True cost comparison — not just what the pricing page says
Quick Verdict
Calendly saves you 100%
Best for Calendly
Scheduling automation platform. Free for 1 event type, then $10-$16/seat/mo — but team features, rou
Best for Trello
Atlassian's visual Kanban board tool. Free plan is limited by Power-Up restrictions, automation caps
Scheduling automation platform. Free for 1 event type, then $10-$16/seat/mo — bu...
Advertised
$0
/month
True Cost
$37
/month (typical)
Team Features Require Teams Plan
Round-robin scheduling, routing forms, and Salesforce integration require Teams plan at $16/seat/mo ...
Routing Add-On
Calendly Routing for lead qualification and distribution to the right rep requires Teams plan ($16/s...
SMS Notifications
SMS event notifications and reminders cost $25/mo as a separate add-on. Not included in any plan. Re...
Atlassian's visual Kanban board tool. Free plan is limited by Power-Up restricti...
Advertised
$5
/month
True Cost
$20
/month (typical)
Power-Up Limit on Free
Free plan allows only 1 Power-Up per board. Need Slack + Google Drive + Calendar? That is 3 Power-Up...
Automation Command Caps
Free: 250 command runs/mo. Standard: 1,000. Premium: 6,000. Complex automations burn through limits ...
View Restrictions
Dashboard, Timeline, Calendar, and Map views require Premium at $10/user/mo. Free and Standard only ...
10MB Attachment Limit on Free
Free plan caps file attachments at 10MB per file. Standard allows 250MB. Teams sharing design files,...
Calendly advertises $0/mo. Trello advertises $5/mo.
Calendly has 3 documented hidden fees. Trello has 4.
Calendly confidence: 77%. Trello confidence: 80%.
| Metric | Calendly | Trello | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $5/mo | Calendly |
| True Monthly Cost | $37/mo | $20/mo | Trello |
| Hidden Fee Total | +$37/mo | +$15/mo | Trello |
| # Hidden Fees | 3 | 4 | Calendly |
| Confidence Score | 77% | 80% | Trello |
| Pricing Tiers | 3 | 4 | — |
| Affiliate Program | No public affiliate program | No public affiliate program | — |
Calendly advertises $0/mo and Trello advertises $5/mo. However, when you include hidden fees, Calendly has 3 documented hidden fees adding +$37/mo, while Trello has 4 hidden fees adding +$15/mo. Based on true cost, Calendly is typically 100% cheaper.
Calendly has 3 documented hidden fees: Team Features Require Teams Plan, Routing Add-On, SMS Notifications. These add approximately +$37/mo on top of the $0/mo advertised price.
Trello has 4 documented hidden fees: Power-Up Limit on Free, Automation Command Caps, View Restrictions, 10MB Attachment Limit on Free. These add approximately +$15/mo on top of the $5/mo advertised price.
Choose Calendly if: Scheduling automation platform. Free for 1 event type, then $10-$16/seat/mo — but team features, rou. Choose Trello if: Atlassian's visual Kanban board tool. Free plan is limited by Power-Up restrictions, automation caps. 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. Calendly data has a 77% confidence score and Trello has 80%. Prices were last verified in April 2026. For the most accurate estimate, enter your specific usage in our calculator.
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