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
+1 for Raindrop, that app is amazing, I keep watching for a self-hosted version/alternative that is as good and they are getting closer. The killer feature for me is being able to highlight stuff and then when you visit the site again you see what you have highlighted (in addition to saving them elsewhere). I also pay for premium because it’s great, I don’t use a ton of the pro features either.