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Balabolka vs Parolu: catalog facts
Balabolka	Parolu
Free Freeware, funded by sales of the developer's Cross+A software.	Free Free and open source under the GPL 3.0 or later.
Windows, Command line	Linux
Uses any installed system voice Opens many document and ebook formats	Simple interface for reading text aloud Includes Esperanto voices out of the box
Windows only Voice quality depends on the installed speech engines	Voices for most languages must be downloaded first Project documentation is mainly in German
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: GPL-3.0-or-later
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 1, 2026

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