Mattermost
Sales quote
No public priceask sales
Per year
Quote
No public price
Mattermost vs Slack
Compare with for .
Mattermost
50%
match · quote
Slack
78%
match · $870/yr
Slack is the better fit.
It publishes its prices; the other needs a sales quote.
How we work out the matchWhat matters most?
Fine-tune
What you'd pay
Entry plan for 10 people, billed yearly where offered. Prices checked Oct 2026.
Slack
Pro
$7.25 × 10 seats$72.50
× 12 months$870.00
Per year
$7.25 per person / mo
$870
Mattermost
From FreeFree plan
G2 4.3 · 369 reviewsSecurity-sensitive and regulated organizations, and DevOps teams, that must run Slack-style chat on their own servers and want incident playbooks next to the chat.
vs
Slack
From $7.25Free plan
G2 4.5 · 39,319 reviewsTeams that are happy to let a vendor host their chat and want the most polished app with the most integrations.
Side by side
| Mattermost |  Slack | |
|---|---|---|
| Pricing | Free self-hosted editions; paid plans by quote | Free; paid from $7.25/user/month (annual) |
| G2 Rating | 4.3 (369 reviews) | 4.5 (39,319 reviews) |
| Best For | Security-sensitive and regulated organizations, and DevOps teams, that must run Slack-style chat on their own servers and want incident playbooks next to the chat. | Teams that are happy to let a vendor host their chat and want the most polished app with the most integrations. |
Pros and cons
Mattermost
Pros
- Self-hosting is the default, not an add-on
- Air-gapped and DDIL deployments on Enterprise Advanced
- Playbooks and Boards built in for incident and DevOps work
- Open source core under AGPLv3 with a large plugin platform
Cons
- No public prices for any paid plan; annual prepaid only
- Version 11 cut the free Team Edition from 1,000 to 250 users
- Free Team Edition mobile push runs on a test service with no production SLA
Slack
Pros
- Most polished chat experience and fastest onboarding
- Huge app ecosystem and Slack Connect for partners
- Clear public prices for Pro and Business+
- Data residency options for teams that need data kept in a region
Cons
- No self-hosting; your messages live in Slack's cloud
- Free plan only shows 90 days of history
- Enterprise+ costs $45/user/month billed annually and is bought through sales
Sarah Chen