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gPodder vs Castbox: catalog facts
gPodder	Castbox
Free Free and open source under the GPL.	Freemium A free ad-supported tier is available. Premium is a paid subscription.
Windows, macOS, Linux	Android, iOS, Web
Downloads to plain files, so any player and any backup tool works Cross-platform with optional subscription sync through gpodder.net	In-audio search finds spoken phrases inside episodes Works on phones, web, Alexa, CarPlay and Android Auto
Plays through external players rather than having a polished built-in one Interface is utilitarian	Advertising and recommendation-heavy interface on the free tier Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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