When comparing Ungit vs GitFiend, the Slant community recommends Ungit for most people. In the question“What are the best visual git GUIs?” Ungit is ranked 15th while GitFiend is ranked 27th. The most important reason people chose Ungit is:
Ungit is open source software available under the MIT Licence.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Free and Open Source Software
Ungit is open source software available under the MIT Licence.

Pro Cross-platform
Works on Windows, Linux, and OS X.
Pro Optional Integration with Modern Text Editors
Ungit can be integrated directly into modern text editors, Atom, Brackets, and VS Code.
Pro Web-based interface
Ungit is web-based, meaning you can run it on your cloud/pure shell machine and then use the UI from your browser.
Pro Cross platform
It has native Linux, Windows and Mac clients.
Pro Free
As of version 0.38.2 there is no paid features or license.
Cons
Con Node.js dependent

Con Setup is not user-friendly
Ungit is distributed as an NPM package and requires git and Node.js to be installed on your system before you can run it. Ungit must be launched by running ungit
in a command line terminal.
Con Exposes git commands to your network
No authentication, if someone can communicate with your computer on the port this is running on, they can execute any git command they want on your repos as well as view your filesystem's folders.
Con Limited features
As it is in a new application in development it has a limited feature set if you are a power user.
Con Not open-source
Developer has shared the UI components to GitHub but not the source code of the application.
