When comparing Online Text Compare vs DiffMerge, the Slant community recommends DiffMerge for most people. In the question“What are the best folder/file compare/diff tools for either OSX, Linux or Windows?” DiffMerge is ranked 8th while Online Text Compare is ranked 22nd. The most important reason people chose DiffMerge is:
DiffMerge is free of charge to download and use for both commercial and open source projects. There's no license needed. However, people who want to contribute to the project monetarily [can do so](https://www.sourcegear.com/diffmerge/register).
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Pros
Pro Unlimited use (No quota)
Pro Online tool
You don't need to install anything on your devices.
Pro Free
Pro Completely free
DiffMerge is free of charge to download and use for both commercial and open source projects. There's no license needed. However, people who want to contribute to the project monetarily can do so.
Pro Cross platform
DiffMerge is cross platform and is available for all major operating systems. This means WIndows, Linux and OSX
Pro Folder compare
Pro Three way merges
DiffMerge supports three way merges.
Cons
Con Startup time can be slow
DiffMerge's startup time can be quite slow sometimes.