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Open JTalk vs RHVoice: catalog facts
Open JTalk	RHVoice
Free Free under the Modified BSD license; the listed voice is under CC-BY-3.0.	Free Free and open source.
Linux, Command line	Linux, Android
Converts Japanese text to speech Provides compiled dictionaries in several encodings	Runs locally without a network connection Lightweight statistical parametric synthesis
The project site documents Linux support The listed HTS voice is from 2012	Sounds less natural than neural text-to-speech Language and voice coverage is limited compared with commercial engines
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.