Compare Mattermost and Slack 
Featured Products
At a Glance
Market Segments
Mid-Market (37.9% of reviews)
Small-Business (41.2% of reviews)
Entry-Level Pricing
$0.00
$0.00
Mattermost
Star Rating
(365)4.3 out of 5
Market Segments
Mid-Market (37.9% of reviews)
Pros & Cons
Entry-Level Pricing
$0.00
Browse all 3 pricing plansSlack
Star Rating
(38,452)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 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
301
9.2
31,304
Ease of Use
8.8
307
9.2
32,253
Ease of Setup
8.1
97
9.2
8,606
Ease of Admin
8.3
69
8.9
5,124
Quality of Support
8.2
232
8.8
21,786
Has the product been a good partner in doing business?
9.0
58
9.1
4,605
Product Direction (% positive)
8.4
296
8.7
30,599
Features by Category
Business Instant Messaging
8.7
196
9.1
13957
8.6
203
9.0
14510
8.0
192
8.6
13796
Business Instant Messaging
7.8
119
8.5
10245
7.9
111
8.1
9568
Business Instant Messaging
8.0
178
9.1
13678
8.9
189
9.2
13293
8.3
166
9.0
11841
Generative AI - Business Instant Messaging
4.9
15
7.6
1509
AI - Business Instant Messaging
5.3
15
7.5
1493
6.2
15
7.9
1497
4.6
14
7.4
1475
5.7
14
7.4
1476
Agentic AI - Business Instant Messaging
5.9
11
7.7
904
5.3
11
7.7
890
Setup
8.5
20
9.1
689
8.8
20
8.9
679
7.9
20
8.7
661
8.7
21
8.9
698
Management
8.7
19
9.0
673
8.0
19
8.7
654
8.1
20
8.9
668
Generative AI
6.9
12
7.8
573
Agentic AI - Workflow Management
Not enough data
7.8
292
Not enough data
8.0
288
Not enough data
8.2
297
Not enough data
8.0
294
Not enough data
8.0
293
Not enough data
8.0
294
Not enough data
8.1
294
Account Options
Not enough data
9.2
289
Not enough data
8.4
282
Not enough data
8.7
278
Not enough data
8.7
282
Not enough data
8.9
289
Not enough data
8.9
286
Q&A Tools
Not enough data
9.1
289
Not enough data
9.1
285
Not enough data
9.1
292
Not enough data
8.7
278
Not enough data
9.1
286
Not enough data
8.9
282
Not enough data
8.6
275
Not enough data
8.9
278
Not enough data
8.5
274
Knowledge Pages
Not enough data
8.5
350
Not enough data
8.3
349
Not enough data
8.2
341
Not enough data
8.1
336
Not enough data
8.0
332
Not enough data
8.4
336
Knowledge Dissemination
Not enough data
8.2
326
Not enough data
8.8
335
Not enough data
9.0
340
Not enough data
9.0
337
Not enough data
8.4
336
Not enough data
8.3
325
Not enough data
8.7
340
Not enough data
8.7
327
Not enough data
8.6
322
Agentic AI - Knowledge Base
Not enough data
8.0
205
Not enough data
8.0
207
Not enough data
7.9
205
Login Options
Not enough data
9.1
775
Not enough data
8.5
748
Productivity
Not enough data
8.0
738
Not enough data
8.3
742
Not enough data
8.6
746
Not enough data
7.9
720
Not enough data
7.9
717
Customization
8.9
19
8.6
742
Not enough data
9.0
758
Not enough data
8.7
727
Agentic AI - Unified Workspaces
Not enough data
7.5
419
Not enough data
7.6
415
Compatibility
Not enough data
9.1
100
Not enough data
9.1
102
Not enough data
9.0
95
Agentic AI - Enterprise Search Software
Not enough data
8.7
65
Not enough data
8.6
61
Not enough data
9.0
63
Not enough data
8.8
63
Not enough data
8.8
63
Not enough data
8.9
62
Search Queries
Not enough data
8.9
98
Not enough data
9.2
96
Not enough data
8.8
94
Not enough data
9.1
96
Not enough data
9.0
95
AI powered search - Enterprise Search Software
Not enough data
9.3
28
Not enough data
9.3
29
Not enough data
9.2
28
Functionality
Not enough data
9.0
95
Not enough data
9.0
94
Not enough data
9.2
100
Compatibility - Enterprise Search Software
Not enough data
9.5
32
Not enough data
9.4
30
Not enough data
9.3
30
Functionality - Enterprise Search Software
Not enough data
9.4
32
Not enough data
9.4
30
Not enough data
9.6
33
Search Queries - Enterprise Search Software
Not enough data
9.5
30
Not enough data
9.4
28
Not enough data
9.3
31
Not enough data
9.5
31
Automation
Not enough data
8.8
1237
Not enough data
8.8
1193
Not enough data
8.5
1164
Administration
Not enough data
8.8
1192
Not enough data
8.7
1141
Not enough data
9.4
1273
Project management
Not enough data
8.7
1171
Not enough data
8.5
1126
Not enough data
8.6
1150
Not enough data
8.5
1137
Not enough data
8.6
1137
Not enough data
8.3
1102
Not enough data
8.3
1131
Workload
Not enough data
8.4
1088
Not enough data
8.8
1153
Not enough data
8.6
1100
Not enough data
8.5
1094
Communication & Collaboration
Not enough data
9.4
1559
Not enough data
9.0
1256
Not enough data
9.4
1358
Cost Management
Not enough data
8.1
1078
Not enough data
8.2
1079
Not enough data
8.1
1072
Integration
Not enough data
8.7
1164
Not enough data
8.4
1083
Not enough data
8.4
1081
Generative AI
Not enough data
7.6
1028
Not enough data
7.7
1030
Agentic AI - Work Management
Not enough data
7.7
527
Not enough data
7.8
521
Not enough data
8.2
536
Not enough data
7.9
524
Communication
Not enough data
9.4
1207
Not enough data
9.3
1196
Not enough data
8.9
1069
Not enough data
8.9
1053
Not enough data
9.1
1062
Content & Documents
Not enough data
9.2
1117
Not enough data
8.9
1054
Not enough data
8.7
1077
Not enough data
8.1
1016
Controls
Not enough data
8.3
1001
Not enough data
8.1
993
Not enough data
8.7
1008
Not enough data
8.4
1014
Not enough data
8.2
981
Project Management
Not enough data
8.4
1008
Not enough data
8.4
988
Not enough data
8.5
1006
Not enough data
8.7
1002
Remote Collaboration
Not enough data
9.0
1013
Not enough data
8.7
980
Not enough data
9.0
1001
Not enough data
7.9
969
Generative AI
Not enough data
7.3
937
Not enough data
7.4
937
Agentic AI - Project Collaboration
Not enough data
7.6
448
Not enough data
7.7
453
Agentic AI - Audio Conferencing
Not enough data
7.6
287
Not enough data
7.7
287
Action Item Detection - AI Note-taking Software
Not enough data
9.4
21
Not enough data
9.5
21
Automatic Transcription - AI Note-taking Software
Not enough data
9.7
22
Collaboration & Sharing - AI Note-taking Software
Not enough data
9.6
21
Language & Accent Support - AI Note-taking Software
Not enough data
9.5
22
Multi-Platform Integration - AI Note-taking Software
Not enough data
9.1
22
Privacy & Security Controls - AI Note-taking Software
Not enough data
9.3
23
Searchable Note Archives - AI Note-taking Software
Not enough data
9.1
20
Speaker Identification - AI Note-taking Software
Not enough data
9.5
22
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
742
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
14.4%
Financial Services
4.6%
Computer & Network Security
4.0%
Internet
3.7%
Other
52.3%
Computer Software
15.3%
Information Technology and Services
13.2%
Marketing and Advertising
8.7%
Internet
4.7%
Financial Services
3.3%
Other
54.8%
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?
21 Comments
RR
It connect us with the people no matter where we are through messaging and calls.Read more
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