Mattermost vs RocketChat vs Slack

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

Mattermost

377
464
+ 1
275
RocketChat

331
456
+ 1
316
Slack

79K
59.2K
+ 1
6K
Advice on Mattermost, RocketChat, and Slack
Needs advice
on
Slack
Discord
and
Gitter

From a StackShare Community member: “We’re about to start a chat group for our open source project (over 5K stars on GitHub) so we can let our community collaborate more closely. The obvious choice would be Slack (k8s and a ton of major projects use it), but we’ve seen Gitter (webpack uses it) for a lot of open source projects, Discord (Vue.js moved to them), and as of late I’m seeing Spectrum more and more often. Does anyone have experience with these or other alternatives? Is it even worth assessing all these options, or should we just go with Slack? Some things that are important to us: free, all the regular integrations (GitHub, Heroku, etc), mobile & desktop apps, and open source is of course a plus."

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Replies (4)
Arnaud Lemercier
Expert En Dveloppement Web Et Systmes Dinformations, Designer UX, UI, Co-grant at Wixiweb · | 4 upvotes · 119.4K views
Recommends
Discord
at

We use Discord to tracking some action and errors (logs / alerting / assertion). it's free and simple to use with mobile application et notifications

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Rebecca Driscoll
Recommends
Slack
at

We use Slack to increase productivity by simplifying communication and putting Slack in the middle of our communication workflow #Communications #Collaboration

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Michael Ionita
Recommends
Slack
at

We use Slack because we can let "tools talk to us" and automate processes in our dev team using bots.

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Julien Tanay
Lead DevOps. Every day product hacker. at Dior · | 2 upvotes · 116K views
Recommends
Discord
at

Our Discord Server is our n°1 community stop; we gather feedback from our users from here, discuss about new features, announce new releases, and so on.

We even use it for internal meetings and calls !

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Decisions about Mattermost, RocketChat, and Slack
Christopher Semmler
CEO at Leonis Holding · | 2 upvotes · 7K views

Mattermost sports higher performance, uses Postgres, is a pure server side application not using uo too much resources on the client side and in general gives an overall enterprise grade impression.

Updates go smooth without a hassle, everything is logical, and the integration in the OS is absolutely stable. Apart from that, the underlying runtimes and code are mature, proven and stable.

The developers are maybe a bit more cautious regarding introducing new features, but they maintain a stable experience, not breaking the codebase in order to hastily implement new features, which are not yet ready for production. Documentation and debugging are fantastic, so running this in enterprise production environment is absolutely approved of.

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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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Pros of Mattermost
Pros of RocketChat
Pros of Slack
  • 54
    Open source
  • 38
    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
  • 70
    Open source
  • 37
    Can be deployed on premise
  • 32
    Byos (bring your own server)
  • 30
    Faster than Slack
  • 20
    Mobile app for iphone, ipad, and ipod touch
  • 19
    Built using meteor
  • 19
    Desktop client for mac and windows
  • 13
    Easily deployed on Cloud Services (Heroku, etc)
  • 10
    Screen Sharing
  • 9
    Excellent support & service, bar-none
  • 6
    Video and audio
  • 5
    Open source
  • 5
    Amazing product, fast moving development, and BYOS
  • 5
    Web client
  • 5
    Multiple Security integrations - LDAP etc
  • 5
    Docker Image for easy setup
  • 5
    Mobile app for android phone, tablet, and tv stick
  • 4
    Datacontrol
  • 4
    Great development team
  • 4
    Free
  • 2
    Love it - running on R Pi 2
  • 2
    Open source server
  • 1
    Linux Client Support
  • 1
    Flexible Integrations
  • 1
    Ldap integration
  • 1
    Slack bridge
  • 1
    Broadcast & Readonly channels
  • 0
    Threading model
  • 1.2K
    Easy to integrate with
  • 877
    Excellent interface on multiple platforms
  • 848
    Free
  • 694
    Mobile friendly
  • 690
    People really enjoy using it
  • 330
    Great integrations
  • 315
    Flexible notification preferences
  • 197
    Unlimited users
  • 184
    Strong search and data archiving
  • 155
    Multi domain switching support
  • 80
    Easy to use
  • 40
    Beautiful
  • 27
    Hubot support
  • 22
    Unread/read control
  • 21
    Slackbot
  • 19
    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 RocketChat
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
  • 1
    Not as well-known as others like it
  • 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

Sign up to add or upvote consMake informed product decisions

- No public GitHub repository available -

What is Mattermost?

Mattermost is modern communication from behind your firewall.

What is 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.

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 RocketChat?
What companies use Slack?

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

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Blog Posts

Sep 29 2020 at 7:36PM

WorkOS

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+2
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+42
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What are some alternatives to Mattermost, RocketChat, and Slack?
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.
Discord
Discord is a modern free voice & text chat app for groups of gamers. Our resilient Erlang backend running on the cloud has built in DDoS protection with automatic server failover.
See all alternatives
Reviews of Mattermost, RocketChat, and Slack
Review of
Slack

Today the impossible happened, our beloved Slack crashed sending chaos into offices around the globe. “Wow, how am I now going to vote for the flavour of our new office candy???”, I thought. But even though it might not have felt like it, everything else around us was still working: the world was still spinning, South Korea was winning over Germany at the World Cup, and today’s quotas and goals had to be met. In these situations, people most often turn towards traditional messaging tools like messenger, WhatsApp or email and hope for the best — that Slack will be back up soon. However, these temporary remedies are not without their complications: undelivered messages that you thought were read, lost documents, mental breakdowns, wasted time, etc.… In general, for us it creates a problematic gap in our office chat history.

But what if I told you that these crashes could potentially never occur again?

Yes, this is real life, and it’s exactly what mesh technology is about so we are going to explain it. In this scenario, if Slack ran with mesh networks, its users would not have been affected by its current technology’s single point of failure, which in this case was the crash of the server.

Lol okay, how is this possible bc this is real life???

Mesh networks might not sound familiar to everyone so let’s compare it with other well-known networking topologies. Consider a Local Area Network (LAN), where devices are connected to a central access point (imagine it like a star with the central access point in the middle and the devices located at the ends). Be it LAN or wifi, the idea is the same, so when I send a message on Slack, it first arrives at the Slack server (the central access point) and from there it is sent to the recipient.

In mesh networks, devices are directly connected to each other. They form a local network using existing connectivity technologies such as Bluetooth or Wi-Fi as “connectors”. Devices can act as “routers” and forward messages and files to others, enabling the content to hop between them until it reaches a destination. This eliminates the need for a central entity.

Let’s apply this concept to today’s crisis. If slack ran on top of mesh networks, their consumers would still be able to communicate and send files even though they were not connected to the crashed server. Once it was up and running again, all their group conversations which would have taken place during the outrage would be uploaded back to Slack’s server once they were back online.

Honestly, it’s that simple. To Slack, it would not only be convenient for its customers in situations like these (because we would never have Slack crashes), it would also considerably reduce their own infrastructure costs and prevent them from having moments that they might find embarrassing.

So slack, if you see that mesh networks could potentially help you, come talk to us.

HypeLabs https://hypelabs.io

Senior Software Engineer
Review of
Slack

Slack is gorgeous and runs on multiple platforms - that's benefit #1. You can easily talk on your iMac then switch to your Android device on the fly.

The one thing I don't really like about it is how it handles multiple organization accounts.

I am a software consultant so I typically work with multiple teams over the months and it's odd to 'log into the right account'. It's not intuitive at all.

I would like there to be a way for users to easily pick a 'Persona' and not accidentally post to the wrong company.

Review of
Slack

Slack filled a very complicated role and did it elegantly.

Its very well designed and easy to use. Adding integrations can be complicated but their documentation with images makes it very easy.

Also I contacted support and get a relevant answer quickly!

All this on the free plan, you better bet we will be upgrading soon.

Product Manager at StackShare
Review of
Slack

Internal Communications made easy

How developers use Mattermost, RocketChat, and Slack
StackShare uses
Slack

I first heard about Slack from my friend Matt (shout out to Final!). He was helping me out with some Rails issues so we started using Slack and I liked it. Specifically, the chat interaction. But also all the integrations. I wasn’t thinking of it as a tool to end all tools at first, just a chat tool with some cool integrations. Then I created a Slack account for StackShare, and that’s when things got real.

Sentry got easier to stay on top of, Heroku was easier to see activity from, discussions were more fluid, and the mobile app was killer. Most of the tools I use either don’t have a mobile app or have shitty ones. Slack is like a replacement for all the mobile apps my tools should have.

I don’t find Slack particularly useful for focused discussions, so I doubt it will replace email anytime soon for us. Things like product discussions/debates are best via email. It forces you to think before you type and have a clear back and forth with someone.

Small gripe: I wish Slack would disable email notifications by default, I still haven’t figured out how to turn those off.

FAELIX uses
Mattermost

It is no secret that we use Mattermost at Faelix — after all, it is a product we already support to be able to offer it to our customers. And like many network operators we use Oxidized to track and log changes to our routers and switches, even when those changes are made by automation tools.

As part of our move to using more ChatOps within the business I wanted to get visibility of network changes within our network operations channel in Mattermost. A quick and dirty script achieved this.

shridhardalavi uses
Slack

Slack is an instant messaging and collaboration system It unifies your entire team communications, making your workflow, well, flow a lot better. It is a cloud-based set of proprietary team collaboration tools and services. Slack teams allow communities, groups, or teams to join through a specific URL or invitation sent by a team admin or owner.

SaberEsPoder uses
Slack

Slack is our go-to communication tool and it's slowly replacing emails across all departments of the company. We built our own Slack Bot to help us with simple DevOps stuff; Honeybadger notifies us in real time of errors happening on production in our monitoring channel; CircleCI reports builds status and deployment info as well.

Andrew Gatenby uses
Slack

Team comms is essential. The R&D team is distributed over two offices, as well as the chance that people are working from home. Slack provides lots of options of keeping individuals and groups up to date. We also use it to integrate into services such as Github and Sentry.

Refractal uses
Slack

Slack is a lifesaver, not only for our day to day team communications and it's direct links into our other tools, but for Beta testing as well, with our custom Slack bot in our beta group being an invaluable asset to avoid giving our testers direct JIRA access.

Sodep uses
RocketChat

Perfect solution for rich content group chat plus self hosted secure IM solution.

Shiqiang Yu uses
RocketChat

Inform when CI/CD and live demo is up