diff --git a/README.md b/README.md
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@@ -499,6 +499,7 @@ Table of Contents
   * [Mozilla Observatory](https://observatory.mozilla.org/) — Find and fix security vulnerabilities in your site.
   * [Okta](https://developer.okta.com/) — User management, authentication and authorization. Free for up to 1000 monthly active users.
   * [onelogin.com](https://www.onelogin.com/) — Identity as a Service (IDaaS), Single Sign-On Identity Provider, Cloud SSO IdP, 3 company apps and 5 personal apps, unlimited users
+  * [Operous](https://operous.dev/) — Cloud instance testing tool with a comprehensive and automated set of test-suites of best practices, performance, and security. Free tier offers 100 testing minutes, 10 Test Suites, and up to 5 instances to 1 user.
   * [opswat.com](https://www.opswat.com/) — Security Monitoring of computers, devices, applications, configurations,... Free 25 users and 30 days history users.
   * [pyup.io](https://pyup.io) — Monitor Python dependencies for security vulnerabilities and update them automatically. Free for one private project, unlimited projects for open source.
   * [qualys.com](https://www.qualys.com/community-edition) — Find web app vulnerabilities, audit for OWASP Risks