There are a few lesser known projects, I used.<p>Trillium - <a href="https://triliumnotes.org/" rel="nofollow">https://triliumnotes.org/</a><p>Joplin - <a href="https://joplinapp.org" rel="nofollow">https://joplinapp.org</a><p>I personally use Flatnotes - <a href="https://github.com/Dullage/flatnotes" rel="nofollow">https://github.com/Dullage/flatnotes</a> with a connected git repository, but this does not meet your requirements.

<a href="https://hyperclast.com/" rel="nofollow">https://hyperclast.com/</a><p>I built it because Notion is way too slow. I loved Obsidian, but I wanted it to be multi-player so my whole team could use it. It is fast, open, and self-hostable.<p>It meets all the criteria you listed except the mobile app. Mobile app will be out next week. I'd happy to build any other features you need. Just let me know at k@hyperclast.com :-)

I was on Obsidian for a while, moved away to try Supernotes and other competitors, and now I'm in the process of moving back to Obsidian.<p>Has everything you want I think with plugins to do a ton more while still essentially being just Markdown.

I don't have the same requirements and when I really thought about it, it turns out I need very few things and can get by without the other requirements.<p>So for many years it's been orgmode in emacs. Not exactly a wiki, but you can treat it as such. As they are "just text files", you can treat them as that and many things become simpler. Difficult to share with non-emacs users is probably the only downside.

The Fossil SCM (<<a href="https://fossil-scm.org" rel="nofollow">https://fossil-scm.org</a>>) meets most of your requirements, noting that:<p>- "mobile app" means "its web interface"<p>- "backed up" means to wherever you upload/sync your backups to<p>- No automagic table calculation support.

My go‑to for a personal wiki in 2026 is Obsidian.<p>Also Logseq worth it.

Bookstack.<p>It stores pages in a database, but you could export them in markdown. Web interface is mobile friendly, essentially an app.

For a personal wiki I would use wikijs