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Open source CVS (Concurrent Versions System) alternatives: 3 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rank

3 of the 5 CVS (Concurrent Versions System) alternatives we track are open source. Fossil, Mercurial and Jujutsu (jj) rank highest, with facts last verified Nov 8, 2026.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1FoFossilOpen source—YesWindows, macOS, Linux +15 of 574.4
2Mercurial logoMercurialOpen source—YesWindows, macOS, Linux4 of 461.8
3Jujutsu (jj) logoJujutsu (jj)Open source—YesWindows, macOS, Linux5 of 554.5
  1. Fo

    1. FossilTop pick

    Best for: Small teams and solo developers who want code, tickets and wiki in one self-hosted file

    Open sourceSelf-hostableWindows, macOS, Linux, Self-hosted

    74.4

    score / 100

    Why switch from CVS (Concurrent Versions System)

    Single-file distributed VCS with built-in wiki and bug tracker, easy to self-host.

    Pros

    • Bug tracker, wiki, forum and web UI built into the repository
    • Single executable and SQLite storage make install and backup easy
    • Light enough to self-host on a cheap VPS or Raspberry Pi
    • Permissive 2-clause BSD licence

    Cons

    • Small community and few third-party tools or integrations
    • Mainstream code hosts only support it through a Git mirror
    • Deliberately limits history rewriting, which Git users may miss
    Visit Fossil Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    Reviews ×0.363
    Clicks (90 days) ×0.15100
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Fossil a good CVS (Concurrent Versions System) alternative?

    Verified facts

    5 of 5 verified
    License
    2-clause BSD
    Checked Nov 8, 2026fossil-scm.org(opens source in a new tab)
    Built-in tools
    Bug tracking, wiki, forum, chat
    Checked Nov 8, 2026fossil-scm.org(opens source in a new tab)
    Install
    Single executable
    Checked Nov 8, 2026fossil-scm.org(opens source in a new tab)
    Storage
    SQLite database
    Checked Nov 8, 2026fossil-scm.org(opens source in a new tab)
    Platforms
    Linux, Mac, Windows
    Checked Nov 8, 2026fossil-scm.org(opens source in a new tab)
  2. Mercurial logo

    2. Mercurial

    Best for: Teams that want distributed version control with a simpler, safer command line than Git

    Open sourceWindows, macOS, Linux

    61.8

    score / 100

    Why switch from CVS (Concurrent Versions System)

    Distributed like Git but with a simpler command set that CVS users find familiar.

    Pros

    • Consistent, smaller command set that is easier to learn
    • Powerful features stay opt-in through extensions
    • Full local history makes most operations fast and offline
    • Free software under the GPLv2 or later

    Cons

    • GitHub and GitLab.com don't host Mercurial repositories
    • Far smaller ecosystem of GUIs, integrations and tutorials than Git
    • Fewer developers already know it, so onboarding takes more effort
    Visit Mercurial Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Mercurial a good CVS (Concurrent Versions System) alternative?

    Verified facts

    4 of 4 verified
    License
    GPLv2 or later
    Checked Nov 8, 2026mercurial-scm.org(opens source in a new tab)
    Type
    Distributed source control
    Checked Nov 8, 2026mercurial-scm.org(opens source in a new tab)
    Local history
    Every clone has full history
    Checked Nov 8, 2026mercurial-scm.org(opens source in a new tab)
    Extensions
    Yes
    Checked Nov 8, 2026mercurial-scm.org(opens source in a new tab)
  3. Jujutsu (jj) logo

    3. Jujutsu (jj)

    Best for: Developers who want a simpler, safer workflow while still pushing to Git hosts

    Open sourceWindows, macOS, Linux

    54.5

    score / 100

    Why switch from CVS (Concurrent Versions System)

    A modern VCS with simple commands and an undo log that stores repos in Git format, so they work with GitHub and other Git hosts.

    Pros

    • Works on existing Git repos, so teammates don't have to switch
    • Operation log makes any command undoable
    • Conflicts can be recorded and resolved later instead of blocking a rebase
    • Free and Apache 2.0 licensed

    Cons

    • Command-line only, with GUI support coming from third-party tools
    • No Git submodule or Git LFS support yet
    • New concepts take time to learn for long-time Git users
    Visit Jujutsu (jj) Details and reviews
    How this score is calculated
    Editorial fit ×0.353
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Jujutsu (jj) a good CVS (Concurrent Versions System) alternative?

    Verified facts

    5 of 5 verified
    License
    Apache-2.0
    Checked Nov 2, 2026github.com(opens source in a new tab)
    Git compatible
    Yes, uses a Git repo backend
    Checked Nov 8, 2026jj-vcs.github.io(opens source in a new tab)
    Platforms
    Windows, Mac, Linux
    Checked Nov 8, 2026jj-vcs.github.io(opens source in a new tab)
    Git LFS
    Not supported
    Checked Nov 8, 2026jj-vcs.github.io(opens source in a new tab)
    Submodules
    Not supported
    Checked Nov 8, 2026jj-vcs.github.io(opens source in a new tab)