Is Slack free? What it actually costs in 2026
The short answer
Yes, there is a free tier — with limits.
Per-user monthly plans; the free tier hides older message history
What you are locked into
Cloud-only hosting and per-seat billing; your history and integrations sit on Salesforce's terms.
If you would rather not pay: Mattermost
88
Mattermost
Self-hosted team chat built for security-conscious orgs.
Free self-host; paid Enterprise
See all 3 Slack alternatives comparedCompare the free options head-to-head
Pricing is verified against the vendor's published figures and dated above. Vendors change prices — confirm current numbers with Salesforce before you commit. More team chat decisions on Macrostack.