Top 12 Open-Source Alternatives to Threema

Product categories

Chat Communication Group Chat & Notifications Group Messaging Instant Messaging Internet Calls Messaging Text Messaging Video Chat

Summary

The top open-source alternatives to Threema are Telegram, Signal, and Tox. 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 128 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
Tox Landing Page
3

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
Element.io Landing Page
4

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
Wickr Landing Page
5

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
Wire Landing Page
6

Wire

Private & Secure Messenger
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 14 social mentions
Discord Landing Page
7

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
Zulip Landing Page
8

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
Briar Landing Page
9

Briar

Secure messaging, anywhere
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Instant Messaging 119 social mentions
Matrix.org Landing Page
10

Matrix.org

Matrix is an open standard for decentralized persistent communication over IP.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 582 social mentions
ChatSecure Landing Page
11

ChatSecure

ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Instant Messaging 2 social mentions
Jami Landing Page
12

J

Jami

Application and Data, Collaboration, and Web and Video Conferencing
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Messaging 9 social mentions