42Crunch API Scan vs @fastify/rate-limit: 2026 Comparison
42Crunch API Scan is a commercial api security tool by 42Crunch. @fastify/rate-limit is a free api security tool. Compare features, ratings, integrations, and community reviews side by side to find the best api security fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Teams shipping APIs built on OpenAPI specs need 42Crunch API Scan to catch contract violations and injection flaws before production; its real traffic simulation finds what static analysis misses. The tool covers OWASP API Security Top 10 issues and integrates directly into VS Code and GitHub Actions, meaning security checks happen at commit time, not weeks later in a separate scan cycle. Skip this if your APIs aren't documented in OpenAPI format or if you need broader web application scanning beyond API endpoints; 42Crunch is deliberately API-focused, which is exactly why it works.
Teams building Node.js APIs who need rate limiting without the operational overhead of a separate service should reach for @fastify/rate-limit. The plugin ships as a native Fastify middleware with sub-millisecond latency overhead, making it practical for high-throughput routes where traditional gateway-level rate limiting adds unacceptable latency. Not for buyers who need distributed rate limiting across multiple instances without in-memory state coordination or those who require sophisticated quota management beyond simple request-per-window rules.
