Transparency

We run Cactus on ourselves

A security tool should hold itself to the same standard it checks others against. Here are Cactus's own live results.

These results come from running Cactus's own checkers against cactus.net, refreshed hourly.

Encryption

SSL/TLS configuration

This check could not be completed right now. It refreshes automatically.

Email authentication

SPF, DKIM & DMARC

SPF: Present
DMARC: Present

Run the full email authentication check

Last checked 2026-06-13 06:38 UTC.

Reporting a security issue

Found a security issue? Email info@cactus.net or see our security.txt. We welcome responsible disclosure and will respond promptly.

Free, with no catch

Cactus is free, and we will never ask you for payment or credit-card details - there's nothing to buy and no account to create. If a page on cactus.net ever asks for your card number, it isn't us. The optional "Buy me a coffee" link just lets supporters chip in toward hosting and subscription costs; you never need it to use any tool.