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