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Viber vs Telegram: catalog facts
Viber	Telegram
Free Free to download and use for messages and calls.	Free The apps are free to download and use.
Android	Windows, macOS, Linux, Android, iOS
Voice and video calls plus group chats Chats sync between mobile and desktop	Chats sync across phones and desktop computers Large groups, channels and bot platform
Proprietary and centrally run Communities and stickers add clutter for people who only want chat	Relies on Telegram's central servers Apps are open source but the server software is not published
Downloadable app	Downloadable app, Hosted service
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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