Built for lean teams,
scaled for category leaders
Thanks. You're signed up.
Something went wrong. Please try again.
Want the full setup walkthrough?
Use these docs for exact setup steps, supported fields, and troubleshooting.
When a referred friend books through the Cal.com scheduler on your website, GrowSurf can add them to your referral program and credit the person who sent them. Cal.com sends the attendee to your thank-you page with their name and email address in the link, and a GrowSurf code block on that page reads them.
You turn on one setting for the event type and paste one code block on your thank-you page. The same setup works for an affiliate program. There, GrowSurf credits each lead to the affiliate who sent it.
The scheduler must be embedded on your own website, and Redirect on booking needs a Cal.com Teams plan or higher. The stand-alone cal.com link does not work.
In the Program Editor, go to Installation and continue to the step that asks how GrowSurf will know a referred friend signed up. Under Using a form builder? Prep your form first, click the Cal.com icon.

The Prep your form window opens with Cal.com selected. Keep it open while you work. It lists every step and holds the code you paste later.

In Cal.com, open the event type that is embedded on your website. Open the Confirmation tab and turn on Redirect on booking. Enter the address of your thank-you page.
Keep Forward parameters turned on. That is what puts the attendee’s name and email address in the link. Then click Save.
Copy the code block from the Prep your form window and paste it anywhere on your thank-you page. When an attendee lands there, the code reads their email address and name from the link and adds them to your program.
Back in GrowSurf, choose Programmatic as the way GrowSurf will know a referred friend signed up. Then finish the remaining installation steps.
Open your own referral link in a private browser window, then fill out the form. The new person should show up in GrowSurf as referred by you. Visiting the form directly does not add anyone, so test through a referral link.
A redirect replaces Cal.com’s own confirmation page. Tell attendees their booking is confirmed on your thank-you page so they are not left guessing.
No. Cal.com sends the whole page to your thank-you page, even from an embed.
The attendee’s email address and name. If names are missing for people who booked, copy the code from GrowSurf again and replace the old one on your thank-you page.
No. The code adds someone only when GrowSurf can tell who referred them. A visitor who found your Cal.com form on their own is not added to your program.
Launch a refer-a-friend or affiliate program that lowers your acquisition costs and builds customer loyalty, with little engineering work.
Trusted by marketing and product teams that grow through customer, user, and partner referrals.
