[btipling]

You might also want to check out Floobits which has collaborative editing for vim and neovim:

https://github.com/Floobits/floobits-vim

https://github.com/Floobits/floobits-neovim

https://floobits.com/help/plugins/nvim

[colordrops]

Looks cool. Just a note, this is not free.

[btipling]

It's the same model as GitHub. It costs money for private repos. So it is free if that's what you want.