One booking.
Closed at every agency instantly.
No more WhatsApp chaos or "was this one still free?". Keep calendars in sync within seconds with one network built for property owners and agencies.
Only for property owners and agencies who trade professionally
- < 0 s
- second to reach every subscriber
- 0
- standard amenity keys
- 0 days
- of webhook retries
- 0%
- clash protection (at database level)
Move from manual tracking to automation
A firm answer to messages lost in WhatsApp groups, spreadsheets nobody updates and double bookings.
The old way (chaos and errors)
Is Villa Mavi free 15-20 August? Need an answer fast, the customer is waiting.
Agency 1 • 10:42Checking my notebook… I think Mrs Ayşe held it but I am not sure, let me ask.
Owner • 10:45Oh no, we just sold it to another family from our own site! Double booking.
Agency 2 • 10:46CesiSync (order and speed)
Villa Mavi
August 2027
The whole network sees the same screen
Try it yourself
Click a free night in one agency's calendar: it closes in the other three within a blink, and the webhook log runs underneath.
Kaş Villaclick here
Fethiye Tatil
Akdeniz Rent
Blue Stay
No events yet. Click a date.
A great experience for both sides
Property owners
Manage prices and availability from one place. Reach every agency you approve within seconds.
- 1
One calendar for everything
Open, close or block dates. Airbnb and Booking.com iCal calendars are imported too; every agency updates instantly.
- 2
Rate periods
Enter a holiday or season price once and every subscribed agency is updated. Set a commission rate per agency if you like.
Travel agencies
See live availability of approved properties. Hold and book without asking or waiting.
- 1
Sell without asking
If the system shows it free, it is free. Place a hold or book it; never keep the customer waiting.
- 2
Connect your own site by API
Show availability and rates on your own site or software: REST API, webhooks and iCal are ready.
Your data is yours
Work without being locked into one vendor. Take your data any time, end a subscription with a click, decide who sees what.
Download any time
As JSON, a photo ZIP, CSV and iCal; the whole property is yours once subscribed.
You decide
Instant approval or request-based subscriptions. You choose who sees the calendar and how long holds may last.
Instant and reliable
One booking closes the dates for every subscriber within seconds; even a missed event is caught by its sequence number.
Private by default
Agencies never see each other's bookings or guests. Contact details open once a subscription is approved.
Integration takes minutes
A modern REST API, signed webhooks and a sandbox that never touches real data make connecting your app easy. Clean documentation is waiting.
Stop polling; we push signed events to your system and retry when they fail.
A full OpenAPI 3.1 spec and Postman collection; examples and signature verification code for Node, PHP, Python, C# and Go.
▌Pricing
Launch offer: every plan is $0 for the first 3 months for owners and agencies, then the same monthly price for both. Per-transaction fee: 0% launch offer.
For agencies
By the number of properties you can subscribe to. First 3 months free.
Starter
$19.90/ month
First 3 months: $0
- Subscribe to up to 100 properties
- Launch offer: 0% per-transaction fee
- Calendar, rates, holds, API and webhooks
- First 3 months free
Professional
$39.90/ month
First 3 months: $0
- Subscribe to up to 500 properties
- Launch offer: 0% per-transaction fee
- Calendar, rates, holds, API and webhooks
- First 3 months free
Unlimited
$49.90/ month
First 3 months: $0
- Unlimited property subscriptions
- Launch offer: 0% per-transaction fee
- Calendar, rates, holds, API and webhooks
- First 3 months free
For property owners
By the number of partner agencies you can work with. First 3 months free, then the same price as agencies.
Starter
$19.90/ month
First 3 months: $0
- Up to 100 partner agencies
- Launch offer: 0% per-transaction fee
- Unlimited properties, calendar and rate tools, WhatsApp updates
- First 3 months free
Professional
$39.90/ month
First 3 months: $0
- Up to 500 partner agencies
- Launch offer: 0% per-transaction fee
- Unlimited properties, calendar and rate tools, WhatsApp updates
- First 3 months free
Unlimited
$49.90/ month
First 3 months: $0
- Unlimited partner agencies
- Launch offer: 0% per-transaction fee
- Unlimited properties, calendar and rate tools, WhatsApp updates
- First 3 months free
Prices exclude tax. For businesses in Türkiye, VAT is declared by the recipient as the responsible party.
Frequently asked questions
Is this a booking website for guests?
No. CesiSync is for professional property owners and agencies only; there are no consumer accounts. Guests still book on the agencies' own sites.
Do owners pay?
During the launch every plan is free for the first 3 months. After that owners pay the same monthly plan prices as agencies; nothing is charged before the trial ends. The sandbox is always free.
Who sees my calendar?
Only agencies you approve (or that subscribe, if you chose instant approval). Other agencies' bookings show only as "busy"; no agency name or guest detail is ever shared. You can end a subscription with one click.
How are double bookings prevented?
CesiSync is the single source of truth and the database itself refuses two overlapping records for one property. Even 50 simultaneous requests for the same nights let exactly one through. The moment a booking is accepted the dates close for every subscriber and webhooks go out.
How do I move from my current system?
Owners add the iCal address of Airbnb, Booking.com or their current system; it is read every 15 minutes and busy dates spread to all subscribers. Agencies connect with the API, webhooks or iCal, and you can download your data as JSON, ZIP, CSV or iCal at any time.
One platform.
Zero clashes.
Say goodbye to manual work. Every plan is free for the first 3 months; the sandbox is always free and prices are on the pricing page.