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Obsidian is now free for work - Obsidian
(obsidian.md)
This is a most excellent place for technology news and articles.
It's a different thing. What Obsidian and Logseq offer is plain-text markdown files in folders on your disk. Upnote and most of the other alternatives mentioned in this post store their data in a database.
Different thing altogether. Just depends what you're looking for.