Mattermost vs. Slack

Overview
ProductRatingMost Used ByProduct SummaryStarting Price
Mattermost
Score 8.8 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 9.0 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
per month per user
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
Slack got very expensive and limited for the use we expected and also for the economic resources of the company. Mattermost allows custom modifications, and its interface is very similar to Slack, so we didn't need much time to adapt to it. We've been using Mattermost for 3 …
Chose Mattermost
Mattermost is very comparable to Slack. While Slack is more well-known and has a larger budget for advertising, Mattermost can hold its own. Slack probably has some additional integrations, but for what we were looking for (a quality communication tool) Mattermost was a great …
Chose Mattermost
Slack is excellent and has many of the same features as Mattermost. However, the cost if you have a larger group can be prohibitive. Mattermost is a better ROI per user, in our opinion. It also allows us to host it ourselves, which is more desirable for management by our MIS …
Chose Mattermost
As compare to Slack with this tool, Mattermost has introduced more convenience and features for collaboration. All updates come with new and advanced features and functions which always fascinate me and become the reason for using this efficient tool.
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
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
Mattermost is very similar to Slack and has the advantage (in our case) of being entirely on-premises, and entirely free. The feature set is similar, and it has filled the original need that Slack was suggested as a solution for very well. Teams is potentially a better choice …
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
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
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
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
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
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
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
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
Mattermost provides a familiar user interface, fast performance, and a complete set of user collaboration tools and features - it stands out by providing a self-managed installation option for better integration with existing IT assets and more control over data storage. We …
Chose Mattermost
key selling points for us was that its open source and can be self hosted.
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, …
Chose Mattermost
Skype is a light version when compared to Mattermost. Skype is easy to login (using username and password). Whereas, Mattermost login or setup or configuration is way different from Skype. We wanted to integrate with Jumpcloud for various reasons, so we have selected Mattermost …
Slack
Chose Slack
Much simpler and more pleasant to use than the alternatives.
Provides integrations, with external services, that work out of the box which is often an Achilles heel of competitive solutions.
Pricing is unfortunately not that great when compared to alternatives that come in a …
Chose Slack
The most convenient way to organize and follow thread (so any conversation) and a very large way to customize the workspace by individual (my workspace is organize in my way, but my colleague can have their own structure and organization). Also being able to add customized …
Chose Slack
Good User interface, feels easy to use
Easy to open a thread and have a discussion with rich text editing
Integrations are good, helps to check the status of many entities from single place
Top Pros

No answers on this topic

Top Cons

No answers on this topic

Features
MattermostSlack
Project Management
Comparison of Project Management features of Product A and Product B
Mattermost
7.9
45 Ratings
3% above category average
Slack
8.1
510 Ratings
5% above category average
Task Management6.933 Ratings8.1337 Ratings
Gantt Charts7.59 Ratings6.961 Ratings
Scheduling7.69 Ratings8.0283 Ratings
Workflow Automation7.126 Ratings8.4312 Ratings
Mobile Access8.742 Ratings9.4491 Ratings
Search9.024 Ratings8.4493 Ratings
Visual planning tools8.511 Ratings7.8206 Ratings
Communication
Comparison of Communication features of Product A and Product B
Mattermost
8.4
48 Ratings
5% above category average
Slack
8.8
519 Ratings
10% above category average
Chat9.548 Ratings9.7519 Ratings
Notifications8.348 Ratings9.1515 Ratings
Discussions9.146 Ratings9.4504 Ratings
Surveys9.429 Ratings8.1327 Ratings
Internal knowledgebase7.332 Ratings7.8324 Ratings
Integrates with GoToMeeting7.78 Ratings8.9110 Ratings
Integrates with Gmail and Google Hangouts8.012 Ratings8.7182 Ratings
Integrates with Outlook7.58 Ratings8.8120 Ratings
File Sharing & Management
Comparison of File Sharing & Management features of Product A and Product B
Mattermost
8.9
28 Ratings
12% above category average
Slack
8.6
491 Ratings
8% above category average
Versioning7.911 Ratings8.2252 Ratings
Video files9.422 Ratings8.7440 Ratings
Audio files9.422 Ratings8.8431 Ratings
Document collaboration8.018 Ratings8.2342 Ratings
Access control9.822 Ratings8.3332 Ratings
Advanced security features8.919 Ratings8.4286 Ratings
Integrates with Google Drive8.212 Ratings9.0211 Ratings
Device sync9.916 Ratings9.1363 Ratings
Best Alternatives
MattermostSlack
Small Businesses
Stackby
Stackby
Score 9.2 out of 10
Stackby
Stackby
Score 9.2 out of 10
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
All AlternativesView all alternativesView all alternatives
User Ratings
MattermostSlack
Likelihood to Recommend
8.3
(50 ratings)
9.3
(520 ratings)
Likelihood to Renew
6.7
(7 ratings)
9.8
(24 ratings)
Usability
6.3
(6 ratings)
9.2
(134 ratings)
Availability
-
(0 ratings)
10.0
(1 ratings)
Performance
-
(0 ratings)
10.0
(1 ratings)
Support Rating
8.0
(9 ratings)
7.8
(67 ratings)
Implementation Rating
8.0
(1 ratings)
8.4
(4 ratings)
Configurability
-
(0 ratings)
10.0
(1 ratings)
Ease of integration
6.7
(35 ratings)
7.0
(1 ratings)
User Testimonials
MattermostSlack
Likelihood to Recommend
Mattermost
I used Mattermost on a full remote company and it perfectly suited our collaboration and communication culture. The company dealt with privileged and personal information of a huge data base of users, so it was a significant advantage for our need to comply with industry regulations.
Read full review
Salesforce
Slack is definitely well suited according to my experience of using it for over 6 years to be the best platform to have short quick huddles and catch up sessions with your team, More especially if your work environment is a WFH set up. you can easily direct message a colleague regarding something that needs quick attention. making calls is easy and you can basically present a presentation to your team quickly and easy by sharing your screen with them easily. its basically the future
Read full review
Pros
Mattermost
  • 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
Salesforce
  • Slack workflows which helps to automate day to day or weekly tasks
  • Slack Huddle which helps to communicate within the app and also the chat is saved in thread
  • Slack To Do Lists which helps to manage small projects
  • Slack Canvas to keep the whole team on the same page
Read full review
Cons
Mattermost
  • Some of the features in paid plans could be free, however, they have much offered in free plan (self-hosted)
  • The Desktop App we use on windows has some bugs, like when Mattermost is down and comes back up, the app needs restart
Read full review
Salesforce
  • Wish I could organize my "save for later" items into folders. It would be nice to store all of the golden nuggets of information I learn. Even better if we could export it out into a word doc to turn into a real article or resource!
  • Use AI to help us find themes around topics and prepare a summary every week/end of day/month so that the entire team can absorb all conversations into one clean space
Read full review
Likelihood to Renew
Mattermost
Mattermost has been an excellent tool for our business, allowing for a very cost-effective means of communicating, collaborating, and sharing project and business documentation and resources. The free community edition allows for simple installation on existing cloud server resources which results in significantly lower recurring costs compared to the competition
Read full review
Salesforce
To be more transparent, I give 10 because Slack serves our collaboration needs. It provide us a good platform for team communication relaying important update within the company, it has even mobile app where you can install in your phone to monitor any updates within that team that needs your immediate attention and intervention.
Read full review
Usability
Mattermost
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
Salesforce
At the basic surface, Slack does deliver everything we need - easy to handle, easy to understand. But, as I said earlier, there are the more complex parts which demand more of us and some of them even lack information about how to be used, which is frustrating. If we could have maybe a section with instructions, or maybe if you make the features easier to use, it would be awesome.
Read full review
Reliability and Availability
Mattermost
No answers on this topic
Salesforce
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.
Read full review
Performance
Mattermost
No answers on this topic
Salesforce
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.
Read full review
Support Rating
Mattermost
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.
Read full review
Salesforce
I've never had to contact support for Slack which is a great testament to its ease and use. Adding people outside of the organization takes a little getting used to, but ultimately allows for greater collaboration between FTE and contractors. There is no clear alternative to this software, so it's the best we can do for now.
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Implementation Rating
Mattermost
This went as expected. No surprises or major hurdles.
Read full review
Salesforce
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.
Read full review
Alternatives Considered
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 every body here. Also, easier user interface
Read full review
Salesforce
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, scheduling even a basic one-on-one meeting can feel laborious.
Read full review
Return on Investment
Mattermost
  • Improved Communication Efficiency by consolidating all the variety of messaging apps etc
  • real-time communication and collaboration has improved the orgs ability to address issues and implement changes rapidly.
  • Accelerated decision-making processes, reducing the time required for team approvals and discussions which used to be in back and forth emails.
Read full review
Salesforce
  • Slack has significantly improved communication within the organization by providing a platform for quick and instant messaging.
  • Teams can easily collaborate on different projects with Slack’s channels.
  • We have to use Google Drive to send large videos. Would have been good if it could be spent through Slack.
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.