There are so many out there, a few that I came across include:
- Wallabag ( GitHub, Website): Older, long history, somewhat clunky now?
- LinkWarden (Website): Focus on multi user and teams?
- Raindrop.io (Website)
- Omnivore (Website)
- Hoarder (GitHub)
- Shiori (Article)
- Readeck (Website)
Having a giant comparison table for this might be nice
I migrated all my Firefox bookmarks to a self-hosted Linkding instance. https://github.com/sissbruecker/linkding/ Lightweight and once you get a tagging methodology in place its super useful.