No native Calendly waitlist. We're fixing that.
Never lose a canceled Calendly slot again.
When a client cancels, SlotBack instantly texts your waitlist. The first person to claim it books the slot — no manual scrambling.
Built for solo practitioners on Calendly. Free for early users.
See how it worksEvery open slot is money you're not making
A cancellation is lost revenue
Most slots that open up never get rebooked. That's an hour of income gone, every time.
Manual texting eats your day
Messaging clients one by one about an opening isn't worth the time it takes.
Calendly has no waitlist
Square and Acuity both do. Calendly users have been asking for years.
How it works
Step 1
Connect your Calendly
One click, no setup work.
Step 2
Clients join your waitlist
Whenever your times are full.
Step 3
The slot refills itself
A cancellation texts your waitlist automatically.
Built for solo practitioners
- Therapists
- Coaches
- Consultants
- Personal trainers
- Recruiters
Be first in line when it launches
No spam. One email when the beta opens.