DNS Rebind Toolkit vs Whonow: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
DNS Rebind Toolkit is a free penetration testing tool. Whonow is a free penetration testing tool. Compare features, ratings, integrations, and community reviews side by side to find the best penetration testing fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
Penetration testers and red teamers validating internal network segmentation controls should use DNS Rebind Toolkit for its lightweight JavaScript-based attack simulation; it requires no server infrastructure or complex setup, which makes it fast to deploy in lab environments. The toolkit has 507 GitHub stars and directly tests a common but often-overlooked vulnerability class that standard network scanning misses. Skip this if your goal is to simulate attacks against modern browsers with strict CORS and SameSite policies already enforced, since those defenses significantly reduce the practical impact of rebinding attacks in real-world assessments.
Penetration testers and red teamers running internal security assessments need Whonow because DNS Rebinding attacks are nearly impossible to execute manually and this tool removes that friction entirely. The free pricing and 654 GitHub stars signal active adoption among practitioners who've validated the technique works against real same-origin policy implementations in air-gapped testing. Skip this if your team lacks the network access or authorization to run active DNS manipulation; Whonow is a surgical instrument for controlled lab and authorized internal assessments, not a passive reconnaissance tool.
