Alternatives to ScriptCat
A userscript manager extension compatible with Tampermonkey scripts that can also run background scripts. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
ScriptCat
A userscript manager extension compatible with Tampermonkey scripts that can also run background scripts.
Replacements
Listings that take over the same core job as ScriptCat.
Tampermonkey
Userscript manager for running custom scripts on websites.
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.
Violentmonkey
Open-source userscript manager with cloud backup.
Violentmonkey is open source under MIT with cloud backup through your own storage, but does not offer ScriptCat's background scripts or extended APIs.
Greasemonkey
A Firefox extension that runs user scripts to change how web pages look and behave.
Greasemonkey is a long-established open-source manager for Firefox only, with a built-in editor and automatic updates, but releases are infrequent and background scripts are absent.
Userscripts
An open-source userscript and userstyle manager for Safari on macOS and iOS.
Userscripts is an open-source manager for Safari on macOS and iOS that handles user styles too, and scripts from other managers may need adjustments.
Similar software
Related functionality, not a direct replacement.
