Yes, Facebook is mercurial based to my knowledge. Google is using its custom solution called piper I think: https://cacm.acm.org/magazines/2016/7/204032-why-goo

Yes, Facebook is mercurial based to my knowledge. Google is using its custom solution called piper I think: https://cacm.acm.org/magazines/2016/7/204032-why-google-stores-billions-of-lines-of-code-in-a-single-repository/fulltext https://cacm.acm.org/magazines/2016/7/204032-why-google-stor...