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VK Messenger vs Viber: catalog facts
VK Messenger	Viber
Free Free to use; the app is proprietary.	Free Free to download and use for messages and calls.
Linux, Web	Android
Audio and video calls alongside messaging Transcription of voice and video messages	Voice and video calls plus group chats Chats sync between mobile and desktop
Proprietary and tied to a VK account Mainly useful if your contacts are on VK	Proprietary and centrally run Communities and stickers add clutter for people who only want chat
Downloadable app, Web application	Downloadable app
Closed source	Closed source
License: Proprietary	License not stated
Account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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