Acunetix Web Application & API Security vs Rexsser: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
Acunetix Web Application & API Security is a commercial dynamic application security testing tool by Acunetix. Rexsser is a free dynamic application security testing tool. 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:
Acunetix Web Application & API Security
Mid-market and enterprise teams scanning high-volume web applications and APIs will get the fastest time-to-remediation from Acunetix Web Application & API Security because its proof-of-exploit feature eliminates the false positive triage work that burns through security resources. The blended DAST/IAST approach detects over 12,000 vulnerability types including zero-days, and scheduled continuous scanning catches drift in multi-environment deployments. Skip this if your main gap is secure code review or SAST; Acunetix prioritizes detection over identifying vulnerable code lines early in the pipeline, so developers won't get line-level guidance before deployment.
AppSec teams running Burp Suite who want to accelerate reflected XSS discovery without manual regex writing should evaluate Rexsser. The plugin extracts keywords from HTTP responses and tests them automatically, cutting the time spent on pattern matching during active scanning; at 75 GitHub stars and free pricing, it's low friction to pilot alongside existing Burp workflows. This is not a replacement for a full DAST platform,it's a focused XSS hunter that works within your existing tool, so teams expecting broader vulnerability coverage or supply chain scanning should look elsewhere.
