centilio
Centilio

Explore the products

A business OS.
Room to grow.

Start with one tool. Explore the wider suite as your needs grow.

Explore Centilio One ↗Product availability follows the catalogue.
CENTILIO BOOK / SELL · EMBER

The best appointment scheduling software, compared — including the ones we would tell you to buy instead.

Book is not built, so every one of these comparisons ends with a row the others do not have: theirs ships today and ours does not. Three we recommend outright on their own pages — Cal.com if you are one person, Setmore if you are four or fewer, Square if you are a salon already taking card payments on Square. We think the design is better for a business where several people share one diary, and we would rather argue that in public on published list prices than wait until launch to be evaluated.

list prices · 7 September 2026corrections welcomenot shipped, and it says so

Product design preview · Book has not shipped. All plans, integrations and screens are proposals.

Book has not shipped yet.

Book is not available yet. These are proposed screens, features and prices—not a beta or a live booking service. The interactive diary uses fictional data; no appointment, message, deposit or customer record leaves this page.

The short version

What is true in every comparison.

The meter charges you for growing

Per seat at Calendly ($10 to $16), Cal.com ($12 to $28) and Setmore; per calendar band at Acuity; per location at Square ($49); per booking at SimplyBook.me. A clinic that hires a fourth clinician is charged for it by every one of them.

Free plans are shaped to fail

Calendly gives you one event type and one calendar connection. SimplyBook.me stops at fifty bookings a month. Acuity has no free plan at all. Setmore and Cal.com are the honourable exceptions and we say so on their pages.

The booking ends where it should start

Every tool here books a time well. Almost none of them hold a deposit that becomes an invoice, attach the intake form to the appointment, and put the visit on a customer record with the previous three on it.

Questions

About switching — later.

Are these comparisons fair?

They are meant to be. Every price was read from the vendor's own pricing page on 7 September 2026 and each page says plainly when the other tool is the better buy — which for a single user is most of them.

Which is the closest competitor?

Zoho Bookings, on logic: another suite, another "it is already next to your CRM" argument. It is priced per user and it works today; Book is priced per business and does not exist yet.

Which one would you use today?

Cal.com if you are one person, Setmore if you are up to four, Acuity if you want one polished thing and do not mind the calendar bands, Square if you are a salon that already takes card payments on Square.

Next for you

What people add after Book.

What the booking touches on its way through: the record, the deposit, the reminder and the room.

Be told when Book opens.

Wave 2 is the next build after the live tools. Leave your name and you will hear before the announcement — and tell us what your no-show rate is today, because that is the number we intend to move.