Stack Auth was born out of years of frustration with the incumbents. We wanted to build something that is developer-friendly and open-source at the same time, yet fully managed.
User data is quite critical, and you generally don't want to get locked into a specific vendor. On the other hand, building and maintaining auth infrastructure on-top of existing libraries is tedious work as you grow. Hence:
- Stack is 100% open-source, licensed under MIT and AGPL.
- You can self-host, or choose to use our managed hosting.
- If you choose the latter, there's absolutely no reliance on us; if you think we're doing a bad job at any point in time, you can export all your data and start self-hosting instead.
Also, we're more than just authentication — we have authorization built-in, and a frontend to manage your users. You can use any language to access these features through our REST API [1].
We also have a bunch of components for sign in, password reset, organizations. For now, we only support Next.js frontends and backends in any language with our API, though our docs also list the client endpoints, and some contributors have been building frontends for other languages.
For more info, check out our GitHub repo [2]. Any feedback is highly appreciated!
Thanks all!