[xyst]

I have been using open source tooling for authentication and authorization. So far I have had good experience with Ory ecosystem and self managing (they have a managed version as well).

It’s missing “billing” compared to Kinde but that’s something I can add with another open source tool — Lagos.

Good luck. I can see the value in startups using this in the short term to quickly get something to market without burning their capital but in the long run it would be better to manage it yourself with good open source tooling.