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Parolu vs Open JTalk: catalog facts
Parolu	Open JTalk
Free Free and open source under the GPL 3.0 or later.	Free Free under the Modified BSD license; the listed voice is under CC-BY-3.0.
Linux	Linux, Command line
Simple interface for reading text aloud Includes Esperanto voices out of the box	Converts Japanese text to speech Provides compiled dictionaries in several encodings
Voices for most languages must be downloaded first Project documentation is mainly in German	The project site documents Linux support The listed HTS voice is from 2012
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: BSD-3-Clause
Not stated if an account is 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 8, 2026

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