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Parolu vs Balabolka: catalog facts
Parolu	Balabolka
Free Free and open source under the GPL 3.0 or later.	Free Freeware, funded by sales of the developer's Cross+A software.
Linux	Windows, Command line
Simple interface for reading text aloud Includes Esperanto voices out of the box	Uses any installed system voice Opens many document and ebook formats
Voices for most languages must be downloaded first Project documentation is mainly in German	Windows only Voice quality depends on the installed speech engines
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License: Freeware
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 September 26, 2026

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