Alternatives to Tampermonkey

Userscript manager for running custom scripts on websites. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Tampermonkey.

  • Violentmonkey

    Open-source userscript manager with cloud backup.

    FreeOpen sourceBrowser extension

    Violentmonkey is fully open source under MIT and syncs scripts through storage you own, though its compatibility surface is slightly smaller for exotic scripts.

Also worth comparing

These listings name Tampermonkey as their own alternative, so the relationship runs both ways.

  • Greasemonkey

    A Firefox extension that runs user scripts to change how web pages look and behave.

    FreeOpen sourceBrowser extension

    Tampermonkey runs the same scripts across every major browser rather than Firefox only, with backups and an editor, but it is closed source.

  • ScriptCat

    A userscript manager extension compatible with Tampermonkey scripts that can also run background scripts.

    FreeOpen sourceBrowser extension

    Tampermonkey runs the same scripts across every major browser with backups and an editor, but it is closed source and lacks ScriptCat's background scripts.

  • Userscripts

    An open-source userscript and userstyle manager for Safari on macOS and iOS.

    FreeOpen sourcemacOSiOSBrowser extension

    Tampermonkey runs the same scripts across every major browser and adds script updates, backups and a built-in editor, but it is closed source and does not manage user styles.

Similar software

Related functionality, not a direct replacement.