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Dino vs Siskin IM: catalog facts
Dino	Siskin IM
Free Free and open source under the GPL.	Free Free; source code is published on GitHub.
Linux	iOS
Clean desktop client for a federated protocol with OMEMO encryption Supports calls and file transfer, not only text	OMEMO end-to-end encryption Audio and video calls over XMPP
Linux focused; other platforms need third-party builds Behaviour depends on the server's feature support	iPhone and iPad only Needs an XMPP account on a server
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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