Comparisons
How Cactus compares
Honest comparisons with tools you may already know - what each does best, and where Cactus's free, bilingual, plain-language approach fits.
A free securityheaders.com alternative
securityheaders.com is the classic header grader. Cactus does the same A-to-F grading, free and bilingual, with plain-language fixes.
Read comparisonA free MXToolbox alternative for everyday checks
MXToolbox is the pro's Swiss-army knife for DNS and email diagnostics. Cactus covers the everyday checks - email auth, TLS, blacklists, certs - explained simply and free.
Read comparisonA free VirusTotal alternative for checking links
VirusTotal is a deep, analyst-grade scanner. For the everyday question - "is this link safe?" - Cactus gives a clear, plain-language answer, free and bilingual.
Read comparisonA free SSL Labs alternative for quick TLS checks
SSL Labs is the definitive TLS audit - and it takes minutes. For the everyday check, Cactus grades a site's HTTPS in seconds, A+ to F, in plain language, free and bilingual.
Read comparisonA free Have I Been Pwned alternative
Have I Been Pwned is the world's breach database - Cactus's password check even runs on its data. What Cactus adds is a plain-language front door: clear results and next steps, in English or French, free, no signup.
Read comparison