Top 6 Open-Source Alternatives to Output Messenger

Product categories

CRM CRM Platforms Chat Communication Corporate Intranets Group Chat & Notifications Group Messaging Instant Messaging Internet Calls Intranet Messaging Work Collaboration

Summary

The top open-source alternatives to Output Messenger are LAN Messenger, Signal, and Mattermost. 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.

LAN Messenger Landing Page
1

LAN Messenger

LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Pricing:
- Open Source
#Communication #Group Chat & Notifications #Work Collaboration
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
Mattermost Landing Page
3

Mattermost

Mattermost is an open source alternative to Slack.
Pricing:
- Open Source
#Team Collaboration #Work Collaboration #Web And Video Conferencing 59 social mentions
Rocket.Chat Landing Page
4

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
Telegram Landing Page
5

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
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