I think you might've read too quickly.. this is almost exactly what I wrote: In my case, the ‘GitHub for writers’ concept is really just a specific solution to

I think you might've read too quickly.. this is almost exactly what I wrote: In my case, the ‘GitHub for writers’ concept is really just a specific solution to umbrella categories of ‘collaboration for writers’ and ‘version control for writers’, so I found competitors under those terms. Draft, Editorially, and Authorea are some of them (now part of a huge list of competitors in my folder, too).