Acunetix API Security Testing is a commercial api security tool by Acunetix. @fastify/helmet 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, company size fit, deployment model, here is our conclusion:
Development teams and AppSec programs managing REST, SOAP, and GraphQL APIs across multiple environments should pick Acunetix API Security Testing for its ability to discover hidden and undocumented endpoints that standard scanners miss, then validate them at scale through continuous automated scanning integrated into CI/CD pipelines. The tool's IAST sensor delivers server-side context during testing, which matters when you need to confirm whether a detected vulnerability actually executes or stays theoretical. This is less valuable for organizations still building API inventory or those needing manual penetration testing depth; Acunetix assumes you know what you're protecting and want to run it fast and often.
Fastify teams building APIs that need HTTP header security without operational overhead should start with @fastify/helmet; it's a thin wrapper around the battle-tested helmet library, meaning you get OWASP Top 10 mitigations (CSP, HSTS, X-Frame-Options) with minimal configuration beyond `fastify.register()`. The 453 GitHub stars and zero-friction npm install make adoption frictionless for small-to-mid teams. Skip this if you need dynamic policy management, request-level header mutation, or centralized policy enforcement across multiple services; @fastify/helmet is intentionally static and Fastify-bound, not a gateway or orchestration tool.
API vulnerability scanning and testing for REST, SOAP, and GraphQL APIs
A Fastify plugin that implements HTTP security headers through a wrapper around the helmet library to protect web applications from common vulnerabilities.
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Common questions about comparing Acunetix API Security Testing vs @fastify/helmet for your api security needs.
Acunetix API Security Testing: API vulnerability scanning and testing for REST, SOAP, and GraphQL APIs. built by Acunetix. headquartered in United States. Core capabilities include Hidden and undocumented API discovery, REST API vulnerability scanning, SOAP API vulnerability scanning..
@fastify/helmet: A Fastify plugin that implements HTTP security headers through a wrapper around the helmet library to protect web applications from common vulnerabilities..
Both serve the API Security market but differ in approach, feature depth, and target audience.
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