Top 12 Open-Source Alternatives to Mattermost

Product categories

Audio Conferencing CRM CRM Platforms Chat Chat SDK Communication Group Chat & Notifications Instant Messaging Messaging Project Management Task Management Work Collaboration

Summary

The top open-source alternatives to Mattermost are Telegram, Element.io, and Discord. 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
Element.io Landing Page
2

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
Discord Landing Page
3

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
4

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
Matrix.org Landing Page
5

Matrix.org

Matrix is an open standard for decentralized persistent communication over IP.
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Instant Messaging 582 social mentions
Bitrix24 Landing Page
6

Bitrix24

Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
Pricing:
- Open Source
- Freemium
- Free Trial
- $69.0 / Monthly (6 users / 50 GB / CRM+)
#Project Management #Task Management #Communication
Tox Landing Page
7

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
MirrorFly Landing Page
8

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
sdelements.github.io
9

Lets Chat

Open source self-hosted chat app for small teams
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Team Collaboration 1 social mentions
Notion Landing Page
10

Notion

All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Pricing:
- Open Source
#Productivity #Work Collaboration #Note Taking 438 social mentions
Revolt.chat Landing Page
11

Revolt.chat

Don't bother with chat apps that don't respect your privacy. Revolt is a brand new chat platform designed around you.
Pricing:
- Open Source
#Communication #Live Chat #Group Chat & Notifications 87 social mentions
Flow Landing Page
12

Flow

Stop managing projects from your inbox.
Pricing:
- Open Source
#Project Management #Task Management #Work Collaboration 1 social mentions