When comparing Gitg vs GitUp, the Slant community recommends GitUp for most people. In the question“What are the best visual git GUIs?” GitUp is ranked 7th while Gitg is ranked 12th. The most important reason people chose GitUp is:
Fast Git GUI. Everything is already there and loaded when you open up the window.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Client side decoration (CSD)
Pro Beautiful and simple
The UI is very straightforward, once you open it, you can browse your computer to find an existing git repository and open it in the app. Once opened you can browse commits and view remotes immediately. It also allows you to browse the files and preview them.
There's also a commit view which shows past commit messages, as well as unstaged and untracked commits.
Pro Blazing fast
Fast Git GUI. Everything is already there and loaded when you open up the window.
Pro Allows doing complex things without memorizing git
Git usage beyond basic checkout/commit is arcane; GitUp lets you do things in git in seconds that would take you a half hour of research with the command line.
Pro Full undo
You can backup, or edit commits, if you make a mistake.
Pro Open Source, GPL-licensed
Cons
Con Some git features are missing
There are some key/authentication issues.
Con Slow on large repositories
Con OS X Only
Only available for OSX, so if you are used to working with different OSes and you want the same tools in each of them, it's impossible to have that with GitUp.
Con Font size is not adjustable
Tiny font not good for those with poor vision.