Payments & subscriptions
Stripe
Stripe processes online card payments and KISB subscriptions. KISB never stores card details.
Integrations
Connect your booking system to the tools you already use.
Automated payments via Stripe, calendar or full portal synchronisation and an optional guest AI — with clear scope and pricing.
Proven infrastructure
Recognisable technology. A clearly defined role.
Not just a row of logos: KISB tells you exactly which technology handles which part of your booking system.
Live
Data hosting in Germany
Hetzner
Production booking and customer data runs on Hetzner servers in Germany.
Portal connectivity
Channex
The optional full Channel Manager connects KISB to Airbnb and Booking.com through Channex.
Open calendar standard
iCal
The lower-cost calendar sync exchanges occupied dates through iCal, with its limits explained clearly.
Every service and connection has one clear job. Add-ons remain optional and are never required for the standard booking system.
Four connections. One coherent system.
Choose only what helps your operation. Every connection has a defined job instead of disappearing into a vague ‘all-in-one’ promise.
Stripe
Automated billing via Stripe
Available nowPayment card details are processed directly by Stripe and are not stored in Keep it Simple Booking.
iCal
Calendar Sync via iCal
Available nowKeeps occupied dates aligned between Keep it Simple Booking, Airbnb and Booking.com at a low monthly price.
Channex
Full Booking.com & Airbnb Channel Manager
Available nowKeeps reservations, availability and rates aligned between Keep it Simple Booking and your connected portals.
KISB AI
AI chat for guests
Available nowAnswers guest questions about prices, amenities and availability — around the clock, using the real data from your system.
AI WITH A CLEAR PURPOSE
AI as a tool – not as the foundation.
Bookings, payments and channel synchronisation work independently of AI. Claude is used only in the optional guest chat, where quick answers genuinely help.
TECHNOLOGY IN USE
Claude by Anthropic
Answers guest questions using the information you approve about your offer, amenities, prices and availability.
You decide
The AI chat is not required to use KISB. Add it, enable it later or leave it out entirely.
Limited access
Claude receives only the business information approved for an answer – never unrestricted access to your admin area or database.
Transparent processing
The visitor's message is sent to Anthropic to generate an answer. Personal booking, customer and payment data from KISB is not included.
01
Full Booking.com & Airbnb Channel Manager
New and changed portal bookings appear in your KIS calendar. Availability, seasonal rates and minimum stays flow back through the official Channex connection.
Calendar Sync via iCalFull Booking.com & Airbnb Channel ManagerAutomated billing via StripeAI chat for guests
Optional add-ons — only when you need them
The regular booking system remains complete. Portal synchronisation and AI chat can be added separately.
KIS only
€49.90/month. No portal add-on needed.
KIS + Calendar Sync
+€19.90/month per business.
Availability via iCal for all accommodation. No rates or booking details; portal refreshes are delayed.
KIS + Full Channel Manager
+€79.90/month per connected business or location.
All accommodation synced at that business is included. 0% booking commission and cancellable monthly.
Calendar Sync via iCal
Available nowKeeps occupied dates aligned between Keep it Simple Booking, Airbnb and Booking.com at a low monthly price.
KIS imports portal calendars every 15 minutes and gives every accommodation a protected calendar URL for the portals to import.
Not real-time: each portal chooses its own refresh interval. No rates, minimum stays, guest details, messages or payments are transferred.
Ideal when you only need availability and continue to manage rates and reservation details in each portal.
€19.90/month per businessBookable in your admin area
Full Booking.com & Airbnb Channel Manager
Available nowKeeps reservations, availability and rates aligned between Keep it Simple Booking and your connected portals.
New and changed portal bookings appear in your KIS calendar. Availability, seasonal rates and minimum stays flow back through the official Channex connection.
One price per connected business or location; all accommodation synced there is included. Portal approval and the initial mapping are completed with us before the connection goes live.
Useful when the same holiday flats or rooms are sold directly and on Booking.com or Airbnb at the same time.
€79.90/month per business or locationBookable in your admin area
AI chat for guests
Available nowAnswers guest questions about prices, amenities and availability — around the clock, using the real data from your system.
It reads your live data on every single question: units, prices, minimum stay, house rules, events. Nothing to maintain twice — change a price today and it answers with the new one.
It never invents anything: what is not in your data, it says so and points to your phone number. It does not book — it guides guests to your booking form.
Worth it when the same questions keep coming in — wifi, dogs, directions, “anything free in August?”
Security & reliability
Your data deserves more than a promise.
Production runs on Hetzner servers in Germany. Hetzner is a German data centre and cloud provider certified to ISO/IEC 27001:2022; its cloud services also hold a BSI C5 Type 2 attestation.
No reputable provider can promise absolute security. We therefore rely on several layers of protection, tested changes and transparent limits. Read the privacy details
Still got a question?
We usually reply within 24 hours — but you don't need us to get started: you set the system up yourself.