Yes. There are now AI-driven/autonomous penetration-testing platforms that go substantially beyond traditional vulnerability scanners: they can crawl an application, authenticate, discover attack surfaces, generate attack attempts, chain weaknesses, and validate whether a vulnerability is actually exploitable.
Strong options to evaluate
- xbow.com — Probably the closest match to what you're describing. XBOW uses AI agents to systematically test web applications and APIs, attempting exploitation rather than merely matching signatures. Its documentation says it validates exploitable vulnerabilities and provides evidence-based findings.
- horizon3.ai — Autonomous web-app pentesting that crawls, authenticates, attacks, and produces replayable proof. It specifically targets things such as broken access control/IDOR/BOLA, business-logic flaws, XSS, SQLi, SSRF, and chained attack paths.
- docs.horizon3.ai — Particularly interesting if you want authenticated testing against staging, production, or private applications. It can use multiple user roles to test authorization boundaries and employs a headless browser to exercise modern JavaScript applications.
The important distinction
If by "common and unknown vulnerabilities" you mean zero-days or genuinely novel vulnerabilities, I'd temper expectations.
These systems can discover previously unknown-to-you vulnerabilities and novel combinations of known weaknesses, because the AI isn't restricted to a CVE/signature database. For example, an agent may discover that:
normal user → manipulate object ID → access another user's record → obtain privileged token → reach administrative function
That's considerably more interesting than a conventional scanner reporting "CVE-XXXX-XXXX."
But no commercial AI pentest platform can credibly guarantee discovery of arbitrary zero-days. Novel vulnerability research still benefits enormously from experienced human researchers.
What I'd do for your pentest
For a serious web application assessment, I'd consider an autonomous platform as a continuous/automated layer, rather than a complete replacement for a skilled manual pentest:
- AI/autonomous test: crawl the entire application, APIs and authenticated workflows.
- Multiple roles: provide representative low-privilege and administrative accounts so authorization/business-logic issues can be exercised.
- Run against staging first: establish what the agent actually does and tune testing rules.
- Production-safe pass: where supported, use read-only/GET-only or otherwise constrained testing before enabling deeper exploitation. NodeZero, for example, explicitly supports graduated production testing.
- Human follow-up: have a pentester investigate the AI's findings and hunt for business-logic issues, race conditions, unusual trust boundaries, and genuinely novel attack paths.
If I were shortlisting just two to evaluate first, I'd put XBOW and NodeZero WebApp at the top. XBOW is especially interesting if your priority is autonomous web/API vulnerability discovery; NodeZero is compelling if you want web testing integrated with broader identity, cloud, and infrastructure attack-path validation.
If you tell me your stack (e.g. React + Node, .NET, Java/Spring, APIs/GraphQL, AWS/Azure) and whether the app is internet-facing or internal, I can compare the available platforms on coverage, authentication, CI/CD integration, safety, pricing model, and how well they handle business-logic/IDOR vulnerabilities.
What I'd do for your pentest
For a serious web application assessment, I'd consider an autonomous platform as a continuous/automated layer, rather than a complete replacement for a skilled manual pentest: