Estimated monthly cost comparison — not just the headline price
Slack and ClickUp overlap only partly, so check that both cover what you need before comparing cost.
Prices change often — confirm on the vendor's site before buying. Report incorrect pricing →
Quick Take
Slack has the lower estimated monthly cost (~78%)
Based on advertised price plus documented recurring fees, not your exact usage.
Best for Slack
Teams that need best-in-class real-time messaging and already use separate PM tools
Best for ClickUp
Teams wanting to consolidate messaging + PM + docs into one tool to reduce SaaS spend
Team messaging and collaboration hub. Free plan has a 90-day message history lim...
Advertised
$0
/month
Estimated monthly cost
$8
/month (illustrative)
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
All-in-one project management with docs, whiteboards, and goals. Free plan is ge...
Advertised
$10
/month
Estimated monthly cost
$37
/month (illustrative)
Per-Seat Multiplication
10 users × $7/mo = $70/mo, not $7/mo. Per-seat pricing makes team growth expensive. The headline '$7...
AI Brain Add-on
ClickUp Brain AI is a SEPARATE add-on: $9/user/mo (1,500 credits) or $28/user/mo (5,000 credits). NO...
60MB Storage on Free
Free plan has only 60MB total storage — the most restrictive of any PM tool. A few file attachments ...
Automation Cap on Business
Business plan caps at 5,000 automations/month. No published overage rate — automations stop. Enterpr...
$7/mo annual
$12/mo annual
Affiliate link — we may earn a commission
Slack is messaging-first. ClickUp is project management with built-in chat — different primary functions
Slack Pro at $8.75/user/mo vs ClickUp Unlimited at $7/user/mo (annual) for full features
ClickUp includes docs, whiteboards, goals, and time tracking. Slack requires integrations for all of these
Slack has superior integrations ecosystem (2,000+ apps). ClickUp's native features reduce the need for integrations
| Metric | Slack | ClickUp | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $10/mo | Slack |
| Estimated Monthly Cost | $8/mo | $37/mo | Slack |
| Recurring Extra Fees | +$8/mo | +$27/mo | Slack |
| One-Time Costs | $0 | $0 | — |
| # Documented Fees | 3 | 4 | — |
| Pricing Tiers | 4 | 4 | — |
| Affiliate Program | No public affiliate program | 20% recurring | — |
Try the tool that fits your needs. Both offer free trials or free tiers.
Slack advertises $0/mo and ClickUp advertises $10/mo. Slack has 3 documented extra fees (recurring: +$8/mo), while ClickUp has 4 (recurring: +$27/mo). On these illustrative assumptions, Slack has the lower estimated monthly cost (about 78% less). Your real cost depends on seats and usage — use the calculator for your numbers.
Slack has 3 documented extra fees: 90-Day Message History Limit, Per-User Cost at Scale, Slack Connect External Channels. Recurring fees add roughly $8/mo on top of the $0/mo advertised price.
ClickUp has 4 documented extra fees: Per-Seat Multiplication, AI Brain Add-on, 60MB Storage on Free, Automation Cap on Business. Recurring fees add roughly $27/mo on top of the $10/mo advertised price.
Choose Slack if: Teams that need best-in-class real-time messaging and already use separate PM tools. Choose ClickUp if: Teams wanting to consolidate messaging + PM + docs into one tool to reduce SaaS spend. The right choice depends on your team size, usage volume, and which features you need most.
This comparison is compiled from public vendor pricing pages and documentation. It uses illustrative assumptions (see "Cost Comparison Summary"), not your exact seats or usage, and vendor prices change often. Confirm current prices on each vendor's site, and use our calculator with your own usage for a closer estimate. Spotted an error? Email hello@trulycritic.com.
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