Alternatives

Products that do what Mattermost 1.0 does

Open source Slack alternative

1
Mattermost▲126
Open source, on-premises, Slack alternative
2015
2
Matterhorn▲163
Simple and light-weight project management tool
2015
3
Matterwiki▲227
A simple, beautiful, and open source wiki for teams
2017
4
Feedback Friday by Matter for Slack▲171
Recognize teammates with Kudos, feedback, & rewards in Slack
2021
5
Total.js Messenger▲181
A small, open-source alternative to Slack
2017
6MY
Matterhorn – Your new project manager▲298
2015 · matterhorn.io
7
Matter 2.0▲346
Build stronger, happier remote team culture
2021
8
Node.js Messenger▲140
A small alternative to Slack
2017
9
Baremetrics Messaging▲224
SaaS messaging tool to onboard, engage & retain customers
2020
10
Buzz▲161
Your people, your agents, your project — all in one place
Jul 2026 · buzz.xyz
11
HiveFlux + Slack▲93
Real-time task management meets real-time communication
2015
12
SSOReady▲144
Open source developer tools for enterprise single sign-on
2024
13
Abbot▲217
Automation for customer-facing teams in Slack
2022
14
Conversational GitHub Project Management▲78
Track, report and automate GitHub workflows in Slack. Free
2020
15
Spaces▲133
Slack's first acquisition: all-in-one documents for teams
2014
16
Baremetrics for Slack▲239
Subscription analytics, insights & notifications in Slack
2016
17
Manageyum▲253
One desktop app for Trello, Slack, Zendesk, Intercom & more.
2016
18
Slack Gitsin▲115
A beautiful Slack command line interface
2016
19
Contentful▲108
The API-driven CMS: Manage content once, publish it anywhere
2014
20
Fluxer▲154
Open-source Discord-like instant messaging & VoIP platform
Jan 2026
21
Range▲261
Build successful teams with Range.
2019
22
Beacon▲130
Write, run and share SQL in Slack
2020
23
Magik▲207
Digital HQ for your team on Slack
2022
24
Hey for Slack▲133
Make your community feel welcomed
2022

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