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   * [ssllabs.com](https://www.ssllabs.com/ssltest/) — Very deep analysis of the configuration of any SSL web server
   * [StackHawk](https://www.stackhawk.com/) Automate application scanning throughout your pipeline to find and fix security bugs before they hit production. Unlimited scans and environments for a single app.
   * [Sucuri SiteCheck](https://sitecheck.sucuri.net) - Free website security check and malware scanner
+  * [SuperTokens](https://supertokens.com/) - Open source user authentication that natively integrates into your app - enabling you to get started quickly while controlling the user and developer experience. Free for up to 5000 MAUs.
   * [Protectumus](https://protectumus.com) - Free website security check, site antivirus and server firewall (WAF) for PHP. Email notifications for registered users in free tier.
   * [TestTLS.com](https://testtls.com) - Test a SSL/TLS service for secure server configuration, certificates, chains etc. Not limited to HTTPS.
   * [threatconnect.com](https://threatconnect.com) — Threat intelligence: It is designed for individual researchers, analysts and organizations who are starting to learn about cyber threat intelligence. Free up to 3 Users