Mercurial (`hg`) stores changesets with efficient delta compression and supports clone/branch/pull workflows like GitA distributed version control system — commits, branches, and merges for tracking source code history.. MozillaThe organization behind Firefox — advocates open web standards and internet privacy., FacebookThe social network founded by Mark Zuckerberg — grew into Meta and reshaped online advertising., and PythonA high-level language known for readability — dominant in data science, scripting, and web backends. used it before GitA distributed version control system — commits, branches, and merges for tracking source code history. dominated. BitbucketAtlassian's Git hosting service — repos, pull requests, and CI pipelines for development teams. built on Mercurial for years. Example: `hg clone`, edit, `hg commit`, `hg push` to a central or peer repo.

Mercurial was GitA distributed version control system — commits, branches, and merges for tracking source code history.'s main rival in the 2005 distributed VCS race after BitKeeper withdrew.

It proved multiple DVCS designs could work at scale and kept competition alive during the GitA distributed version control system — commits, branches, and merges for tracking source code history. adoption wave.