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Signal vs Quicall: catalog facts
Signal	Quicall
Free Free; developed by a nonprofit funded by grants and donations	Free Free to download, with source published under the AGPL.
Android, iOS, Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS
End-to-end encryption on every message and call using the open source Signal Protocol No ads, affiliate marketers or tracking	Chat, voice and video calls in one app Clients for mobile and desktop platforms
Requires a phone number that can receive an SMS or phone call to register Desktop app requires Signal to be installed on a phone first	Branding is inconsistent across the website, app and repository Small project with little public documentation
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: AGPL-3.0-or-later
Account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 2, 2026

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