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CommunicationPublic
Slack
Business messaging built around channels and workflows, acquired by Salesforce for $27.7B in 2021. Positioned as the alternative to email threads for team communication. Distinctive for its integrations depth (2,500+ apps) and the way it exposed how much internal knowledge lives in messages. Priced per ACTIVE user (not per seat) — inactive users don't bill, but active-member spikes surprise finance teams. Salesforce raised Business+ tier from $12.50 to $15/user in 2026 to fund AI features.
Starts at
$8.75/mo
$7.25/mo billed annually
Annual discount
Save 17% with annual billing
Free planPer SeatBothEnterprise available
All plans
| Plan | Monthly | Annual | Key limit |
|---|---|---|---|
Free | Free | Free | 90-day message history + 10 integrations |
ProEntry tier | $8.75 | $7.25Save 17% | unlimited history + unlimited apps |
Business+ | $15 | $15 | SSO + compliance + AI features |
Enterprise Grid | Custom | Custom | multi-workspace + advanced admin |
All tier prices verified June 29, 2026 · View source →
At a glance
- Key limit metric
- message history
- Pricing transparency
- Public
Integrations
Integrates and connects
API access
Yes
Zapier / Make native
Yes
Ease of use
Easy
Key integrations
Google DriveZoomSalesforceAsanaNotion
Frequently asked questions
About Slack pricing.