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WhatsApp vs ZapZap: catalog facts
WhatsApp	ZapZap
Free Free to use for personal messaging and calls.	Free Free and open source under the GPL-3.0-or-later licence.
Windows, macOS, Android, iOS, Web	Linux
End-to-end encrypted messages and calls Available on phones, desktop and the web	Multiple WhatsApp accounts in one app Native desktop notifications
Proprietary and tied to a phone number account Relies on a central service run by the developer	Unofficial client that depends on WhatsApp's web service Requires a WhatsApp account on a phone
Downloadable app, Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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