SourceTree vs TortoiseGit: What are the differences?
Developers describe SourceTree as "A free Git GUI client for Windows and macOS". Use the full capability of Git and Mercurial in the SourceTree desktop app. Manage all your repositories, hosted or local, through SourceTree's simple interface. On the other hand, TortoiseGit is detailed as "The Power of Git in a Windows Shell". It is a Git revision control client, implemented as a Windows shell extension and based on TortoiseSVN. It is free software released under the GNU General Public License.
SourceTree and TortoiseGit are primarily classified as "Source Code Management Desktop Apps" and "Git" tools respectively.