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Obsidian Sync may provide a partial solution but it's mainly targeted at a single user synchronizing vaults between devices. There's also the Obsidian Git[1] plugin if you're working with developers that are familiar with Git, with all of the pros and cons you'd expect. Finally, there's obsidian-livesync[2] which in theory would provide some very powerful functionality; it seems very cool but given that doing such livesync is complex and easy to get wrong exercising a great deal of caution (frequent backups and care when rolling out for production uses) seems prudent.

Keep in mind that Obsidian requires a license for business use[3]. They're a very small shop that's entirely funded by licensing/sync/publishing income and are making a pretty fantastic product and they deserve some cash to keep developing Obsidian.

[1]: https://github.com/denolehov/obsidian-git [2]: https://github.com/vrtmrz/obsidian-livesync [3]: https://obsidian.md/pricing