Perisai Web Scanner vs is-website-vulnerable: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
Perisai Web Scanner is a free security scanning tool by Peris.ai. is-website-vulnerable is a free security scanning tool. Compare features, ratings, integrations, and community reviews side by side to find the best security scanning 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:
Startup development teams shipping fast need Perisai Web Scanner because it catches vulnerable dependencies and misconfigured headers in minutes without requiring infrastructure changes. The free tier covers automated scanning across JavaScript libraries and HTTP security posture, removing the cost barrier that usually delays security scanning adoption. Skip this if you're managing legacy monoliths with hundreds of interconnected services or need continuous runtime monitoring post-deployment; Perisai maps application risk at scan time, not in production.
DevSecOps teams managing frontend supply chain risk should use is-website-vulnerable because it catches known JavaScript library vulnerabilities that most web application scanners deprioritize, and it's free, which removes the friction of piloting before committing budget. The 2,021 GitHub stars reflect actual adoption by teams building CI/CD scanning into their pipelines rather than relying on manual assessments. Skip this if you need coverage beyond frontend dependencies or want detection across your entire application stack; is-website-vulnerable is deliberately narrow, scanning only what Snyk's database knows about, not unknown or server-side vulnerabilities.
