Viber is a cross‑platform messaging app offering voice/video calls, group chats, and stickers. Below is a curated list of 20 free instant‑messaging solutions that can serve as alternatives, each with its own strengths in privacy, feature set, or platform support.
Get targeted exposure with custom position pinning and highlighted placement.
Widely used mobile messenger with end‑to‑end encryption, voice/video calls, and group chats (up to 1024 participants).
Cloud‑based app featuring large group limits (200k members), secret chats with self‑destruct timers, and extensive bot ecosystem.
Open‑source, privacy‑focused messenger with strong end‑to‑end encryption for messages, calls, and media.
Feature‑rich platform popular in Asia offering stickers, timelines, voice/video calls, and a built‑in digital wallet.
All‑in‑one Chinese app supporting text, voice/video calls, Moments, payments, and mini‑programs.
Originally for gamers, now a community hub with text/voice channels, screen sharing, and robust moderation tools.
Microsoft’s classic messenger offering video calls, screen sharing, and integration with Office 365.
Integrated with Facebook, provides text, voice/video calls, AR effects, and chatbot support.
Simple group‑chat app owned by Meta, with SMS fallback and easy member invites via phone numbers.
Open‑source Matrix client delivering decentralized, encrypted chats, voice/video rooms, and bridge to other networks.
Secure collaboration tool with end‑to‑end encrypted messaging, voice/video calls, and file sharing for teams.
Team‑focused messenger with searchable history (10k messages), integrations, and channel organization.
Part of Google Workspace, offers direct messaging, group rooms, and integration with Google Docs/Drive.
Open‑source self‑hosted chat platform with real‑time translation, video conferencing, and extensive customization.
Self‑hosted, open‑source alternative to Slack with strong security controls and unlimited message history.
Threaded open‑source chat that combines real‑time and asynchronous messaging for organized discussions.
Decentralized, peer‑to‑peer messenger with end‑to‑end encryption, video calls, and no central server.
Privacy‑first messenger built on the Oxen network, offering onion‑routing and no phone number requirement.
Open‑source, fully encrypted, peer‑to‑peer instant messenger with voice and video capabilities.
Secure, self‑destructing messaging app with end‑to‑end encryption for texts, voice, and file sharing.