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Signal vs stashcat: catalog facts
Signal	stashcat
Free Free; developed by a nonprofit funded by grants and donations	Paid The site directs organisations to request a quote or consultation.
Android, iOS, Windows, macOS, Linux	Web
End-to-end encryption on every message and call using the open source Signal Protocol No ads, affiliate marketers or tracking	Chat, video calls, and broadcast lists Groups, polls, and appointments
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	Aimed at organisations and requires a sales inquiry
Downloadable app	Web application, Self-hosted, Hosted service
Open source	Closed source
License: AGPL-3.0	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 8, 2026

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