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Karere vs Ferdium: catalog facts
Karere	Ferdium
Free Free and open source under the GPL version 3 or later.	Free Free and open source under Apache 2.0. Unlike Franz, the project states it does not…
Linux	Windows, macOS, Linux
Several WhatsApp accounts in isolated sessions Native GTK4 window instead of a browser tab	Hundreds of services supported, with workspaces to group them No paid account or usage restrictions, unlike the Franz it forked from
Unofficial client that depends on WhatsApp Web Requires a WhatsApp account	Each service is a web view, so memory use grows quickly with many services Service integrations break when a provider changes its web app
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: Apache-2.0
Account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

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