Compare Mattermost and Slack 
Featured Products
At a Glance
Market Segments
Mid-Market (37.3% of reviews)
Small-Business (41.0% of reviews)
Entry-Level Pricing
$0.00
$0.00
Mattermost
Star Rating
(368)4.3 out of 5
Market Segments
Mid-Market (37.3% of reviews)
Pros & Cons
Entry-Level Pricing
$0.00
Browse all 3 pricing plansSlack
Star Rating
(38,823)4.5 out of 5
Market Segments
Small-Business (41.0% of reviews)
Pros & Cons
Entry-Level Pricing
$0.00
Browse all 4 pricing plansSummary
AI Generated Summary
AI-generated. Powered by real user reviews.
- G2 reviewers report that Slack excels in user experience, with many praising its intuitive interface and seamless integrations with popular tools like Google and Microsoft apps. Users appreciate features like secure channels for private team communication and the ability to react to messages, enhancing collaboration.
- According to verified reviews, Mattermost stands out for its self-hosting capabilities, which is a significant advantage for organizations prioritizing data privacy. Users highlight the familiarity of its interface for those transitioning from Slack, making it easier to adapt while still offering robust features like easy direct messaging and quick file sharing.
- Reviewers mention that Slack's implementation process is notably quick and user-friendly, with many users expressing satisfaction with the onboarding experience. This ease of setup allows teams to start collaborating effectively without extensive training or configuration.
- Users say that while Mattermost is well-organized and easy to navigate, it sometimes lacks the extensive integrations that Slack offers. This can be a drawback for teams that rely on a variety of third-party applications to streamline their workflows.
- G2 reviewers highlight that Slack's support quality is generally rated higher, with users appreciating the responsiveness and helpfulness of the support team. In contrast, Mattermost users have noted that while support is adequate, it may not always meet the same level of responsiveness as Slack.
- According to recent feedback, Slack's overall satisfaction ratings are significantly higher, reflecting a broader user base and more consistent positive experiences. Mattermost, while appreciated for its unique features, has a smaller number of reviews, which may indicate less widespread adoption and feedback.
Pricing
Entry-Level Pricing
Mattermost
Starter
$0.00
Increased productivity for small teams
- Unlimited 1:1 and group messaging
- Unlimited users, channels, teams
- Unlimited boards
Slack
Free
$0.00
For teams wanting to try out Slack for an unlimited period of time
- Searchable message archives, up to 10k of your team’s most recent messages
- 10 apps or service integrations
- Native apps for iOS, Android, Mac & Windows Desktop
Free Trial
Mattermost
Free Trial is available
Slack
Free Trial is available
Ratings
Meets Requirements
8.7
300
9.2
31,509
Ease of Use
8.8
306
9.2
32,384
Ease of Setup
8.1
96
9.2
8,712
Ease of Admin
8.3
69
8.9
5,331
Quality of Support
8.2
231
8.8
21,917
Has the product been a good partner in doing business?
9.0
58
9.1
4,811
Product Direction (% positive)
8.4
295
8.7
30,746
Features by Category
Business Instant Messaging
8.7
195
9.1
13950
8.6
202
9.0
14489
8.0
191
8.6
13783
Business Instant Messaging
7.8
118
8.5
10233
7.9
110
8.1
9570
Business Instant Messaging
8.0
177
9.1
13669
8.9
188
9.2
13278
8.3
166
9.0
11831
Generative AI - Business Instant Messaging
4.6
14
7.5
1485
AI - Business Instant Messaging
5.1
14
7.5
1469
6.0
14
7.9
1475
4.4
13
7.4
1450
5.5
13
7.4
1452
Agentic AI - Business Instant Messaging
5.5
10
7.7
878
5.0
10
7.7
863
Setup
8.5
20
9.1
676
8.8
20
8.9
671
7.9
20
8.7
647
8.7
21
8.9
684
Management
8.7
19
9.0
659
8.0
19
8.7
639
8.1
20
8.9
658
Generative AI
6.9
12
7.7
558
Agentic AI - Workflow Management
Not enough data
7.7
278
Not enough data
7.9
274
Not enough data
8.1
283
Not enough data
7.9
280
Not enough data
7.9
279
Not enough data
7.9
280
Not enough data
8.0
281
Account Options
Not enough data
9.2
284
Not enough data
8.4
279
Not enough data
8.6
270
Not enough data
8.7
276
Not enough data
8.9
283
Not enough data
8.9
280
Q&A Tools
Not enough data
9.1
284
Not enough data
9.1
279
Not enough data
9.1
286
Not enough data
8.7
271
Not enough data
9.1
280
Not enough data
8.9
274
Not enough data
8.6
267
Not enough data
8.9
270
Not enough data
8.5
266
Knowledge Pages
Not enough data
8.5
342
Not enough data
8.3
342
Not enough data
8.1
332
Not enough data
8.1
329
Not enough data
7.9
324
Not enough data
8.4
329
Knowledge Dissemination
Not enough data
8.2
320
Not enough data
8.7
327
Not enough data
9.0
333
Not enough data
8.9
333
Not enough data
8.4
329
Not enough data
8.2
318
Not enough data
8.7
332
Not enough data
8.6
321
Not enough data
8.6
314
Agentic AI - Knowledge Base
Not enough data
7.9
197
Not enough data
7.9
198
Not enough data
7.8
197
Login Options
Not enough data
9.1
773
Not enough data
8.5
737
Productivity
Not enough data
8.0
726
Not enough data
8.3
730
Not enough data
8.6
738
Not enough data
7.9
710
Not enough data
7.9
706
Customization
8.9
19
8.6
735
Not enough data
9.0
751
Not enough data
8.7
717
Agentic AI - Unified Workspaces
Not enough data
7.5
404
Not enough data
7.6
401
Compatibility
Not enough data
9.0
93
Not enough data
9.0
95
Not enough data
8.9
87
Agentic AI - Enterprise Search Software
Not enough data
8.5
56
Not enough data
8.4
53
Not enough data
8.9
54
Not enough data
8.5
54
Not enough data
8.6
54
Not enough data
8.7
53
Search Queries
Not enough data
8.8
91
Not enough data
9.1
91
Not enough data
8.7
87
Not enough data
9.1
89
Not enough data
8.9
87
AI powered search - Enterprise Search Software
Not enough data
9.0
21
Not enough data
9.1
21
Not enough data
9.0
21
Functionality
Not enough data
8.9
86
Not enough data
8.9
87
Not enough data
9.1
93
Compatibility - Enterprise Search Software
Not enough data
9.3
23
Not enough data
9.2
21
Not enough data
9.2
22
Functionality - Enterprise Search Software
Not enough data
9.2
23
Not enough data
9.0
21
Not enough data
9.4
24
Search Queries - Enterprise Search Software
Not enough data
9.4
21
Not enough data
9.1
20
Not enough data
9.0
22
Not enough data
9.3
22
Automation
Not enough data
8.8
1236
Not enough data
8.8
1194
Not enough data
8.5
1169
Administration
Not enough data
8.8
1187
Not enough data
8.6
1130
Not enough data
9.4
1329
Project management
Not enough data
8.7
1163
Not enough data
8.5
1114
Not enough data
8.6
1136
Not enough data
8.5
1126
Not enough data
8.6
1131
Not enough data
8.3
1093
Not enough data
8.3
1119
Workload
Not enough data
8.4
1077
Not enough data
8.8
1164
Not enough data
8.6
1090
Not enough data
8.5
1086
Communication & Collaboration
Not enough data
9.4
1706
Not enough data
9.0
1301
Not enough data
9.4
1454
Cost Management
Not enough data
8.0
1069
Not enough data
8.2
1069
Not enough data
8.1
1063
Integration
Not enough data
8.7
1241
Not enough data
8.4
1080
Not enough data
8.4
1085
Generative AI
Not enough data
7.5
1021
Not enough data
7.7
1033
Agentic AI - Work Management
Not enough data
7.7
515
Not enough data
7.8
510
Not enough data
8.2
536
Not enough data
7.8
513
Communication
Not enough data
9.4
1182
Not enough data
9.4
1144
Not enough data
8.9
1055
Not enough data
8.9
1038
Not enough data
9.1
1051
Content & Documents
Not enough data
9.2
1104
Not enough data
8.9
1041
Not enough data
8.7
1065
Not enough data
8.1
1004
Controls
Not enough data
8.3
989
Not enough data
8.1
984
Not enough data
8.7
998
Not enough data
8.4
1002
Not enough data
8.2
973
Project Management
Not enough data
8.4
1001
Not enough data
8.3
976
Not enough data
8.5
985
Not enough data
8.7
993
Remote Collaboration
Not enough data
9.0
995
Not enough data
8.7
970
Not enough data
9.0
988
Not enough data
7.8
955
Generative AI
Not enough data
7.3
926
Not enough data
7.4
928
Agentic AI - Project Collaboration
Not enough data
7.5
436
Not enough data
7.7
440
Agentic AI - Audio Conferencing
Not enough data
7.5
278
Not enough data
7.7
279
Action Item Detection - AI Note-taking Software
Not enough data
8.9
12
Not enough data
9.2
12
Automatic Transcription - AI Note-taking Software
Not enough data
9.5
13
Collaboration & Sharing - AI Note-taking Software
Not enough data
9.3
12
Language & Accent Support - AI Note-taking Software
Not enough data
9.2
13
Multi-Platform Integration - AI Note-taking Software
Not enough data
9.0
13
Privacy & Security Controls - AI Note-taking Software
Not enough data
8.9
14
Searchable Note Archives - AI Note-taking Software
Not enough data
8.8
12
Speaker Identification - AI Note-taking Software
Not enough data
9.1
13
Communication
8.5
20
Not enough data
8.8
20
Not enough data
8.7
19
Not enough data
Planning
9.6
19
Not enough data
9.6
19
Not enough data
8.6
19
Not enough data
8.9
19
8.6
735
8.6
19
Not enough data
Workflow Management
8.9
19
Not enough data
9.0
19
Not enough data
9.0
18
Not enough data
8.4
18
Not enough data
Knowledge Base
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Security
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Content
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Communication
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Categories
Categories
Shared Categories
Mattermost and Slack are categorized as Workflow Management and Business Instant Messaging
Unique Categories
Mattermost is categorized as Product Management
Slack is categorized as Knowledge Base, Unified Workspaces, Work Management, Enterprise Search Software, Q&A Platforms, AI Note-Taking Software, Project Collaboration, and Audio Conferencing
Reviews
Reviewers' Company Size
Mattermost
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
Slack
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
Small-Business
(50 or fewer emp.)
Mid-Market
(51-1000 emp.)
Enterprise
(> 1000 emp.)
Reviewers' Industry
Information Technology and Services
21.0%
Computer Software
14.1%
Financial Services
4.6%
Internet
3.7%
Automotive
3.7%
Other
52.7%
Computer Software
15.4%
Information Technology and Services
13.1%
Marketing and Advertising
8.5%
Internet
4.6%
Financial Services
3.4%
Other
55.0%
Discussions
What is Mattermost used for?
3 Comments
HF
Mattermost is used primarily as a chat platform.Read more
What is Mattermost used for?
2 Comments
BB
For business & professional communications mostly. You can say opensource slack.Read more
Is Slack a Mattermost?
2 Comments
BB
Slack is not “Mattermost”. But Mattermost in same category, and best open-source alternative to slack with more features.Read more
How do I delete a channel in slack?
47 Comments
OP
Currently, Slack has disabled deleting a channel, you can only archive it if you created it.Read more
What does slack software do?
28 Comments
GM
Slack is a messaging software perfect for companies, it allows you to create channels (groups), it let's you answer to messages in threads and react to...Read more
What is Slack used for?
22 Comments
RR
It connect us with the people no matter where we are through messaging and calls.Read more
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