And if there is a migration tool from onenote to the alternative that would be even better.
- I’m running Joplin syncing through a nextcloud. Works solid for 2 years now. 
- I really like Trilium. It’s basically a FOSS Obsidian. It does not have a phone app but the web interface is mobile-friendly. 
- I’ll throw out there that Emacs - org-modeis an incredibly robust solution for this, although it may be a bit overkill for your needs (and may send you down an Emacs rabbit hole).- At least for me, it’s gotten to the point that my entire life can be summarized in a giant pile of - *.orgfiles. I highly recommend it
- I used Joplin and now use Notesnook. At the time I switched because Notesnook had better support for tables, Joplin sucked for taking some stuff out of Onenote that had tables. - I am going to try out Trilium in comparison to Obsidian as a next thing. Currently I have stuff scattered in Onenote, Joplin, and Notesnook so I guess it’s a sign that none fully hit the mark. - This is old now, but I recently found Zettlr and I am liking it so far. It has better navigation than Notesnook and very easy to use. I like the way it renders markdown without having to switch between a read or edit type of view like Joplin. 
 





