The self-hosted Square Appointments alternative
Slotly — Self-hosted appointment booking engineered so it can't double-book. Own it once, run it on your own server, and stop paying Square Appointments every month.
Stop renting Square Appointments
3 months of Square Appointments equals this one-time price.
Assumption: 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.
How Square Appointments pricing grows with you
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
What Square Appointments does that we don't
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
Who should stay with Square Appointments
If you need to collect card payments online at the moment of booking, stay with Square Appointments — Slotly only quotes and tracks deposits in admin, it does not process card payments. Full honest limitations are on the product page.
Why owning beats renting Square Appointments
- One payment. No monthly, per-seat, or per-location fees — the license is perpetual.
- Your data stays on your server. It never lives in Square Appointments's cloud.
- No plan ceilings. Records and users are limited by your hosting, not a pricing tier.
- It keeps working if the vendor doesn't. Self-hosted software can't be sunset or price-hiked out from under you.
Fair trade-offs: you host it, back it up, and apply updates yourself — see the product page for honest limitations, and the full Slotly vs Square Appointments comparison.
Sources
- Square Appointments — price checked 2026-07-22 —
source “$0/mo per location - $49/mo per location - $149/mo per location”
Competitor prices change — 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.