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
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
Mattermost offers secure collaboration for my team. I like how flexible the deployment is with either on-premises or secure cloud where our data and information is stored securely and for the control and visibility we need. Real-time and async messaging with integrated voice …
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 …
Chose Mattermost
Cost competitive and you own the data.
Chose Mattermost
Mattermost is self-hosted, easy to configure, allows for multiple projects, unlimited users, mobile app and easy 3rd party integration.
Slack
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
8.3
29 Ratings
5% above category average
Slack
7.9
400 Ratings
0% above category average
Task Management7.318 Ratings7.8252 Ratings
Gantt Charts8.310 Ratings7.061 Ratings
Scheduling8.410 Ratings7.8208 Ratings
Workflow Automation7.413 Ratings7.9227 Ratings
Mobile Access8.528 Ratings9.2387 Ratings
Search9.225 Ratings8.2385 Ratings
Visual planning tools8.912 Ratings7.3150 Ratings
Communication
Comparison of Communication features of Product A and Product B
Mattermost
8.9
31 Ratings
10% above category average
Slack
8.6
410 Ratings
7% above category average
Chat9.931 Ratings9.7410 Ratings
Notifications8.531 Ratings9.0406 Ratings
Discussions9.429 Ratings9.2397 Ratings
Surveys9.118 Ratings8.1249 Ratings
Internal knowledgebase8.617 Ratings7.7249 Ratings
Integrates with GoToMeeting8.79 Ratings8.5111 Ratings
Integrates with Gmail and Google Hangouts8.613 Ratings8.5184 Ratings
Integrates with Outlook8.29 Ratings8.4122 Ratings
File Sharing & Management
Comparison of File Sharing & Management features of Product A and Product B
Mattermost
8.9
29 Ratings
9% above category average
Slack
8.4
384 Ratings
4% above category average
Versioning8.912 Ratings8.0185 Ratings
Video files9.223 Ratings8.5340 Ratings
Audio files9.223 Ratings8.6335 Ratings
Document collaboration8.419 Ratings8.1269 Ratings
Access control9.023 Ratings8.2250 Ratings
Advanced security features8.520 Ratings8.2213 Ratings
Integrates with Google Drive8.613 Ratings8.8213 Ratings
Device sync9.317 Ratings9.2273 Ratings
Best Alternatives
MattermostSlack
Small Businesses
Stackby
Stackby
Score 9.6 out of 10
Stackby
Stackby
Score 9.6 out of 10
Medium-sized Companies
Troop Messenger
Troop Messenger
Score 9.7 out of 10
Troop Messenger
Troop Messenger
Score 9.7 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
9.5
(32 ratings)
9.3
(410 ratings)
Likelihood to Renew
6.8
(6 ratings)
9.4
(20 ratings)
Usability
6.0
(6 ratings)
9.9
(29 ratings)
Support Rating
8.0
(9 ratings)
1.0
(65 ratings)
Implementation Rating
8.0
(1 ratings)
10.0
(2 ratings)
Ease of integration
7.2
(19 ratings)
-
(0 ratings)
User Testimonials
MattermostSlack
Likelihood to Recommend
Mattermost
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
Salesforce
I would definitely recommend Slack to everyone who needs a messaging platform for work. The thing that I most appreciate on Slack is the possibility of talking to my coworkers without using my personal number or personal apps. This way, I can separate what is work and what is not. Slack even has the option to mute notifications after work hours. I'm able to keep track of every project and discuss them in an easy and fast way. Another great thing is that you can keep and check the history of channels and groups, this way the discussions are never lost when someone joins the project in the middle of it or someone leaves, the history is always there. The only thing that bothers me in the platform is the system of threads, where you can easily lose the messages cause they look kind of hidden. If you have multiple subjects with someone and the person only responds in threads, it's very common to lose their messages.
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Pros
Mattermost
  • We collaborate as a team with great efficiency and ease, we solve any problem or need together through the Mattermost chat.
  • Communication is made regardless of the distance where my colleagues are, it is very fast and does not slow down the progress of our work.
  • We can create many channels and be more efficient, we enhance the internal productivity of each department.
Read full review
Salesforce
  • Organize threads of project content - WAY easier than having multiple emails
  • Provide the ability for others to observe communication on projects or topics that they aren't directly involved in
  • Create a space to share universal business announcements
  • Create spaces for topics that are fun
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
  • While threads exist to keep conversations organized, managing and finding threads within channels can be cumbersome. Enhancements in thread management and search capabilities could be beneficial.
  • Slack has a limit on the size of files that can be directly uploaded. Increasing this limit or providing smoother integration with external file-sharing services could be beneficial.
  • Managing guest access can be cumbersome, and simplifying the process for inviting and controlling guest users would be beneficial.
  • Slack primarily operates within individual workspaces, making it challenging to collaborate across different workspaces. Enhancing features for inter-workspace communication could improve collaboration for organizations with multiple Slack instances.
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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
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Salesforce
As useful as Slack has become within our company, I feel fairly confident we will continue to use Slack as a communication tool. They continue to improve their software and add value to its use within our office. Customer service delivers, which is an absolute must. Looking forward to how they improve.
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.
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Salesforce
As long as you use the basic chat features and nothing more, it really is super easy to understand and use. Once you want to take advantage of some of the more advanced features and capabilities, that's when things get complicated. Anyone who has use SMS or a chat program before will be able to figure out the basics though, so rolling this out should be relatively straightforward and not required exhaustive training. Teaching chat etiquette is something else though.
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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.
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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.
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Salesforce
It always helps if you communicate to everyone in the organization how important it is to drop whatever other chat tools they are using and jump quickly to Slack. They will all fall in love with it.
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Alternatives Considered
Mattermost
Before Mattermost, we used Stride first, and then Slack as our communication platform. Stride got discontinued so it is not comparable, but Slack got very costly for us, with basically the same features as Mattermost - a matter of fact, the "reply" feature is surprisingly non-existent on Slack (you can reply by opening a different thread, but that is hard to follow in most cases), and not only exists in Mattermost but very straightforward. We have considered using Discord too, but then chose Mattermost for its open-source nature, and the possibility of running our very own self-hosted servers, with total control.
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Salesforce
Microsoft Teams got very confusing for me with all of the tabs and different things to learn how to use it. I felt that Slack has a much cleaner look and makes it easy for anyone to learn how to use. I also like how it integrates seamlessly into our Google/mac workspace!
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Return on Investment
Mattermost
  • Very high performing data migration functions and easy to navigate.
  • Creating analytics on multiple big data is a very simple and reliable report with multiple benefits.
  • Collaboration is effective, and easy project documentation.
  • Lead generation is excellent and easy on access control management.
Read full review
Salesforce
  • Allowing our team to communicate, especially in a remote-first environment is invaluable
  • Sharing sensitive information securely is a great feature so we don't have to rely on other software
  • Direct communication with our clients through Slack Connect helps us reach a larger audience and therefore increases our opportunity for revenue
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.