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Compare Mattermost and Slack 
Featured Products
At a Glance
Market Segments
Mid-Market (37.7% of reviews)
Small-Business (41.2% of reviews)
Entry-Level Pricing
$0.00
$0.00
Mattermost
Star Rating
(358)4.3 out of 5
Market Segments
Mid-Market (37.7% of reviews)
Pros & Cons
Entry-Level Pricing
$0.00
Browse all 3 pricing plansSlack
Star Rating
(37,949)4.5 out of 5
Market Segments
Small-Business (41.2% 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 overall user satisfaction, boasting a significantly higher G2 Score compared to Mattermost. Users appreciate its seamless workflow and effective communication features, with one reviewer noting, "This is a great platform for connecting with my team, and the workflow was seamless."
- Users say that Slack's ease of use is a standout feature, with many highlighting the intuitive interface and quick setup process. One user mentioned, "The initial setup was super easy," which contributes to a smoother onboarding experience compared to Mattermost.
- Reviewers mention that Slack's extensive integrations enhance its functionality, making it a preferred choice for teams looking to optimize their workflows. Users have noted, "I really appreciate the many integrations it offers," which allows for better collaboration across various tools.
- According to verified reviews, Mattermost is praised for its security and organization, particularly among teams that require self-hosted solutions. One user stated, "I use Mattermost as a secure team collaboration and messaging platform," highlighting its appeal for organizations with strict data privacy needs.
- G2 reviewers indicate that while Mattermost offers a solid user interface and features, it may not match the same level of satisfaction as Slack in terms of overall usability. Users have noted that while it is "easy" and has a "nice UI," it still faces challenges in comparison to Slack's more polished experience.
- Users report that both platforms have their strengths, but Slack's higher volume of recent reviews suggests a more active user base and ongoing improvements. With 1263 recent reviews for Slack versus just 10 for Mattermost, it appears that Slack is more frequently updated and refined based on user 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
296
9.2
31,007
Ease of Use
8.8
301
9.2
31,930
Ease of Setup
8.1
91
9.2
8,324
Ease of Admin
8.3
69
8.9
5,000
Quality of Support
8.2
227
8.8
21,559
Has the product been a good partner in doing business?
9.0
58
9.0
4,479
Product Direction (% positive)
8.4
290
8.7
30,324
Features by Category
Business Instant Messaging
8.7
193
9.1
13882
8.7
200
9.0
14425
8.0
188
8.6
13740
Business Instant Messaging
7.8
118
8.5
10200
7.9
111
8.1
9532
Business Instant Messaging
8.1
175
9.1
13627
9.0
188
9.2
13260
8.3
162
9.0
11781
Generative AI - Business Instant Messaging
4.9
15
7.5
1491
AI - Business Instant Messaging
5.3
15
7.5
1477
6.1
14
7.9
1483
4.6
14
7.4
1461
5.7
14
7.4
1463
Agentic AI - Business Instant Messaging
5.9
11
7.7
886
5.3
11
7.7
877
Setup
8.5
20
9.1
681
8.8
20
8.9
672
7.9
20
8.7
657
8.7
21
8.9
687
Management
8.7
19
9.0
665
8.0
19
8.7
650
8.1
20
8.9
664
Generative AI
6.9
12
7.7
568
Agentic AI - Workflow Management
Not enough data
7.7
285
Not enough data
8.0
282
Not enough data
8.1
289
Not enough data
7.9
286
Not enough data
8.0
286
Not enough data
7.9
286
Not enough data
8.1
286
Account Options
Not enough data
9.2
280
Not enough data
8.4
277
Not enough data
8.6
271
Not enough data
8.7
274
Not enough data
8.9
279
Not enough data
8.9
277
Q&A Tools
Not enough data
9.0
280
Not enough data
9.1
277
Not enough data
9.1
281
Not enough data
8.7
269
Not enough data
9.0
276
Not enough data
8.9
273
Not enough data
8.6
267
Not enough data
8.8
269
Not enough data
8.5
267
Knowledge Pages
Not enough data
8.5
336
Not enough data
8.3
338
Not enough data
8.1
328
Not enough data
8.1
326
Not enough data
7.9
321
Not enough data
8.4
324
Knowledge Dissemination
Not enough data
8.2
317
Not enough data
8.7
323
Not enough data
9.0
324
Not enough data
8.9
325
Not enough data
8.3
321
Not enough data
8.2
313
Not enough data
8.7
327
Not enough data
8.6
315
Not enough data
8.6
311
Agentic AI - Knowledge Base
Not enough data
7.9
193
Not enough data
7.9
195
Not enough data
7.8
193
Login Options
Not enough data
9.0
756
Not enough data
8.5
736
Productivity
Not enough data
8.0
720
Not enough data
8.3
725
Not enough data
8.6
730
Not enough data
7.8
705
Not enough data
7.9
702
Customization
8.9
19
8.6
723
Not enough data
9.0
736
Not enough data
8.7
711
Agentic AI - Unified Workspaces
Not enough data
7.5
403
Not enough data
7.6
400
Compatibility
Not enough data
9.0
90
Not enough data
9.1
93
Not enough data
8.9
88
Agentic AI - Enterprise Search Software
Not enough data
8.6
59
Not enough data
8.4
55
Not enough data
8.9
57
Not enough data
8.6
57
Not enough data
8.7
57
Not enough data
8.7
55
Search Queries
Not enough data
8.8
89
Not enough data
9.1
88
Not enough data
8.8
87
Not enough data
9.0
89
Not enough data
9.0
86
AI powered search - Enterprise Search Software
Not enough data
9.0
21
Not enough data
9.1
22
Not enough data
8.9
21
Functionality
Not enough data
8.9
88
Not enough data
9.0
87
Not enough data
9.1
91
Compatibility - Enterprise Search Software
Not enough data
9.3
25
Not enough data
9.3
23
Not enough data
9.1
23
Functionality - Enterprise Search Software
Not enough data
9.2
24
Not enough data
9.4
23
Not enough data
9.5
25
Search Queries - Enterprise Search Software
Not enough data
9.3
23
Not enough data
9.2
21
Not enough data
9.1
24
Not enough data
9.4
24
Automation
Not enough data
8.8
1206
Not enough data
8.8
1167
Not enough data
8.5
1143
Administration
Not enough data
8.8
1164
Not enough data
8.6
1128
Not enough data
9.4
1200
Project management
Not enough data
8.7
1149
Not enough data
8.5
1117
Not enough data
8.6
1133
Not enough data
8.5
1122
Not enough data
8.6
1119
Not enough data
8.3
1091
Not enough data
8.3
1115
Workload
Not enough data
8.4
1081
Not enough data
8.8
1124
Not enough data
8.6
1084
Not enough data
8.5
1076
Communication & Collaboration
Not enough data
9.3
1322
Not enough data
9.0
1168
Not enough data
9.3
1233
Cost Management
Not enough data
8.0
1065
Not enough data
8.2
1065
Not enough data
8.1
1058
Integration
Not enough data
8.6
1089
Not enough data
8.4
1063
Not enough data
8.4
1056
Generative AI
Not enough data
7.5
1012
Not enough data
7.7
1006
Agentic AI - Work Management
Not enough data
7.7
516
Not enough data
7.8
510
Not enough data
8.1
510
Not enough data
7.8
510
Communication
Not enough data
9.4
1154
Not enough data
9.3
1156
Not enough data
8.8
1048
Not enough data
8.9
1034
Not enough data
9.1
1036
Content & Documents
Not enough data
9.1
1086
Not enough data
8.9
1032
Not enough data
8.7
1051
Not enough data
8.1
999
Controls
Not enough data
8.3
985
Not enough data
8.1
980
Not enough data
8.7
989
Not enough data
8.4
991
Not enough data
8.2
967
Project Management
Not enough data
8.4
988
Not enough data
8.3
971
Not enough data
8.5
986
Not enough data
8.6
977
Remote Collaboration
Not enough data
9.0
994
Not enough data
8.7
966
Not enough data
8.9
984
Not enough data
7.8
956
Generative AI
Not enough data
7.3
920
Not enough data
7.4
915
Agentic AI - Project Collaboration
Not enough data
7.5
434
Not enough data
7.6
436
Agentic AI - Audio Conferencing
Not enough data
7.5
280
Not enough data
7.6
280
Action Item Detection - AI Note-taking Software
Not enough data
9.3
18
Not enough data
9.4
18
Automatic Transcription - AI Note-taking Software
Not enough data
9.6
19
Collaboration & Sharing - AI Note-taking Software
Not enough data
9.5
18
Language & Accent Support - AI Note-taking Software
Not enough data
9.5
19
Multi-Platform Integration - AI Note-taking Software
Not enough data
9.3
19
Privacy & Security Controls - AI Note-taking Software
Not enough data
9.3
20
Searchable Note Archives - AI Note-taking Software
Not enough data
9.1
17
Speaker Identification - AI Note-taking Software
Not enough data
9.4
19
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
723
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
20.2%
Computer Software
14.3%
Financial Services
4.7%
Computer & Network Security
4.1%
Internet
3.8%
Other
52.9%
Computer Software
15.3%
Information Technology and Services
13.1%
Marketing and Advertising
8.7%
Internet
4.7%
Education Management
3.3%
Other
54.9%
Discussions
What is Mattermost used for?
3 Comments
BB
Mattermost mostly used as professional communication platform like slack. But it is open-source.Read more
when are you going to improve its UI?
2 Comments
CG
They won’t, I had the same problem and nothingRead more
Is Mattermost secure?
2 Comments
BB
yes, absolutely. It is open source and trusted by millions of users and thousand of brands.Read more
How do I delete a channel in slack?
47 Comments
CH
Since this has already been answered, my $0.02 is that you should always archive channels rather than delete them for posterity and/or auditing purposes.Read more
What does slack software do?
28 Comments
RR
Slack is messaging and communication platform which allow an individual for video and audio calls and many more.Read more
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