Team messaging and collaboration hub. Free plan has a 90-day message history limit that forces upgrades. Per-user pricing adds up fast for growing teams.
Advertised Price
$0
/month
Estimated True Cost
$8
/month (typical usage)
Surprise Factor
N/A×
more than expected
Confidence
83%
Data source: manual
What the pricing page doesn't tell you
Free plan deletes message access after 90 days. Your team's entire knowledge base disappears quarterly. Upgrading to Pro to keep history costs $8.75/user/mo.
Trigger: messageAge > 90
+$0
/monthly
A 100-person company on Pro pays $875/mo ($10,500/yr). Business+ is $1,250/mo ($15,000/yr). The per-user model makes Slack one of the most expensive line items for growing companies.
Trigger: users > 50
+$0
/monthly
Connecting with external organizations requires Pro ($8.75/user/mo) minimum. Free plan has no external channel support. Each external org connection counts toward channel limits.
Trigger: externalOrgs > 0
+$8
/monthly
| Plan | Monthly | Annual (per mo) | Key Limits | Overage Rules |
|---|---|---|---|---|
Free | $0 | $0 |
| No overages |
ProPOPULAR per user | $9 | $7 |
| No overages |
Business+ per user | $13 | $13 |
| No overages |
Enterprise Grid per user | $0 | $0 |
| No overages |
Slack's free plan now limits message history to 90 days (previously 10K messages). Pro at $8.75/user/mo and Business+ at $12.50/user/mo seem fair until you multiply by headcount. A 50-person team on Pro = $437.50/mo. Plus, Slack Connect, Huddles, and workflow automations have their own limits.
Slackoffers a free plan, but with significant restrictions. Here's exactly what you get — and what forces you to upgrade.
⚠️ When you'll need to upgrade:
Most teams outgrow the free plan within 1-3 months. The first paid tier (Pro) costs $9/mo.
⚠️ When you'll need to upgrade:
Most teams outgrow the free plan within 1-3 months. The first paid tier (Pro) costs $9/mo.
Slackcharges per user. Here's what your team will actually pay at different sizes.
| Team Size | Pro | Business+ |
|---|---|---|
| 1 user | $8.75/mo | $12.5/mo |
| 3 users | $26.25/mo | $37.5/mo |
| 5 users | $43.75/mo | $62.5/mo |
| 10 users | $87.5/mo | $125/mo |
| 25 users | $218.75/mo | $312.5/mo |
| 50 users | $437.5/mo | $625/mo |
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