Not enough public prices to compare the cost.
Mattermost Professional vs Slack Pro
Price, free plan and alternatives, side by side
The comparison in short
- Mattermost Professionalno free plan
- Slack Prohas a free plan
Mattermost Professional
With trade-offs
multi-day
To start without paying, Slack Pro has a free plan. If you would rather build it, Mattermost Professional is the simplest to rebuild.
Side-by-side comparison
| APPLICATION | Mattermost ProfessionalCommunities |  Slack ProCommunities |
|---|---|---|
| Monthly billing | Not listed | $8.75/mo$8.75Pro |
| Per year | — | $87/yrannual plan · −17% |
| Billing model | Custom pricing | Per person |
| Free tier | — | 90-day message/file history; 10 app integrations; 1:1 huddles; 1:1 Slack Connect |
| Additional costs | — | A paid plan applies to the whole workspace. Active-member/fair-billing adjustments are prorated; multi-channel guests count as paid members while eligible single-channel guests can be free. The advertised 50%-for-3-months offer is temporary and only for eligible new monthly-billed workspaces. |
| Can you rebuild it? | With trade-offsmulti-day | Worth subscribingclosest consolation build: one sitting |
| Free alternatives | +2 | +3 |
| Checked on | 10/20/2026 | 10/20/2026 |
| Buy on the official site | Buy View app page | Buy View app page |
The free plan compares up to 2 apps. Pro compares up to 4. See plans →
Also compare with
Direct rivals of the apps on this page, from the same category.
Prices from each app’s latest check; confirm on the official site before buying.