, the same artifact is re-run against the patched target.
Three outcomes: fix_confirmed (Keelr could no longer exploit, Panthero proposes prod promotion), fix_failed (Keelr still exploited, Panthero iterates), inconclusive (target unreachable, re-attack retries on backoff).
After confirmation the artifact transitions from live exploit probe to closed-loop regression test. It keeps running against that asset, quietly, so a regression is caught the moment it ships - not the moment a breach is discovered.
The structural wedge
Why only we can sell this, honestly.
Defensive incumbents cannot run offence.
Adding offensive simulation to a defensive product means acquiring an offensive vendor and integrating two cultures, two contracts, two pricing models. Even when done, the result is two tools bolted together - not a loop.
Offensive incumbents cannot own remediation.
The best autonomous-pentesting platforms stop at the finding. To close the loop they would need to become a managed service, lose product economics, and take on the deployment risk of customer infrastructure - a line they all deliberately decline to cross.
Only a purpose-built loop can sell attack-proven defence.
Keelr and Panthero are siblings by design. Same company, same stack, same security posture, same pricing motion. One loop, two roles, zero integration tax. That is structurally impossible for anyone selling category products.
EU sovereign by design
Your data, your regulators, your rules.
The loop runs entirely on EU infrastructure across multiple European regions. Every layer - defensive, offensive, Agent reasoning - is EU-hosted by architecture. That posture is not a preference, it is a hard architectural constraint.
For post-NIS2 and DORA procurement, EU sovereignty is no longer a tick-box. It is the difference between a vendor that clears your compliance team and a vendor that does not. Being Romanian-based means every customer contract sits inside EU law from day one.
The only EU-sovereign, autonomous, closed-loop offence-to-defence platform. That phrase is defensible because nobody else is structured to say it honestly.
Run the loop on your scope.
Founding customers registering by 14 July 2026 get 25% off annual or 15% off monthly - and keep the founding rate as long as they stay on the same tier.
See the defensive half at panthe.ro