Thoughts on Overleaf v2, Git and GitHub
The upgrades available for Overleaf v2. balance against the GitHub permissions required. An alternative to giving Overleaf GitHub permissions is the direct Git Overleaf v2 interface.
Parts of the Overleaf v2 code base are open source, due to ShareLaTeX being open source, which Overleaf v2 is based on.
Edit Overleaf LaTeX documents offline from a Dropbox folder or Git repo on your computer. Overleaf with GitHub is more cumbersome, but offers the benefit of a second live copy in case you’re worried about corrupted documents.