The self-hosted Square Appointments alternative
Slotly: Self-hosted appointment booking that refuses a second booking for a slot already taken, even when two people try at the same moment. Own it once, run it on your own server, and stop paying Square Appointments every month.
Stop renting Square Appointments.
Slotly3 months of Square Appointments costs what Slotly costs once.
Buy onceHow we counted: Free plan covers basics; Plus $49/mo per location, Premium $149/mo (read 2026-07-22). A 2026-09-03 re-read could NOT verify these: the page served an unrendered shell with template tokens and no prices, confirmed twice. Square's own press page, read the same day, does publish Free $0 / Plus $49 / Premium $149 per location - corroboration, but at a different address than this row cites, so the date stays. Note: the $35/mo + $6/person figure on Square pages is Square Payroll, not Appointments.
Square Appointments' Plus and Premium plans charge a flat monthly fee per business location, so a multi-location business pays more as it adds locations.
“With Square Plus and Square Premium, the monthly fee applies to each location you run.”, their own page, read 2026-08-11
Square Appointments includes unlimited staff calendars on its plans, with no cap on how many employees you can add.
“Add and view as many staff calendars as your business needs. There is no employee limit.”, their own page
If you want card payments taken at booking without holding your own Stripe account, stay with Square Appointments — Slotly takes a deposit or the full price by card at booking only through your own Stripe account, when you switch it on, and every refund is made in your Stripe dashboard.
What Slotly deliberately doesn't do is on its product page.
Why owning beats renting Square Appointments.
No monthly, per-seat or per-location fees. The license is perpetual.
It never lives in Square Appointments's cloud.
Records and users are limited by your hosting, not by a pricing tier.
Self-hosted software can't be sunset or repriced out from under you.
The fair trade-offs: you host it, back it up and apply updates yourself. See the product page for its limits, and the full Slotly vs renting comparison.
Questions about moving off Square Appointments.
Does it take payment online?
What do automatic reminders need?
Can I run group classes?
MySQL or SQLite?
Related on this site
Sources
- Square Appointments: price checked 2026-07-22, source“$0/mo per location - $49/mo per location - $149/mo per location”
Competitor prices change, so always confirm on the linked page. We only print figures we could verify on the date shown. This vendor is tracked in the Price Observatory: every figure verbatim, dated, re-checked quarterly.