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Fencer and XBOW both run fully autonomous AI pen tests that prove exploits with reproducible evidence. XBOW is a web and API exploitation engine that hands the proven finding to your team to fix. Fencer proves exploits across the whole stack and then applies the fix, opening pull requests for code and correcting cloud misconfigurations through the provider API, at published pricing. XBOW’s strength is provable web and API exploit quality; Fencer’s is proving and then closing the finding, across more of your stack, at a price you can see.
Lean software teams that want proven exploits closed with applied fixes across the whole stack, at published pricing.
Teams that want dedicated autonomous web and API exploitation (and the budget to match), and who have dedicated in-house resources to remediate findings.
The core of AI penetration testing is proving a vulnerability by exploiting it. Both tools prove exploits with reproducible evidence, so treat this as a shared strength.
Proving an exploit is step one; closing it is the outcome. This is the clearest difference between the two.
Coverage decides how much of your stack one tool secures. XBOW concentrates on web and API; Fencer spans the software stack.
What a tool hands back decides how much work a lean team without a security function still has to do.
Whether pricing is published tells a lean team if it can evaluate without a sales cycle. XBOW has moved to usage-based quoting.
| Criterion | Fencer | XBOW |
|---|---|---|
| Proves exploits | Yes | Yes |
| Fixes the vulnerabilities | Applies fixes: pull requests for code, cloud corrected directly | Remediation guidance and a re-test; your team fixes |
| Attack surface | Whole software stack | Web and API only |
| Cadence and timing | On demand, full report in hours | On demand, full report in about five business days |
| Pricing | $3,000 or included on platform plans | Usage-based quote |
| Built for | Lean software teams | Security teams that manage remediation in-house |
Fencer is the better fit for a lean software team that wants proven exploits closed across the whole stack, with fixes delivered as pull requests, at a visible price, and without a security team to route findings.
XBOW is the better fit for a team that wants dedicated autonomous web and API exploitation, is comfortable applying the fixes itself, and runs separate tools for the rest of its stack.
