It's not exactly like logseq but I really like SilverBullet (https://silverbullet.md/). It's self-hostable and really hackable (plugins, dynamic categorization via embedding custom queries, etc.). Browsers are the first class platform. I really dislike how logseq/Obsidian etc. try to push you towards local fat clients or web clients that only use browser local storage. I _want_ everything stored on a central server so I can just pick up on any device without having to sync.