Mattermost vs Slack

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Mattermost

356
443
+ 1
274
Slack

69.3K
50K
+ 1
6K
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Mattermost vs Slack: What are the differences?

What is Mattermost? Open-source, self-hosted, Slack alternative. Mattermost is modern communication from behind your firewall.

What is Slack? Bring all your communication together in one place. Imagine all your team communication in one place, instantly searchable, available wherever you go. That’s Slack. All your messages. All your files. And everything from Twitter, Dropbox, Google Docs, Asana, Trello, GitHub and dozens of other services. All together.

Mattermost and Slack can be categorized as "Group Chat & Notifications" tools.

Some of the features offered by Mattermost are:

  • All your team communication in one place, searchable and accessible anywhere
  • Slack-compatible, not Slack-limited. Imports Slack channels, users and themes. Offers Slack-compatible webhooks and integrations including Hubot, Jenkins, GitLab and others
  • Self-host ready with System Console and IT admin tools for managing dozens of team sites. Installs with Linux binary, plus Docker, Heroku, AWS, Azure and Cloud Foundry options

On the other hand, Slack provides the following key features:

  • Create open channels for the projects, groups and topics that the whole team shares.
  • Search with context
  • Autocomplete makes mentioning your teammates quick and painless.

"Open source" is the primary reason why developers consider Mattermost over the competitors, whereas "Easy to integrate with" was stated as the key factor in picking Slack.

Mattermost is an open source tool with 15.4K GitHub stars and 3.14K GitHub forks. Here's a link to Mattermost's open source repository on GitHub.

According to the StackShare community, Slack has a broader approval, being mentioned in 4795 company stacks & 3481 developers stacks; compared to Mattermost, which is listed in 38 company stacks and 24 developer stacks.

Decisions about Mattermost and Slack
Kamaldeep Singh

I still use slack, although I prefer discord. It can be intergrated with discord to work with clients who only want to use slack or even any other platform. API integrations are possible over at Discord.

The awful crappy dependency hell of a thing they call an API. Everything sucks. Slack is one of the worst messaging apps I have ever seen. It's incredibly slow and laggy.

Let me rant about everything I hate about slack. Even though I use it as an integration for another platform and will recommend it even though it's horrible as a whole. They are unstoppable towards companies who don't have people technically savvy enough to transition any other software.

It's so bad I am considering making my own mix of discord and slack.

Finding conversations you know you've had - but search is (Still) terrible, and if it was a direct message with a group of people, you have to remember exactly which group of people it was with

Search...absolutely awful. If they could figure out search, Slack would be unstoppable. it got better with ctrl f in conversations, but still isn't there

Badly arranged Chinese buffet of people, conversations, channels, files and links.. and search sucks too.. Break up the people into a separate window so I can have a buddy list ala Communicator or Skype. Give me some freaking organization and curation to the conversations - otherwise it's 1000 person cocktail party with everyone playing drinking games.

AGAIN! Search sucks. Spellcheck is still broken. Too many notifications.

Interface ist inconsistent between devices.

No way to forbid slack to touch my microphone settings (seriously, dont autoadjust my microphone level, it never works and i hate you so much for it)

Still no good screen sharing on linux.

The buggy red dot. Usually shift-esc will clear it (in itself a pain), but now even that hack won't help. The red dot number keep climbing even though I've read everything and used shift-esc.

I miss some features but I wish slack had a little more ability to organize, group channels, and navigate a little better.

user groups need work... If I search for a group, open it, I want to be able to not just see who is online from that group, but also a message button. I'm sick of searching that person, which closes user groups and if that person is actually AFK, I have to search for that group AGAIN and do it again... What a waste of time compared to other tools which are supporting this.

Date stamps needs to be more visible, or give us option in settings to make it more/less visible

Scrolling needs to be improved, I don't want random jumps there. Especially when time and date stamps are so tiny so it takes a while to get oriented again.

I used to really hate slack, but that's mostly because I have to use user groups a lot, most of the time I'm using slack it's to find someone who belongs to some group and message him... and that stuff is still pretty bad, even tho it was changed a bit...

oh and microphone settings... that hurts bad...

It's slow and laggy if you ever used a native program and got used to responsive user interfaces.

You can't remove someone from a call if they join by mistake

(or, to put it another way, if you start a channel call, you should be able to moderate it and remove those from it who are to meant to be there)

Video calls (using the "native" app on macOS) consume so much resources that the whole machine becomes unresponsive. A video call with the same number of people in a true native app is not a problem. So it's not the inherent bandwidth and processing power required. I mostly like Slack but for remote teams this is a problem.

You really want to know what I hate about SLACK...

The inability for the app to BLOCK DIRECT MESSAGING when outside work hours... I work for global company and I constantly get messaged after midnight by morons who think i am up at 3am

It has this Bullcrap Send Anyway function on messages which totally overrides my Do Not Disturb settings if said moron is blind of what time they are sending their damn message... I worked oncall before so the slightest him of my cell at night will wake me up...

Another annoyance on messaging... Idiots who message direct over chatting in the team channel for stuff that should be seen by the whole team working a ticket .... Or classic hey I opened a ticket not two minutes ago ' can someone look at this ticket pleaee' blah blah blah blah ... People who I don't know sending a random 'HI' and no other info about wtfh they are reaching out to me about ...

If SLACK wants to add a function to fix this I want control to block direct messages from anyone truly outside my direct team and line of management that is not a member of a group that can engage onCalls for issues ... I am so sick and tired of this I literally have to uninstall the app everyday to ensure no one bothers me after I am off work and then redownload it before the start of the next day... It's pathetic!

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As it is the communication tool chosen for the course, our team will be using Slack to monitor the course announcements from our instructor as well as to communicate with the instructor and industry partners. The tool for communicating within the team will be Microsoft Teams. Microsoft Teams enables the team to share documents and edit them synchronously(Google Drive is not an option due to one team member's location). Since it also provides a group chat feature, we chose to use it as our communication tool to avoid using too many softwares.

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Hirotaka Ishihara
Undergrad at University of Toronto · | 2 upvotes · 38.4K views

Communication We have chosen two tools for our team communication.

  • Slack

We choose Slack since all of us are familiar with this communication tool. We have a private channel for our team Sphinx for text messages. We added Github apps inside our private channel for repo update notifications. Furthermore, we could contact the subject matter experts within the workspace DCSIL directly for the issues we meet.

  • Microsoft Teams

We use Microsoft Teams for virtual meetings for its fast connection speed. In addition, the call feature in Slack is a paid feature, and we could have virtual meetings and share screens for free in Microsoft Teams.

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Pros of Mattermost
Pros of Slack
  • 54
    Open source
  • 37
    On-premise deployment
  • 25
    Free
  • 22
    Built using golang
  • 19
    Fast and easy to use
  • 14
    Full text search
  • 13
    Docker image provided for easy setup
  • 12
    Built using react
  • 11
    Search and data archiving
  • 9
    Very professional
  • 9
    Supports multiple teams
  • 8
    Keeps us focused, effective, concise
  • 7
    Webhooks support
  • 6
    Integration with Gitlab
  • 6
    Clean and simple look
  • 5
    Well documented
  • 5
    Use #Hashtags like Twitter
  • 3
    Import Slack logs
  • 3
    Reactive community and ease of use
  • 2
    Self managed data
  • 1
    Easy webhook integration
  • 1
    On-premises Deployment
  • 1
    Secure
  • 1
    Slack-compatible integrations
  • 0
    On premise installation
  • 1.2K
    Easy to integrate with
  • 875
    Excellent interface on multiple platforms
  • 845
    Free
  • 691
    Mobile friendly
  • 687
    People really enjoy using it
  • 329
    Great integrations
  • 314
    Flexible notification preferences
  • 196
    Unlimited users
  • 184
    Strong search and data archiving
  • 154
    Multi domain switching support
  • 79
    Easy to use
  • 38
    Beautiful
  • 27
    Hubot support
  • 22
    Unread/read control
  • 20
    Slackbot
  • 18
    Permalink for each messages
  • 17
    Text snippet with highlighting
  • 15
    Quote message easily
  • 14
    Per-room notification
  • 13
    Awesome integration support
  • 12
    IRC gateway
  • 12
    Star for each message / attached files
  • 11
    Good communication within a team
  • 11
    Dropbox Integration
  • 10
    Jira Integration
  • 10
    Slick, search is great
  • 9
    New Relic Integration
  • 8
    Great communication tool
  • 8
    Combine All Services Quickly
  • 8
    Asana Integration
  • 7
    Awesomeness
  • 7
    This tool understands developers
  • 7
    Google Drive Integration
  • 6
    Replaces email
  • 6
    BitBucket integration
  • 6
    XMPP gateway
  • 6
    Twitter Integration
  • 6
    Google Docs Integration
  • 5
    GREAT Customer Support / Quick Response to Feedback
  • 5
    Jenkins Integration
  • 5
    Guest and Restricted user control
  • 4
    Gathers all my communications in one place
  • 4
    Excellent multi platform internal communication tool
  • 4
    GitHub integration
  • 4
    Mention list view
  • 3
    Easy to start working with
  • 3
    Visual Studio Integration
  • 3
    Perfect implementation of chat + integrations
  • 3
    Easy
  • 3
    Easy to add a reaction
  • 3
    Clean UI
  • 3
    Timely while non intrusive
  • 3
    Great on-boarding
  • 3
    Threaded chat
  • 2
    Intuitive, easy to use, great integrations
  • 2
    Simplicity
  • 2
    Great interface
  • 2
    So much better than email
  • 2
    Message Actions
  • 2
    Great Channel Customization
  • 2
    It's basically an improved (although closed) IRC
  • 2
    Eases collaboration for geographically dispersed teams
  • 2
    Android app
  • 1
    Great API
  • 1
    Very customizable
  • 1
    API
  • 1
    Easy remote communication
  • 1
    Get less busy
  • 1
    Targetprocess integration
  • 1
    Better User Experience
  • 1
    Finally with terrible "threading"—I miss Flowdock
  • 1
    Archive Importing
  • 1
    Great Support Team
  • 1
    Complete with plenty of Electron BLOAT
  • 1
    Markdown
  • 1
    Multi work-space support
  • 1
    Flexible and Accessible
  • 1
    Travis CI integration
  • 1
    It's the coolest IM ever
  • 1
    I was 666 star :D
  • 1
    Community
  • 1
    Dev communication Made Easy
  • 1
    Integrates with just about everything
  • 0
    Easy to useL
  • 0
    Platforms

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Cons of Mattermost
Cons of Slack
  • 1
    Basic permissions only in enterprise edition
  • 1
    Custom sidewide themes only in enterprise
  • 1
    Many basic features are enterprise only
  • 1
    Less integrations and plugins than slack
  • 12
    Can be distracting depending on how you use it
  • 6
    Requires some management for large teams
  • 5
    Limit messages history
  • 4
    Too expensive
  • 4
    You don't really own your messages
  • 3
    Too many notifications by default

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- No public GitHub repository available -

What is Mattermost?

Mattermost is modern communication from behind your firewall.

What is Slack?

Imagine all your team communication in one place, instantly searchable, available wherever you go. That’s Slack. All your messages. All your files. And everything from Twitter, Dropbox, Google Docs, Asana, Trello, GitHub and dozens of other services. All together.

Need advice about which tool to choose?Ask the StackShare community!

What companies use Mattermost?
What companies use Slack?

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What tools integrate with Mattermost?
What tools integrate with Slack?

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Blog Posts

Sep 29 2020 at 7:36PM
https://img.stackshare.io/company/165617/cbd54fc70c90bdc732b07283f2a61ca8fb8980bd.png logo

WorkOS

PythonSlackG Suite+17
6
2009
SlackOptimizely Rollouts+2
1
853
GitHubPythonReact+42
46
38422
What are some alternatives to Mattermost and Slack?
RocketChat
Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework. It is a great solution for communities and companies wanting to privately host their own chat service or for developers looking forward to build and evolve their own chat platforms.
Riot
Riot brings custom tags to all browsers. Think React + Polymer but with enjoyable syntax and a small learning curve.
HipChat
HipChat is a hosted private chat service for your company or team. Invite colleagues to share ideas and files in persistent group chat rooms. Get your team off AIM, Google Talk, and Skype — HipChat was built for business.
Gitter
Free chat rooms for your public repositories. A bit like IRC only smarter. Chats for private repositories as well as organisations.
Zulip
Zulip is powerful, open source team chat that combines the immediacy of real-time chat with the productivity benefits of threaded conversations. Zulip allows busy managers and others in meetings all day to participate in their teams chats.
See all alternatives
Interest over time
How much does Mattermost cost?
How much does Slack cost?
Pricing unavailable