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Threema vs Quicall: catalog facts
Threema	Quicall
Paid A one-time purchase is required. Business plans are separate.	Free Free to download, with source published under the AGPL.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux, Android, iOS
No phone number or email required; the ID is random Apps are open source and the company is based in Switzerland	Chat, voice and video calls in one app Clients for mobile and desktop platforms
A one-time purchase is required for each platform Smaller user base than the mainstream encrypted messengers	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
Not stated if an account is needed	Not stated if an account is 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 2, 2026

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