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GoTiengViet vs Fcitx 5: catalog facts
GoTiengViet	Fcitx 5
Freemium Free to download, with a paid license available for the macOS version.	Free Free and open source under the LGPL 2.1 or later.
Windows, macOS, Linux	Linux
Several typing styles and character encodings Converts text between Vietnamese encodings	Supports many languages through numerous input engines Slim core extended with addons
Website is mostly in Vietnamese Linux version depends on IBus	Linux and Unix only Setup involves installing separate engines and configuring the environment
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: LGPL-2.1-or-later
No account 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.