Compare: Wildmonkey vs ScriptCat

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Metric	Wildmonkey	ScriptCat
User count	8,000	100,000
Average rating	5.00	4.49
Rating count	6	71
Last updated	2026-04-07	2026-07-09
Size	0.02 MB	4.44 MB
Version	0.24.4	1.4.0

Short description	Save and run custom JavaScript or CSS in your browser. Auto-run on page load or trigger with a button. Lightweight userscript manager.	ScriptCat is a browser extension that runs user scripts with cloud sync, subscriptions, a rich API, and an easy editor for script development.
Full summary	Wildmonkey is a lightweight userscript manager that lets you save and execute custom JavaScript directly in the browser. Scripts can be set to run automatically on page load or launched manually with a button. The extension also accepts CSS by converting it to executable JavaScript, making style tweaks easy without extra tooling. Designed for simplicity and speed, Wildmonkey complements DevTools by persisting and managing small, targeted scripts — it is not a drop-in replacement for Greasemonkey and does not support Greasemonkey-specific APIs. Ideal for developers and power users who want a minimal, fast way to run custom code on pages.	ScriptCat is a browser extension that runs user scripts, unlocking powerful automation and customization for your browsing. Built around a framework for executing background scripts and Greasemonkey/Tampermonkey‑style scripts, ScriptCat exposes a rich API and an online editor that makes writing code enjoyable and efficient. Key features include Cloud Sync for easy recovery when changing or reinstalling, Script Subscriptions to organize collections, compatibility with other userscript managers, background scripts that run continuously, scheduled scripts for daily tasks, a sandbox to ensure safety, and an editor with API auto‑completion and ESLint. All of this is wrapped in a polished UI and backed by open source code on GitHub with comprehensive docs at docs.scriptcat.org.