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Viber vs Messenger: catalog facts
Viber	Messenger
Free Free to download and use for messages and calls.	Free Free to use with a Meta account.
Android	Web
Voice and video calls plus group chats Chats sync between mobile and desktop	Reaches people who already use Facebook Messaging and video calls in one place
Proprietary and centrally run Communities and stickers add clutter for people who only want chat	Requires a Meta account Closed source and run by an advertising company
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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