Top 12 Open-Source Alternatives to Slack for Mac

Product categories

Chat Cloud Storage Code Collaboration Code Coverage Communication Group Chat & Notifications Instant Messaging Messaging Productivity Project Management Task Management Work Collaboration

Summary

The top open-source alternatives to Slack for Mac are Mattermost, Element.io, and Matrix.org. 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.

Mattermost Landing Page
1

Mattermost

Mattermost is an open source alternative to Slack.
Pricing:
- Open Source
#Team Collaboration #Work Collaboration #Web And Video Conferencing 59 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
Matrix.org Landing Page
3

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
Basecamp Landing Page
4

Basecamp

A simple and elegant project management system.
Pricing:
- Paid
- Free Trial
- $99.0 / Monthly (flat price)
#Project Management #Productivity #Task Management 37 social mentions
GitHub + Slack Integration Landing Page
5

GitHub + Slack Integration

Full visibility into your GitHub projects right inside Slack
Pricing:
- Open Source
#Code Coverage #Project Management #Code Collaboration 3 social mentions
Zulip Landing Page
6

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
Slack Themes Landing Page
7

ST

Slack Themes

Make your Slack pretty with custom themes
Pricing:
- Open Source
#Email #Email Clients #Communication 1 social mentions
Twake Landing Page
8

Twake

Be more productive with Twake : the collaborative work platform to organize and manage all your projects on a single platform.
Pricing:
- Open Source
- Freemium
- Free Trial
#Project Management #Office Suites #Task Management 16 social mentions
Telegram Desktop Landing Page
9

Telegram Desktop

Fast and secure desktop messaging app, now updated
Pricing:
- Open Source
#Communication #Messaging #Community Platform 55 social mentions
Relativ Landing Page
10

Relativ

Build your own advanced VR headset for $100
Pricing:
- Open Source
#Virtual Reality #Communication #Oculus Rift
Leantime Landing Page
11

Leantime

Lean project management for startups & small teams
Pricing:
- Open Source
#Project Management #Task Management #Productivity 18 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