You might be interested in our real-time collaboration plugin for Obsidian called Relay [0].

Relay attaches a CRDT to the Obsidian editor. It makes collaboration really smooth and removes conflicts.

Markdown collaboration is free, but we do charge for attachment/media storage. If you dm me (@dtkav) on our discord [1] or email me (in my profile) I'm happy to give out free storage to HN folks.

One other benefit of using Relay is that you can use the new "App Storage" feature on Android to keep your files isolated and private on your device [2]. Using dropbox/gdrive forces you to store your notes in your documents folder and that means that they can be read by other apps.

[0] https://relay.md

[1] https://discord.system3.md

[2] https://obsidian.md/changelog/2025-04-22-mobile-v1.8.10/