Umbrel[0] maybe? I posted a list of related services here[1] as well, though most of them are cloud based.

[0]: https://umbrel.com/

[1]: https://forum.indiebits.io/t/open-identities/500/12

Hard to take this product/company seriously when every piece of copy on their site feels toxic, condescending, or dismissive.

What's an alternative server for self-hosted AI with comparable price/performance?

Oh, I truly have no idea, but that wasn't my point. Their product could be best (or the only) in class for all I know.