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Beagle IM vs Siskin IM: catalog facts
Beagle IM	Siskin IM
Free Free and open source.	Free Free; source code is published on GitHub.
macOS	iOS
OMEMO end-to-end encryption Audio and video calls	OMEMO end-to-end encryption Audio and video calls over XMPP
macOS only Requires an XMPP account on a server	iPhone and iPad only Needs 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.