WhatWeb vs Yasuo: 2026 Comparison
WhatWeb is a free security scanning tool. Yasuo 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 available product data, here is our conclusion:
Penetration testers and security researchers doing reconnaissance will find WhatWeb invaluable for passive technology fingerprinting across hundreds of targets simultaneously; its plugin architecture identifies 6,000+ web technologies and CMS variants that commercial scanners miss or charge extra to detect. The tool's free, open-source nature and 6,054 GitHub stars mean you get maintained detection rules without vendor lock-in. Skip this if you need active vulnerability scanning or compliance reporting; WhatWeb stops at "what's running," not "what's broken.
DevSecOps teams operating on minimal budgets will get real value from Yasuo because it does one thing well: finding vulnerable third-party web applications already sitting in your network, which most scanners miss or charge heavily for. The 573 GitHub stars and active Ruby community mean it's battle-tested enough for production use without licensing friction. Skip this if you need scanning for custom code or containerized applications; Yasuo is specifically built to hunt known exploits in off-the-shelf software, not your own vulnerabilities.
