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GoTiengViet vs Keyman: catalog facts
GoTiengViet	Keyman
Freemium Free to download, with a paid license available for the macOS version.	Free Free and open source on all platforms.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS, Web
Several typing styles and character encodings Converts text between Vietnamese encodings	Keyboards for over 2,500 languages Available on desktop, mobile and web
Website is mostly in Vietnamese Linux version depends on IBus	Layouts must be found and installed separately for each language
Downloadable app	Downloadable app, Web application
Closed source	Open source
License not stated	License not stated
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.