Keycloak vs Authentik

docs/organisation/entscheidungen/Applicatons/sso.md

@@ -12,6 +12,10 @@ Technical Story: [description | ticket/issue URL] <!-- optional -->
 
 [Describe the context and problem statement, e.g., in free form using two to three sentences. You may want to articulate the problem in form of a question.]
 
+- Keycloak vs Authentik: https://www.reddit.com/r/selfhosted/comments/ub7dvb/authentik_or_keycloak/
+    - https://github.com/authelia/authelia
+    - https://github.com/zitadel/zitadel
+
 ## Decision Drivers <!-- optional -->
 
 * [driver 1, e.g., a force, facing concern, …]