Jellyfin. Just be weary that it’s not great in some cases depending on your hardware. A media server is typically a weak workstation PC. I found that Jellyfin does not handle ASS (most common format for Anime) subtitles well, though if you only have SRT subtitles you should be fine.

There are a few other little things that are missing, such as sorting shows by date last episode was added and the clicking on a show button will always start the very first episode available instead of the next un-played episode.

I actually host nightscout, that’s the one that is mainly useful for me personally. Technically nightscout advocates against self-hosting but it actually seemed simpler for me to self host than figuring out and keeping track of which providers will give me enough for free to run it since it keeps changing.