File and folder comparison tool offering source control integration, 3-way merge support, and selective synchronization. Supports FTP, cloud, runs offline, uses simple commands for files, customization, and scripting for reporting. Lightweight, portable with CLI and built-in viewer.




Beyond Compare vs Meld Comments
It's one of the most polished and featurefull diff tool, you can do both file and folder diffing, I think there was also a 3 way diff functionality.
Much more configurable than any other alternatives. Faster to compare large directories. Brilliant color coded illustration of differences. Affordable pricing, even for personal use.

- Beyond Compare is Paid and Proprietary



For what it does, it's the best I've used. I regularly synchronize my NAS with copies of this repo on other drives and this involves ~1.7 million files in ~184k folders. It takes about a minute to perform the initial search through all this.
The user interface is very intuitive and easy to understand how to accomplish the task. And it provides many different tools to handle almost anything you might need to do.
Well worth the asking price which is quite affordable.