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Keyman vs GoTiengViet: catalog facts
Keyman	GoTiengViet
Free Free and open source on all platforms.	Freemium Free to download, with a paid license available for the macOS version.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux
Keyboards for over 2,500 languages Available on desktop, mobile and web	Several typing styles and character encodings Converts text between Vietnamese encodings
Layouts must be found and installed separately for each language	Website is mostly in Vietnamese Linux version depends on IBus
Downloadable app, Web application	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it 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.