VoidAuth is simpler to setup/use than Authentik for sure, but of course Authentik has more features. They both support proxy-auth, OIDC, and have user management UIs so in that way they are similar. I like VoidAuth for its simplicity but you can always run both and decide, if you have any questions about setup I will try to answer!

I would not recommend using VoidAuth to anyone who needs to be any kind of security compliant. I am not a security professional and am using packages for the OIDC and other security heavy-lifting. I can recommend VoidAuth for those just looking for a simple but good looking auth app for securing their own selfhosted apps and resources.

Let me know how it goes!