After merging with Sharelatex, Overleaf evolved, they will charge for the feature of integration with Github and direct git access in the future. Finally, the git integration in Overleaf v1 was a free feature during its long beta period, and
GitHub vs. Bitbucket vs. GitLab vs. Coding – flow.ci – Medium
Free plan của Gitlab cho unlimited private repos & collaborators. GitHub supports: – The import of Git, SVN, HG, TFS. GitLab supports: -The import of Git. -Easy import from other services GitHub, Bitbucket, Google Code, Fogbugz. Coding supports: – The