When comparing GitUp vs TortoiseGit, the Slant community recommends GitUp for most people. In the question“What are the best visual git GUIs?” GitUp is ranked 7th while TortoiseGit is ranked 11th.
Ranked in these QuestionsQuestion Ranking
Pro Open Source, GPL-licensed
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 Blazing fast
Fast Git GUI. Everything is already there and loaded when you open up the window.
Pro Open source
Licensed under GPL.
Pro Windows context menu integration
Context menu enables access to common commands quickly.
Pro Can parse and provide a pretty log of all commits or filter by branch
Pro Convinient blaming tool
Very friendly blame tool. Easy to walk in the history of a file.
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.
Con Renames git commands
Makes things hard to find for people used to the git CLI.
Con Windows only
No Linux or OSX versions available.
Con Buggy file status icons
The file icons are also often buggy and do not reflect its true status. Often times the icon is missing and makes you think a file or folder is untracked, when it is already staged, or sometimes even already committed and pushed.
Con May clutter your Windows Explorer
If you have synced your dev folder to a cloud service, TortoiseGit's git status file icons will override your cloud provider's icons.