Top 12 Open-Source Alternatives to Viber

The top open-source alternatives to Viber are Telegram, Signal, and Element.io. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Telegram Landing Page
1

Telegram

Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Pricing:
- Open Source
#Communication #Messaging #Instant Messaging 129 social mentions
Signal Landing Page
2

Signal

Fast, simple & secure messaging. Privacy that fits in your pocket.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 180 social mentions
Element.io Landing Page
3

Element.io

Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
Pricing:
- Open Source
- Free
#Group Chat & Notifications #Communication #Chat 1 social mentions
Wire Landing Page
4

Wire

Private & Secure Messenger
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 14 social mentions
Discord Landing Page
5

Discord

Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 122 social mentions
Tox Landing Page
6

Tox

Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Instant Messaging 28 social mentions
Zulip Landing Page
7

Zulip

Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 50 social mentions
Mattermost Landing Page
8

Mattermost

Mattermost is an open source alternative to Slack.
Pricing:
- Open Source
#Team Collaboration #Work Collaboration #Web And Video Conferencing 59 social mentions
Wickr Landing Page
9

Wickr

Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender...
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 5 social mentions
Rocket.Chat Landing Page
10

Rocket.Chat

Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Chat 65 social mentions
MirrorFly Landing Page
11

MirrorFly

World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises
Pricing:
- Open Source
- Paid
- Free Trial
#Communication #Chat SDK #Group Chat & Notifications 8 user reviews
Conversations.im Landing Page
12

Conversations.im

XMPP client designed with ease of use and security in mind
Pricing:
- Open Source
#Group Chat & Notifications #Communication #Instant Messaging 34 social mentions