When comparing DiffMerge vs BBEdit, the Slant community recommends BBEdit for most people. In the question“What are the best folder/file compare/diff tools for either OSX, Linux or Windows?” BBEdit is ranked 7th while DiffMerge is ranked 8th. The most important reason people chose BBEdit is:
BBEdit is commercial software, the paid counterpart to their free application Textwrangler. Though BBEdit comes off as pricey, this allows for stable and consistent updates from the developers. BBEdit has been around since 1992.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
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.
Pro Stable development, been around for decades
BBEdit is commercial software, the paid counterpart to their free application Textwrangler. Though BBEdit comes off as pricey, this allows for stable and consistent updates from the developers. BBEdit has been around since 1992.
Pro Can open very large files
Pro Just about every feature is already built in
No searching for plug-ins that may or may not work.
Pro Great customer support
The developer is very responsive to bug reports and feature suggestions.
Pro Native application
Follows platform standards.
Pro Built-in FTP/SFTP browser
BBEdit can open files directly from, and save them to, any available FTP server. It can also open and save files directly via SFTP (SSH File Transfer Protocol).
Pro Great JAMStack environment
You can build the static site of your dreams without needing any external assistants. Although it does not process LESS, SASS, or SCSS files, BBEdit's includes are very powerful.
Cons
Con Startup time can be slow
DiffMerge's startup time can be quite slow sometimes.
Con Featureless
Con Expensive
It's US$49.99 a single user license.