True cost comparison — not just what the pricing page says
Quick Verdict
Slack saves you 100%
Best for Slack
Team messaging and collaboration hub. Free plan has a 90-day message history limit that forces upgra
Best for Smartsheet
Enterprise work management platform with spreadsheet-style UI. Per-user pricing from $9-$32/user/mo,
Team messaging and collaboration hub. Free plan has a 90-day message history lim...
Advertised
$0
/month
True Cost
$8
/month (typical)
90-Day Message History Limit
Free plan deletes message access after 90 days. Your team's entire knowledge base disappears quarter...
Per-User Cost at Scale
A 100-person company on Pro pays $875/mo ($10,500/yr). Business+ is $1,250/mo ($15,000/yr). The per-...
Slack Connect External Channels
Connecting with external organizations requires Pro ($8.75/user/mo) minimum. Free plan has no extern...
$7/mo annual
Enterprise work management platform with spreadsheet-style UI. Per-user pricing ...
Advertised
$9
/month
True Cost
$482
/month (typical)
Automation Action Limits
Pro: 250 automations/mo. Business: 10,000/mo. Enterprise: unlimited. Complex workflows with multiple...
Premium Connectors Add-On
Connectors for Jira, Salesforce, ServiceNow, and Microsoft Dynamics cost $4,200/year per connector. ...
Dynamic View Add-On
Sharing filtered views with external stakeholders requires Dynamic View add-on, priced separately fr...
$9/mo annual
$19/mo annual
Slack advertises $0/mo. Smartsheet advertises $9/mo.
Slack has 3 documented hidden fees. Smartsheet has 3.
Slack confidence: 83%. Smartsheet confidence: 74%.
| Metric | Slack | Smartsheet | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $9/mo | Slack |
| True Monthly Cost | $8/mo | $482/mo | Slack |
| Hidden Fee Total | +$8/mo | +$473/mo | Slack |
| # Hidden Fees | 3 | 3 | Slack |
| Confidence Score | 83% | 74% | Slack |
| Pricing Tiers | 4 | 3 | — |
| Affiliate Program | No public affiliate program | None | — |
Slack advertises $0/mo and Smartsheet advertises $9/mo. However, when you include hidden fees, Slack has 3 documented hidden fees adding +$8/mo, while Smartsheet has 3 hidden fees adding +$473/mo. Based on true cost, Slack is typically 100% cheaper.
Slack has 3 documented hidden fees: 90-Day Message History Limit, Per-User Cost at Scale, Slack Connect External Channels. These add approximately +$8/mo on top of the $0/mo advertised price.
Smartsheet has 3 documented hidden fees: Automation Action Limits, Premium Connectors Add-On, Dynamic View Add-On. These add approximately +$473/mo on top of the $9/mo advertised price.
Choose Slack if: Team messaging and collaboration hub. Free plan has a 90-day message history limit that forces upgra. Choose Smartsheet if: Enterprise work management platform with spreadsheet-style UI. Per-user pricing from $9-$32/user/mo,. The right choice depends on your team size, usage volume, and which features you need most.
This comparison is based on manual research of official pricing pages, terms of service, and user reports. Slack data has a 83% confidence score and Smartsheet has 74%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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