Mattermost vs Microsoft 365
Updated June 2026 · A structured head-to-head comparison.
Open-source, self-hosted team chat.
Word, Excel, PowerPoint, and Teams.
The verdict
Both Mattermost and Microsoft 365 are credible team chat tools, and the right pick comes down to your priorities.
Choose Mattermost if you want a lower starting price (free – $10/user/mo), a free plan to start on and broader platform coverage. Open-source, self-hosted team chat.
Choose Microsoft 365 if you'd rather have a longer free trial (30 days) and a higher overall rating (4.6/5). Word, Excel, PowerPoint, and Teams.
Mattermost vs Microsoft 365: side by side
| Dimension | Mattermost | Microsoft 365 |
|---|---|---|
| Starting price | Free – $10/user/moWinner | From $6/user/mo |
| Free plan | YesWinner | No |
| Free trial | — | 30 daysWinner |
| Pricing model | Freemium | Subscription |
| Best for | Enterprise, Government, Devops Teams | Enterprise, Smb |
| Platforms | Web, Windows, Mac, Linux, Ios, Android, Self HostedWinner | Web, Windows, Mac, Ios, Android |
| Rating | 4.3/5 | 4.6/5Winner |
Mattermost key facts
- Vendor
- Mattermost
- Pricing
- Freemium — Free – $10/user/mo
- Free tier
- Yes
- Platforms
- Web, Windows, Mac, Linux, Ios, Android, Self Hosted
- Best for
- Enterprise, Government, Devops Teams
- Editor rating
- 4.3 / 5
- Founded
- 2016
- Headquarters
- Palo Alto, CA, USA
Microsoft 365 key facts
- Vendor
- Microsoft
- Pricing
- Subscription — From $6/user/mo
- Free tier
- Free trial (30 days)
- Platforms
- Web, Windows, Mac, Ios, Android
- Best for
- Enterprise, Smb
- Editor rating
- 4.6 / 5
- Founded
- 2011
- Headquarters
- Redmond, WA, USA
Frequently asked questions
Is Mattermost better than Microsoft 365?
Neither is universally better — Microsoft 365 edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Mattermost or Microsoft 365 cheaper?
Mattermost is the more affordable of the two to get started, at free – $10/user/mo. Mattermost starts at free – $10/user/mo; Microsoft 365 starts at from $6/user/mo.
Can Mattermost replace Microsoft 365?
Yes for most teams — both are team chat tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.