Collect preferences
Add the responsive widget to your site. Customers choose the services, staff, dates and times that work for them.
Appointment waitlist automation
Turn canceled appointments into customer-ready openings.
SlotFill matches openings to customer preferences and automatically sends secure alerts—without replacing Wix Bookings or making you watch a waitlist all day.
Free plan available · Built for individual appointments · No credit card required to start
Today’s opening
Live
22AUG
Haircut with Jamie2:30 PM · 45 min
MP
Maya matchesService, staff, date and time
Alert sent
Live availability checked
Booking confirmedCompleted through the business’s Wix booking flow
Match preciselyService, staff, dates and time windows
Alert automaticallyOne customer at a time or all matching customers
Measure outcomesLink opens and matching confirmed bookings
How it works
A waitlist that acts when your calendar changes.
Customers give you useful preferences once. SlotFill handles the routine follow-up when a matching appointment becomes available.
Match the opening
When an appointment opens, SlotFill checks eligibility and live availability before sending an alert.
Send customers to book
The customer checks the opening and continues to your Wix booking flow. The appointment stays public until Wix confirms it.
The useful difference
More than a list of interested customers.
A manual waitlist still leaves someone watching the calendar, finding a match and contacting customers. SlotFill is built for businesses that want those opening checks and customer alerts to happen automatically.
- Choose earliest-match or all-match alert delivery
- Recheck live availability before every booking handoff
- See active entries, alert outcomes and recovered bookings
- Run a safe test workflow before relying on automation
Straightforward plans
Start free. Upgrade when the waitlist earns its keep.
Free
$0
For testing the workflow with up to 10 active waitlist entries.
Pro
$19 / month
For growing appointment businesses with up to 50 active entries.
Growth
$39 / month
For busy teams that need unlimited active waitlist entries.
Plan purchase and billing are handled through Wix. Annual options may be available in the App Market.
Questions
Know what SlotFill does—and what it leaves to Wix.
Does SlotFill replace Wix Bookings?
No. Wix Bookings remains your appointment, payment and checkout system of record. SlotFill adds the automated waitlist and availability-alert workflow.
Does an alert reserve the appointment?
No. The appointment remains publicly bookable until someone completes booking through Wix. SlotFill checks live availability before the handoff.
Which services are supported?
SlotFill is designed for individual appointment services. Classes, courses, SMS and automatic booking are not included.
Can I see it work before a real cancellation?
Yes. Test mode demonstrates the customer and owner workflow without requiring a real customer cancellation.
Recover the next opening
Give your waitlist a job to do.
Install SlotFill from the Wix App Market and run the sample workflow on the free plan.
Start with SlotFill