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Siskin IM vs Beagle IM: catalog facts
Siskin IM	Beagle IM
Free Free; source code is published on GitHub.	Free Free and open source.
iOS	macOS
OMEMO end-to-end encryption Audio and video calls over XMPP	OMEMO end-to-end encryption Audio and video calls
iPhone and iPad only Needs an XMPP account on a server	macOS only Requires an XMPP account on a server
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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