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Rexsser is a free dynamic application security testing tool. Intruder Web Application Scanning is a commercial dynamic application security testing tool by Intruder. Compare features, ratings, integrations, and community reviews side by side to find the best dynamic application security testing fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
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.
Intruder Web Application Scanning
Startups and mid-market teams with limited AppSec headcount should use Intruder Web Application Scanning because the 24/7 automatic scanning and business-impact prioritization eliminate the manual triage work that makes DAST programs fail in small orgs. Seventy-five vulnerability types plus 140,000 infrastructure checks mean you're catching real issues without needing a dedicated researcher to interpret results. Skip this if your primary concern is API security at scale; the tool handles APIs competently through schema upload, but native API-first vendors will give you better coverage on GraphQL and async patterns.
A Burp Suite plugin that extracts keywords from HTTP responses using regex patterns and tests for reflected XSS vulnerabilities within the target scope.
DAST tool for scanning web apps and APIs for OWASP Top 10 vulnerabilities
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Common questions about comparing Rexsser vs Intruder Web Application Scanning for your dynamic application security testing needs.
Rexsser: A Burp Suite plugin that extracts keywords from HTTP responses using regex patterns and tests for reflected XSS vulnerabilities within the target scope..
Intruder Web Application Scanning: DAST tool for scanning web apps and APIs for OWASP Top 10 vulnerabilities. built by Intruder. headquartered in United Kingdom. Core capabilities include Automated scanning for OWASP Top 10 vulnerabilities, Checks for 75+ application vulnerabilities, 140,000+ infrastructure security checks..
Both serve the Dynamic Application Security Testing market but differ in approach, feature depth, and target audience.
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