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QQ vs Signal: catalog facts
QQ	Signal
Free The app is offered as a download from the official site.	Free Free; developed by a nonprofit funded by grants and donations
macOS	Android, iOS, Windows, macOS, Linux
Large existing user base in China Combines chat with interest communities	End-to-end encryption on every message and call using the open source Signal Protocol No ads, affiliate marketers or tracking
Interface and site are primarily in Chinese Proprietary service run by Tencent	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
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 20, 2026

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