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Fcitx 5 vs Squirrel: catalog facts
Fcitx 5	Squirrel
Free Free and open source under the LGPL 2.1 or later.	Free Free and open source, with optional donations to the developer.
Linux	macOS
Supports many languages through numerous input engines Slim core extended with addons	Many Chinese input schemes, from Pinyin to Cangjie and Jyutping Custom input schemes can be written and shared
Linux and Unix only Setup involves installing separate engines and configuring the environment	Configuration is done through text files and takes some learning Documentation is mainly in Chinese
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1-or-later	License not stated
No account needed	No account needed
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.