Linux equivalent for Microsoft Visio?

There's Dia.. Not nearly as many features as Visio, but does diagrams: http://live.gnome.org/Dia

How about Pencil?

http://pencil.evolus.vn/en-US/Home.aspx

diagrams.net works on Linux, is free and supports either local saving, or you can save Google Drive, OneDrive and Dropbox.

There is also a desktop version with snap, AppImage, rpm and deb releases.