Cal.com schedules. Apointo proves the appointment came from the ad.
Cal.com is solid open-source scheduling: self-hosting, app ecosystem, good booking UX. Its ad attribution is shallow by design: parameters get lost between pages, and the appointment outcome never returns to Google Ads.
Independent comparison based on public documentation and pages. No paid rankings, no sales scores. Where the other tool is better, we say so.
Open-source scheduling with self-hosting and full brand control
Large app ecosystem and calendar integrations
Good native booking experience if you are switching tools
UTMs get lost between pages
Visitors landing on the homepage with UTMs who navigate to the booking page record a reservation with no channel. Apointo preserves first- and last-touch across the session and attaches both to the conversion.
Only the 5 standard parameters, field by field
Beyond default UTMs, Cal.com needs hidden questions configured per client. Apointo carries gclid, gbraid, wbraid, fbclid, msclkid, UTMs, landing page, and referrer on every event.
Events reach analytics only through manual GTM work
bookingSuccessfulV2 fires into the dataLayer; from GA4 onward it is your job. Apointo delivers the confirmed outcome to Google Ads as an offline conversion without building tags.
No path back to the ad account
There is no offline-conversion upload in Cal.com. Apointo returns gclid + value to Google Ads through the Data Manager API, with retraction when the outcome changes.
- You need to REPLACE your scheduler today
- Self-hosting and open source are hard requirements
- Organic booking dominates your mix
- Your scheduler works but campaigns cannot prove revenue
- Campaigns optimize on clicks because nobody returns the sale
- You serve clinics under GDPR/LGPD and need per-regime consent
436
leads captured, 100% with an attribution payload
89
with a Google Ads gclid attached
15/50
appointments confirmed in the ledger
€3,410
in marked conversion value (11 leads)
8 of 8 appointments confirmed
One tenant closed the period with every appointment confirmed on the calendar - none left pending. Each one traceable from ad click to visit.
7 of 10 confirmed, 3 already valued
Another tenant tracks 10 bookings through the ledger, 7 confirmed and 3 already marked as conversions with value for Google Ads.
141 leads in a single tenant, all attributed
The most active tenant passed 140 captured leads, each carrying the full attribution payload - source, campaign, and session.
Numbers extracted from the production ledger in Aug 2026. Tenants anonymized; industry descriptors omitted because they were not verified per case. Small volumes because the product is new - but real and auditable, not projections.