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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
(37,812)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
30,947
Ease of Use
8.8
301
9.1
31,841
Ease of Setup
8.1
91
9.1
8,240
Ease of Admin
8.3
69
8.9
4,989
Quality of Support
8.2
227
8.8
21,506
Has the product been a good partner in doing business?
9.0
58
9.0
4,468
Product Direction (% positive)
8.4
290
8.7
30,265
Features by Category
Business Instant Messaging
8.7
193
9.1
13862
8.7
200
9.0
14404
8.0
188
8.6
13719
Business Instant Messaging
7.8
118
8.5
10179
7.9
111
8.1
9513
Business Instant Messaging
8.1
175
9.1
13610
9.0
188
9.2
13246
8.3
162
9.0
11753
Generative AI - Business Instant Messaging
4.9
15
7.5
1478
AI - Business Instant Messaging
5.3
15
7.5
1464
6.1
14
7.9
1471
4.6
14
7.4
1448
5.7
14
7.4
1449
Agentic AI - Business Instant Messaging
5.9
11
7.6
873
5.3
11
7.6
864
Setup
8.5
20
9.0
667
8.8
20
8.9
658
7.9
20
8.6
645
8.7
21
8.9
668
Management
8.7
19
9.0
651
8.0
19
8.6
637
8.1
20
8.9
649
Generative AI
6.9
12
7.7
555
Agentic AI - Workflow Management
Not enough data
7.6
273
Not enough data
7.9
269
Not enough data
8.0
276
Not enough data
7.8
274
Not enough data
7.9
273
Not enough data
7.8
273
Not enough data
8.0
273
Account Options
Not enough data
9.2
269
Not enough data
8.3
268
Not enough data
8.6
260
Not enough data
8.6
264
Not enough data
8.9
269
Not enough data
8.8
266
Q&A Tools
Not enough data
9.0
269
Not enough data
9.0
266
Not enough data
9.1
270
Not enough data
8.6
260
Not enough data
9.0
265
Not enough data
8.8
262
Not enough data
8.5
257
Not enough data
8.8
258
Not enough data
8.4
256
Knowledge Pages
Not enough data
8.4
326
Not enough data
8.3
329
Not enough data
8.0
318
Not enough data
8.0
315
Not enough data
7.9
312
Not enough data
8.3
313
Knowledge Dissemination
Not enough data
8.2
307
Not enough data
8.7
312
Not enough data
8.9
314
Not enough data
8.9
315
Not enough data
8.3
311
Not enough data
8.2
304
Not enough data
8.6
317
Not enough data
8.6
305
Not enough data
8.5
302
Agentic AI - Knowledge Base
Not enough data
7.8
185
Not enough data
7.8
187
Not enough data
7.7
184
Login Options
Not enough data
9.0
741
Not enough data
8.5
723
Productivity
Not enough data
8.0
705
Not enough data
8.3
710
Not enough data
8.6
715
Not enough data
7.8
692
Not enough data
7.9
689
Customization
8.9
19
8.5
708
Not enough data
9.0
722
Not enough data
8.6
697
Agentic AI - Unified Workspaces
Not enough data
7.4
389
Not enough data
7.5
387
Compatibility
Not enough data
8.9
81
Not enough data
8.9
84
Not enough data
8.8
79
Agentic AI - Enterprise Search Software
Not enough data
8.3
50
Not enough data
8.2
47
Not enough data
8.8
48
Not enough data
8.4
48
Not enough data
8.4
48
Not enough data
8.5
46
Search Queries
Not enough data
8.6
80
Not enough data
9.1
79
Not enough data
8.6
79
Not enough data
9.0
80
Not enough data
8.9
77
AI powered search - Enterprise Search Software
Not enough data
8.6
14
Not enough data
8.7
14
Not enough data
8.6
14
Functionality
Not enough data
8.8
79
Not enough data
8.9
78
Not enough data
9.0
81
Compatibility - Enterprise Search Software
Not enough data
9.0
16
Not enough data
8.9
14
Not enough data
9.0
15
Functionality - Enterprise Search Software
Not enough data
8.9
15
Not enough data
9.2
14
Not enough data
9.1
15
Search Queries - Enterprise Search Software
Not enough data
9.0
14
Not enough data
8.8
14
Not enough data
8.6
15
Not enough data
9.0
15
Automation
Not enough data
8.8
1184
Not enough data
8.8
1147
Not enough data
8.5
1127
Administration
Not enough data
8.8
1146
Not enough data
8.6
1110
Not enough data
9.4
1176
Project management
Not enough data
8.7
1130
Not enough data
8.5
1100
Not enough data
8.5
1116
Not enough data
8.5
1105
Not enough data
8.5
1100
Not enough data
8.3
1075
Not enough data
8.2
1095
Workload
Not enough data
8.4
1065
Not enough data
8.8
1103
Not enough data
8.6
1066
Not enough data
8.4
1059
Communication & Collaboration
Not enough data
9.3
1251
Not enough data
9.0
1135
Not enough data
9.3
1200
Cost Management
Not enough data
8.0
1048
Not enough data
8.2
1048
Not enough data
8.1
1043
Integration
Not enough data
8.6
1067
Not enough data
8.4
1047
Not enough data
8.4
1039
Generative AI
Not enough data
7.5
994
Not enough data
7.6
991
Agentic AI - Work Management
Not enough data
7.6
498
Not enough data
7.7
494
Not enough data
8.0
495
Not enough data
7.7
495
Communication
Not enough data
9.4
1123
Not enough data
9.3
1114
Not enough data
8.8
1030
Not enough data
8.9
1019
Not enough data
9.1
1022
Content & Documents
Not enough data
9.1
1063
Not enough data
8.9
1021
Not enough data
8.7
1035
Not enough data
8.1
984
Controls
Not enough data
8.3
973
Not enough data
8.1
969
Not enough data
8.6
977
Not enough data
8.4
978
Not enough data
8.2
957
Project Management
Not enough data
8.4
974
Not enough data
8.3
958
Not enough data
8.5
970
Not enough data
8.6
965
Remote Collaboration
Not enough data
9.0
981
Not enough data
8.7
954
Not enough data
8.9
970
Not enough data
7.8
946
Generative AI
Not enough data
7.2
908
Not enough data
7.3
904
Agentic AI - Project Collaboration
Not enough data
7.4
421
Not enough data
7.6
423
Agentic AI - Audio Conferencing
Not enough data
7.4
268
Not enough data
7.5
268
Action Item Detection - AI Note-taking Software
Not enough data
8.7
10
Not enough data
9.0
10
Automatic Transcription - AI Note-taking Software
Not enough data
9.4
11
Collaboration & Sharing - AI Note-taking Software
Not enough data
9.2
10
Language & Accent Support - AI Note-taking Software
Not enough data
9.1
11
Multi-Platform Integration - AI Note-taking Software
Not enough data
8.8
11
Privacy & Security Controls - AI Note-taking Software
Not enough data
8.8
12
Searchable Note Archives - AI Note-taking Software
Not enough data
8.5
10
Speaker Identification - AI Note-taking Software
Not enough data
8.9
11
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
8.5
708
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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