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
Features
MattermostSlack
Project Management
Comparison of Project Management features of Product A and Product B
Mattermost
8.3
Ratings
8% 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 Ratings9.50 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
11% 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
15% above category average
Slack
8.7
Ratings
11% 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
Best Alternatives
MattermostSlack
Small Businesses
Stackby
Stackby
Score 9.0 out of 10
Stackby
Stackby
Score 9.0 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
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)
10.0
(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
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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.
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  • 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.
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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.
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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.
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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.
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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.
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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.
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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.
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  • 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.
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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.