Mattermost vs. Slack

Overview
ProductRatingMost Used ByProduct SummaryStarting Price
Mattermost
Score 9.0 out of 10
Enterprise companies (1,001+ employees)
Mattermost from the company of the same name in Palo Alto is a messaging, collaboration and communication platform providing high security and compliance for the businesses that need it.
$0
per month per user
Slack
Score 9.1 out of 10
N/A
Slack is a group messaging or team collaboration app that aims to simplify communication for businesses. Features include open discussions, private groups, and direct messaging, as well as deep contextual search and message archiving, and file sharing. Slack integrates with a number of other tools, such as MailChimp, Dropbox, and Google Drive. Slack was acquired by Salesforce in December 2020. The product is free to use, and also has paid plans with more features and greater controls. The…
$0
Pricing
MattermostSlack
Editions & Modules
Free Self-Hosted
$0
per month per user
Professional
$10
per month per user
Enterprise
Contact Us
per month per user
Free
$0
Pro
$7.25*
per month per user
Business+
$12.50*
per month per user
Enterprise
Contact Sales
Offerings
Pricing Offerings
MattermostSlack
Free Trial
YesYes
Free/Freemium Version
YesYes
Premium Consulting/Integration Services
NoNo
Entry-level Setup FeeOptionalNo setup fee
Additional Details*Per active user, per month, when paying once a year. Pro is $8.75 USD per active user when paying month to month. Business+ is $15.00 USD per active user when paying month to month.
More Pricing Information
Community Pulse
MattermostSlack
Considered Both Products
Mattermost
Chose Mattermost
Honestly iv just used these two but when it comes to customization, they don't come close to Mattermost. Slack and Teams are Less flexible, Not self hosted. Not Open source,etc I will also say that i noticed integration capabilities are very limited with teams and slack and not …
Chose Mattermost
I feel slack is a bit more difficult to use overall than Mattermost. Mattermost makes the tasks of communicating across departments and team members easier, as well as giving the ability to share information via hyper links, attachments, and other forms of communication among …
Chose Mattermost
They're very similar. I think it's really a matter of preference. Again, one of the things I like about Mattermost is that it's strictly for business (atleast for us) it's different from the more mainstream messaging apps used so we can kind of separate work vs personal messages.
Chose Mattermost
Slack, Microsoft Teams and Discord
Chose Mattermost
It's cheaper and similar to Slack.
You can break down your project modules better here.
It's secure and self-hosted.
Chose Mattermost
Much more expensive than most chat applications but you have more control over things by self-hosting. Your security team will be able to design a very secure place to store all your code, passwords, and internal details, but most companies will not require this. It would be …
Chose Mattermost
In comparison to Slack, where Slack is strictly for internal communication, Mattermost actually has the format to display and not alter source code. Google chat is also even more limited in comparison to Slack and Mattermost. If you collaborate on code every single day, then …
Chose Mattermost
It is just as good if not better. Can be a superior option depending on the needs of your organization.
Chose Mattermost
These products all required cloud connectivity and licensing that was a significant cost. Mattermost allowed us to pilot this among just the Ops team and then evangelize this to the other infrastructure team. This allowed us to slowly show the value of this software and expand …
Chose Mattermost
Unlike Slack and Discord, Mattermost is self-hosted and focused on security. I used Discord before for community management and much simpler and less secure operations. Slack is great, but the fact that is cloud based takes out a lot of its independence.
Chose Mattermost
We used to have Mattermost and now we have Microsoft Teams. They are both very similar. Mattermost and Microsoft Teams are both great for communicating internally via calls, chats, meetings, etc. They are also both easy to set up an use. However, the Microsoft Teams mobile app …
Chose Mattermost
to reduce cost we shifted to Mattermost.
Chose Mattermost
Mattermost works better in that there aren’t constant updates and changes which can make finding past messages difficult. Mattermost also works better for channel creation and communication
Chose Mattermost
Slack is by far my personal favorite due to the age of the platform and the maturity of the features. Mattermost is a close 2nd-
Chose Mattermost
Mattermost is much faster and easier to use. It also has many more features beyond chat. They are more customizations and features for workflow and messaging on this platform also. The ability to integrate with other platforms via plugins, the security features, and the open …
Chose Mattermost
Mattermost is easier to use, faster, and less resource-intensive. Cross-platform support is great, and the mobile experience is awesome.
Chose Mattermost
We selected mattermost since we can control storage of our data. Slack is a great tool and offers more robust features compared to mattermost. However, the previously mentioned reason & the competitive pricing allowed us to stick with mattermost.
Chose Mattermost
key selling points for us was that its open source and can be self hosted.
Chose Mattermost
Mattermost is cheaper and offers the possibility of self-hosting compared to other competitors. This is a great advantage for our company.
Chose Mattermost
Microsoft Teams feels quite clunky and the video chat is buggy. Slack is close but maybe not quite as feature-rich. Mattermost just feels like the right tool for a company my size ~1000+ users. No one has had any major issues with this tool and there haven't been any …
Chose Mattermost
First of all, we don't lose messages; we can see or search messages from any point in the past. Second, it offers to manage the whole product ourselves from hosting to serving users of our organisation. We feel that we have full control over data, managing users, …
Slack
Chose Slack
Slack is far superior to Google Chat. There is much better organization and separation of groups/topics using channels and folders. I also believe that Slack is better than Teams. It has many integrations and functionality that make it similar, while also being more of a modern …
Chose Slack
Microsoft Teams, Discord and Google Chat
Chose Slack
Microsoft Teams is slightly more user friendly, due to it being connected to email. It connects to your calendar and is helpful to keep everything together. The notifications are a bit more helpful on Miro because it is live. I enjoy the ease of communication on Teams. It's …
Chose Slack
Slack is far superior to other interoffice communications I have used. It has more features for messaging like the ability to include emojis or react to messages. You can also edit and share messages between conversations. I'm not sure how other platforms have evolved but I …
Chose Slack
not much function as Slack offering. Public & Private Groups creation not available in Hangout
Chose Slack
I evaluated Skype for Business, Microsoft Teams and Google Chat. Slack stood out for its user friendly interface, powerful integrations and fast flexible communication. Microsoft teams felt more formal and complex, while Google chat lacked features. Slack best matched our …
Chose Slack
our team's current non-Microsoft(Google) tech stack, hard-coded into our workflow. It's infinitely more customizable than Teams, easily meeting our requirements. Additionally, Slack has unlimited external users, whereas Teams has limitation, so Slack is the obvious choice for …
Chose Slack
Slack works great with Salesforce and seems the most trendy. MS Teams has some more connectivity with the MS suite which is nice though and a bit more robust as a communication platform when using it for both chat and video. We use a combo of Zoom and Slack for internal …
Chose Slack
I have used Teams, Instagram, and WhatsApp for business, but Slack stands out for how organized and work focused it is. Unlike WhatsApp, which is more casual, or Instagram, which is not built for very professional and secure work chats, Slack keeps everything structured with …
Chose Slack
Trello is a task management tool platform that best complements Slack. Even though you can tag different team members to boards or specific tasks, Slack provides a more robust platform to communicate and share files, ideas, or issues about a task. And can be used as a general …
Chose Slack
I think obviously Slack is much much better than Google chat, in my previous organisation, we used to communicate everything via Google chat or email or Google meet, it was difficult to manage because those application combined had less options and features than Slack.
Chose Slack
I'm not a huge fan of Microsoft in general, I utilize Google and Slack more for my day to day.
Chose Slack

More Intuitive & Simpler Interface – Slack is easier to set up and navigate.
Faster Adoption – No need for complex Microsoft ecosystem integration.
Chose Slack
Slack has just been the best communications tool for our team. Slack integrations are the best, the fact that its multi-device functional and has great features like file sharing at a fast speed, screen sharing, quick and easy to use. I do not think we would ever consider and …
Chose Slack
Slack: It's easy to strike up a chat right away with one-click calls or huddles. By simply pressing the call button, both users are involved without the need to arrange a meeting. Microsoft Teams: With calendar invites, time slot choices, and numerous confirmation processes, …
Chose Slack
The UI is difficult to understand and also to find a particular chat it is difficult to search in Teams. Also Slack has cool features like Slack Workflows and To do lists and Slack Canvas which makes life more easier. Slack apps to integrate existing app and also I use Slack to …
Chose Slack
It is superior to other products in its ability to communicate quickly with other colleagues. I can collaborate and work on multiple projects with colleagues. It is just an amazing product to use at work. I like the ease of using the tool. It’s a much better product than teams …
Chose Slack
I absolutely hate Microsoft teams, I dislike Google chat, I really like Slack. The main reason for that rating boils down to UI and usability. At my company, we have to use teams and chat still when we are interacting with customers or certain other departments within the …
Chose Slack
Slack offers better chat then google chat for mobile devices AWS the Slack chat bot is more informative and efficient to use Azure dev ops and Slack are great to have side by side
Chose Slack
We did not found the same level of features on all these products. Where Slack is better than other ones, is that you are interacting with other really fast, you can jump in open channels, private channels, be updated about topics and also manage different workspaces. The …
Chose Slack
Slack is still one of the best Chat tools on the market, but Zoom Team Chat (Zoom Workplace) is coming up quickly and overall, provides a great tool that is included at no cost.
I believe that Slack still has some development advantages over the competitors at this point still, …
Features
MattermostSlack
Project Management
Comparison of Project Management features of Product A and Product B
Mattermost
8.3
Ratings
7% above category average
Slack
8.2
Ratings
6% above category average
Task Management7.00 Ratings8.20 Ratings
Gantt Charts8.40 Ratings6.90 Ratings
Scheduling8.40 Ratings7.90 Ratings
Workflow Automation7.40 Ratings8.40 Ratings
Mobile Access9.10 Ratings9.40 Ratings
Search8.90 Ratings8.70 Ratings
Visual planning tools9.00 Ratings8.00 Ratings
Communication
Comparison of Communication features of Product A and Product B
Mattermost
8.4
Ratings
6% above category average
Slack
8.8
Ratings
10% above category average
Chat9.20 Ratings9.80 Ratings
Notifications8.40 Ratings9.10 Ratings
Discussions8.80 Ratings9.60 Ratings
Surveys8.90 Ratings8.10 Ratings
Internal knowledgebase6.10 Ratings7.80 Ratings
Integrates with GoToMeeting8.90 Ratings8.90 Ratings
Integrates with Gmail and Google Hangouts8.70 Ratings8.70 Ratings
Integrates with Outlook8.30 Ratings8.90 Ratings
File Sharing & Management
Comparison of File Sharing & Management features of Product A and Product B
Mattermost
9.1
Ratings
14% above category average
Slack
8.7
Ratings
10% above category average
Versioning9.00 Ratings8.40 Ratings
Video files9.30 Ratings8.80 Ratings
Audio files9.30 Ratings9.10 Ratings
Document collaboration7.90 Ratings8.40 Ratings
Access control9.90 Ratings8.40 Ratings
Advanced security features9.00 Ratings8.40 Ratings
Integrates with Google Drive8.60 Ratings9.00 Ratings
Device sync10.00 Ratings9.10 Ratings
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MattermostSlack
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Medium-sized Companies
Troop Messenger
Troop Messenger
Score 9.8 out of 10
Troop Messenger
Troop Messenger
Score 9.8 out of 10
Enterprises
HCL Connections
HCL Connections
Score 9.0 out of 10
HCL Connections
HCL Connections
Score 9.0 out of 10
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User Ratings
MattermostSlack
Likelihood to Recommend
7.8
(0 ratings)
9.4
(0 ratings)
Likelihood to Renew
6.4
(0 ratings)
10.0
(0 ratings)
Usability
6.4
(0 ratings)
9.2
(0 ratings)
Availability
-
(0 ratings)
10.0
(0 ratings)
Performance
-
(0 ratings)
10.0
(0 ratings)
Support Rating
8.0
(0 ratings)
9.9
(0 ratings)
Implementation Rating
8.0
(0 ratings)
10.0
(0 ratings)
Configurability
-
(0 ratings)
10.0
(0 ratings)
Ease of integration
7.0
(0 ratings)
7.0
(0 ratings)
User Testimonials
MattermostSlack
Likelihood to Recommend
Mattermost is definitely appropriate for a growing company with team members spread out across the u.s. and Canada. It’s given me the ability to have access to anyone with the information I need or the ability to develop friendships, working relationships with people I otherwise wouldn’t have access to
Read full review
Slack is really effective for smaller teams to use as an internal communication platform. I think that it's still suitable even for companies of up to 500-1000 employees, but for larger teams it's less appropriate (or would require more aggressive organization, e.g. keeping channels protected and on an invite-only basis). It's really helpful for small team-to-small team communication too (like in our case where we create external channels to support POCs/business partnerships). It's not great for direct collaboration (e.g. it's hard to iterate on a project spec or a document together, directly in Slack) but it's well suited for conversational coordination, like planning meetings or asking informational questions.
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Pros
  • Easy intergration to our main CRM (Monday.com)
  • I'm not techy myself but I have seen a lot of our previous integrations in Slack transferred over to Mattermost so that's fun
  • The desktop and phone app (android) works well enough. I haven't tried it on the Apple ecosystem yet.
Read full review
  • Huddles Run smoothly without any interferences.
  • Smooth individual calls quick and easy without any interruptions.
  • seamless notifications across multiple devices
  • The ability to easily tag a team member to urgently attend to a specific escalation.
  • Slack being user friendly and able to integrate easily with other platforms and apps.
  • How to easily open up different channels for different escalations and needs.
  • a safe direct messaging option.
Read full review
Cons
  • Basic features like custom status, collapsed reply threads are JUST rolling out - kind of slow for a workplace chat app.
  • I don't really get the idea of Playbooks and Boards - there are better, dedicated tools for stuff like this and it's not so easy to turn off.
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  • Undoubtedly Slack’s search function is powerful but sometimes it is difficult to find specific messages or files in very active channels with high message volumes. This needs an improvement.
  • I have experienced notification issues on my phone. I am not receiving notifications and have missed important updates as a result. I tried uninstalling and reinstalling the app, but the problem still persists.
  • The Business Plus plan does not include support for data loss prevention or offline backup providers.
Read full review
Likelihood to Renew
Mattermost works perfectly within our company as a way to communicate seamlessly. I have had no issues with the product and continue to use it often while on and off site. The mobile app allows me to continue to communicate with my team even when I don't have my laptop with me.
Read full review
Slack sitll lacks in functionality. It's better than Skype for Business in many ways, but it is still another chat/message board app. It has limits in free version and paid versions. Also Windows app has errors that bother me, for example, I see number on one of my team's icons. It suggests that one of channels has unread messages; I check all channels - no unread messages, but that "1" still appears
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Usability
It's an extremely easy to use software, and I would recommend it to every company that is growing. I think they could improve their notification system, as it gets a little spammy sometimes and important notifications get lost. Also needs to improve the number of private chats that you are allowed to create.
Read full review
The product is fantastic, it keeps everyone connected and ensures detailed connection.
User interface of Slack software is very is very straightforward no need for training.
Availability of unlimited tutorials and demos.
Slack can be easily tailored to perform specific tasks.
Read full review
Reliability and Availability
No answers on this topic
Yes, the app works 24/7. I don't even recall having any period that we could not use since the implementation. Even the maintenance periods are barely noticeable and our work is not impacted by it when it happens.
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Performance
No answers on this topic
Slack is a soft app, we don't have many issues with it. I recall one or two people complaining about something during our usage period, but I didn't have a bad experience. When the app is slow, usually the problem is with my computer or my internet. The app works just fine.
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Support Rating
We have not had to contact support for Mattermost ever. All that we have needed has been available in the documentation or website. One of our DevOps team members set it up in a couple of hours. The whole team was using Mattermost that same day. No support needed.
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Whenever I've had to troubleshoot an issue with Slack (which, to be honest, has not happened very often), their online documentation has been easy to locate, easy to understand, and effective in resolving my issue. Slack's ever-growing popularity also means that there's a large community of practice out there that can be depended upon.
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Implementation Rating
This went as expected. No surprises or major hurdles.
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I was not part of the implementation team, but I recall being 100% happy and excited to learn and use a new tool. I'm still am to be honest.
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Alternatives Considered
Unlike Slack and Discord, Mattermost is self-hosted and focused on security. I used Discord before for community management and much simpler and less secure operations. Slack is great, but the fact that is cloud based takes out a lot of its independence.
Read full review
I like Slack better than ClickUp, because I would spend 30-60 minutes a day updating my ClickUp tasks. The way ClickUp was used was very micromanaging. I billed by the hour, so I was willing to put in the time to alert the boss what tasks I was working on.
One of my jobs used Hive - I mostly just ran it in the background in case anyone messaged me. I did not use it often.
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Return on Investment
  • The platform is adaptive to storage data center outages in case our cloud storage provider goes away, Mattermost still works with our local database. However, files couldn't be shared. We can switch storage to local temporarily; that's a benefit. Later it all syncs up to main storage.
  • When our team switched to Mattermost from paid solutions, we had much savings and access to unlimited past messages and storage quota (we use our cloud storage provider)
  • We have better visibility of our tools and other products running adjacent to Mattermost due to integration capability. We use it for notifications/ updates sent from other products.
Read full review
  • Slack has been incredibly helpful in connecting various tech apps and ecosystems, creating a more streamlined and responsive process.
  • Slack has made it significantly easier to communicate with our team members across multiple time zones, creating a more engaging environment for our all-remote team.
Read full review
ScreenShots

Mattermost Screenshots

Screenshot of Channels: All team communications in one place.Screenshot of Playbooks: Orchestrates work across tools and teams.Screenshot of Boards: Project planning and milestones.Screenshot of Connections: Unites the entire technology stack through a single point of collaboration.