EvoMaster vs FYEO Custom Fuzz Testing: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
EvoMaster is a free dynamic application security testing tool. FYEO Custom Fuzz Testing is a commercial dynamic application security testing tool by FYEO. Compare features, ratings, integrations, and community reviews side by side to find the best dynamic application security testing fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Development teams shipping APIs without security test coverage should use EvoMaster to automatically generate attack payloads that traditional unit tests miss; the tool's evolutionary algorithms find edge cases and input combinations humans won't, reducing the manual effort of fuzzing by orders of magnitude. It's free and open-source with 611 GitHub stars, meaning you're not paying license fees to experiment with dynamic testing in CI/CD pipelines. Skip this if your APIs are already wrapped in a WAF or if you need runtime protection for production traffic; EvoMaster finds bugs before deployment, not after.
Mid-market and enterprise teams securing Layer-1 protocols, smart contracts, or custom DeFi runtimes need FYEO Custom Fuzz Testing because it builds harnesses around your actual threat model instead of running generic fuzzing templates against your code. The stateful execution with shadow-state tracking and invariant checking catches logic flaws that stateless fuzzers miss, and CI integration means you're re-running those same reproducible seeds on every release. Skip this if your codebase is small or you're looking for a self-service tool; FYEO's 12-person team is built for hands-on engagement with mid-market and up, and that model doesn't scale to solo developers or teams that need instant turnaround.
