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Compare Mattermost and Slack 
Featured Products
At a Glance
Market Segments
Mid-Market (38.0% of reviews)
Small-Business (41.2% of reviews)
Entry-Level Pricing
$0.00
$0.00
Mattermost
Star Rating
(363)4.3 out of 5
Market Segments
Mid-Market (38.0% of reviews)
Pros & Cons
Entry-Level Pricing
$0.00
Browse all 3 pricing plansSlack
Star Rating
(38,271)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 facilitating organized team communication, with features like channels that keep conversations structured and easy to follow. Users appreciate the seamless real-time collaboration and the ability to integrate with various tools, enhancing productivity.
- Users say Mattermost provides a strong focus on security and customization, making it a preferred choice for organizations that require self-hosting. Reviewers highlight the ease of direct messaging and group chat creation, which allows for quick and efficient communication without compromising on control.
- According to verified reviews, Slack's implementation process is notably quick and intuitive, with users praising the onboarding experience. This ease of setup contributes to a smoother transition for teams looking to adopt a new communication tool.
- Reviewers mention that while Mattermost offers robust features for team messaging, it sometimes lacks the integrations and flexibility that Slack provides. Users have noted that Slack's extensive integration capabilities streamline workflows, making it easier to collaborate across different platforms.
- G2 reviewers highlight that Slack's mobile application is highly rated, allowing users to stay connected on the go. The app's functionality supports effective communication, which is crucial for teams that require flexibility in their work environments.
- Users report that while both platforms offer file sharing, Slack's system is often seen as more efficient, with users noting that sharing documents is quick and straightforward. This feature is particularly beneficial for teams that rely heavily on document collaboration.
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
31,209
Ease of Use
8.9
306
9.2
32,145
Ease of Setup
8.1
96
9.2
8,515
Ease of Admin
8.3
69
8.9
5,062
Quality of Support
8.2
231
8.8
21,715
Has the product been a good partner in doing business?
9.0
58
9.0
4,539
Product Direction (% positive)
8.4
295
8.7
30,513
Features by Category
Business Instant Messaging
8.7
196
9.1
13939
8.6
203
9.0
14488
8.0
191
8.6
13783
Business Instant Messaging
7.8
119
8.5
10234
7.9
111
8.1
9558
Business Instant Messaging
8.0
178
9.1
13663
8.9
189
9.2
13284
8.3
166
9.0
11822
Generative AI - Business Instant Messaging
4.9
15
7.6
1509
AI - Business Instant Messaging
5.3
15
7.5
1493
6.2
15
8.0
1497
4.6
14
7.4
1475
5.7
14
7.4
1477
Agentic AI - Business Instant Messaging
5.9
11
7.7
905
5.3
11
7.7
892
Setup
8.5
20
9.1
693
8.8
20
8.9
681
7.9
20
8.7
664
8.7
21
9.0
700
Management
8.7
19
9.0
675
8.0
19
8.7
656
8.1
20
8.9
670
Generative AI
6.9
12
7.8
576
Agentic AI - Workflow Management
Not enough data
7.8
294
Not enough data
8.0
291
Not enough data
8.2
299
Not enough data
8.0
296
Not enough data
8.0
295
Not enough data
8.0
296
Not enough data
8.1
297
Account Options
Not enough data
9.2
289
Not enough data
8.4
283
Not enough data
8.7
279
Not enough data
8.7
282
Not enough data
9.0
289
Not enough data
8.9
286
Q&A Tools
Not enough data
9.1
290
Not enough data
9.1
286
Not enough data
9.1
292
Not enough data
8.7
279
Not enough data
9.1
285
Not enough data
8.9
282
Not enough data
8.6
275
Not enough data
8.9
278
Not enough data
8.5
275
Knowledge Pages
Not enough data
8.5
352
Not enough data
8.3
350
Not enough data
8.2
342
Not enough data
8.2
338
Not enough data
8.0
333
Not enough data
8.4
338
Knowledge Dissemination
Not enough data
8.2
327
Not enough data
8.8
337
Not enough data
9.0
342
Not enough data
9.0
339
Not enough data
8.4
337
Not enough data
8.3
326
Not enough data
8.7
341
Not enough data
8.6
327
Not enough data
8.6
323
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
774
Not enough data
8.5
749
Productivity
Not enough data
8.0
738
Not enough data
8.3
741
Not enough data
8.6
746
Not enough data
7.9
720
Not enough data
7.9
718
Customization
8.9
19
8.6
741
Not enough data
9.0
756
Not enough data
8.7
727
Agentic AI - Unified Workspaces
Not enough data
7.5
420
Not enough data
7.6
417
Compatibility
Not enough data
9.1
97
Not enough data
9.1
102
Not enough data
9.0
95
Agentic AI - Enterprise Search Software
Not enough data
8.7
66
Not enough data
8.6
62
Not enough data
9.1
64
Not enough data
8.8
64
Not enough data
8.8
64
Not enough data
8.9
62
Search Queries
Not enough data
8.9
97
Not enough data
9.2
95
Not enough data
8.8
94
Not enough data
9.1
95
Not enough data
9.0
94
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
31
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
1230
Not enough data
8.8
1186
Not enough data
8.5
1162
Administration
Not enough data
8.8
1187
Not enough data
8.7
1143
Not enough data
9.4
1247
Project management
Not enough data
8.7
1171
Not enough data
8.5
1129
Not enough data
8.6
1151
Not enough data
8.5
1135
Not enough data
8.6
1136
Not enough data
8.3
1103
Not enough data
8.3
1134
Workload
Not enough data
8.4
1090
Not enough data
8.8
1150
Not enough data
8.6
1099
Not enough data
8.5
1093
Communication & Collaboration
Not enough data
9.3
1479
Not enough data
9.0
1230
Not enough data
9.3
1316
Cost Management
Not enough data
8.1
1080
Not enough data
8.2
1082
Not enough data
8.1
1073
Integration
Not enough data
8.6
1138
Not enough data
8.4
1080
Not enough data
8.4
1071
Generative AI
Not enough data
7.6
1029
Not enough data
7.7
1027
Agentic AI - Work Management
Not enough data
7.7
531
Not enough data
7.8
524
Not enough data
8.1
530
Not enough data
7.9
526
Communication
Not enough data
9.4
1196
Not enough data
9.3
1186
Not enough data
8.9
1064
Not enough data
8.9
1051
Not enough data
9.1
1057
Content & Documents
Not enough data
9.2
1112
Not enough data
8.9
1053
Not enough data
8.7
1073
Not enough data
8.2
1014
Controls
Not enough data
8.3
999
Not enough data
8.1
992
Not enough data
8.7
1005
Not enough data
8.4
1011
Not enough data
8.2
979
Project Management
Not enough data
8.4
1004
Not enough data
8.4
985
Not enough data
8.5
1003
Not enough data
8.7
997
Remote Collaboration
Not enough data
9.0
1011
Not enough data
8.7
980
Not enough data
9.0
1000
Not enough data
7.9
967
Generative AI
Not enough data
7.3
936
Not enough data
7.4
935
Agentic AI - Project Collaboration
Not enough data
7.6
447
Not enough data
7.7
451
Agentic AI - Audio Conferencing
Not enough data
7.6
288
Not enough data
7.7
288
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
741
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
20.7%
Computer Software
14.4%
Financial Services
4.6%
Computer & Network Security
4.0%
Internet
3.7%
Other
52.4%
Computer Software
15.3%
Information Technology and Services
13.1%
Marketing and Advertising
8.7%
Internet
4.7%
Financial Services
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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