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XKey vs GoTiengViet: catalog facts
XKey	GoTiengViet
Free Free, with source code published on GitHub.	Freemium Free to download, with a paid license available for the macOS version.
macOS	Windows, macOS, Linux
Native macOS input method Documentation in Vietnamese and English	Several typing styles and character encodings Converts text between Vietnamese encodings
macOS only Small single-developer project	Website is mostly in Vietnamese Linux version depends on IBus
Downloadable app	Downloadable app
Closed 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.