The options were always the same: email .3dm files back and forth and merge changes by hand, or set up the collaboration features in BIM software like Revit, which take so many steps and so much configuration that nobody on a small team bothers. The few Rhino sync plugins I tried were fragile and needed constant manual syncing. So I built the thing I wanted.

RhinoCollab is a Rhino plugin plus a server. Several people edit the same model live, move an object and everyone sees it move. The scene lives on the server permanently, so people come and go, work alone or together, and the project owner doesn't need to be online. You install the plugin, invite your team, and you're working together. No file merging, nothing to configure past the install.

It's finished and tested across plenty of sessions. It's a paid subscription where the host pays and invited collaborators join for free. I'd love feedback, especially from anyone who's fought with collaboration in CAD before. Happy to answer anything.