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Sogou Input Method vs Squirrel: catalog facts
Sogou Input Method	Squirrel
Free Free to download from the official site.	Free Free and open source, with optional donations to the developer.
macOS	macOS
Supports full and double pinyin Large built-in vocabulary	Many Chinese input schemes, from Pinyin to Cangjie and Jyutping Custom input schemes can be written and shared
Website is in Chinese only Closed source	Configuration is done through text files and takes some learning Documentation is mainly in Chinese
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.