Most independent hotels have guest data spread across three or four different systems that do not talk to each other. Their PMS holds booking history. Their email platform holds campaign engagement. Their front desk holds preferences captured during check-in. And none of it is connected. The result is generic marketing sent to every guest regardless of who they are, what they booked, or how many times they have stayed.
This guide covers how to build a connected guest data stack for independent hotels — integrating your PMS, CRM, and marketing tools to create a single view of every guest and use it to drive repeat bookings.
Most independent hotels need three core systems connected:
Property Management System (PMS): The source of truth for all booking data. Every stay, every room type, every rate, every length of stay, every ancillary spend. Common systems: Opera, Mews, Cloudbeds, Guestline, Little Hotelier, RoomRaccoon.
CRM: The system that builds individual guest profiles over time, combining booking history with communication preferences, loyalty status, and marketing engagement. Hospitality-specific CRMs include Revinate, Cendyn, Salesforce Hospitality Cloud, and Guestfolio. Some hotels use general-purpose CRMs (HubSpot, ActiveCampaign) with custom field structures.
Email Marketing Platform: The system that sends automated and campaign emails to segmented guest lists. Common choices: Revinate (built-in), Klaviyo, Mailchimp, ActiveCampaign, or the email module built into your CRM.
→ Example: A 65-room country house hotel implemented a PMS-CRM-Email integration and within 6 months had: automated pre-arrival emails for every booking, a post-stay review request sequence, a re-engagement campaign for guests who had not returned in 12 months, and a birthday offer series. Direct revenue from email campaigns increased by 41% in the first year.
Understanding what data flows where is the foundation of a good integration. Here is the standard data flow for a hotel guest data stack:
PMS → CRM: Booking confirmation data (check-in date, check-out date, room type, rate, booking value, booking source), guest profile data (name, email, phone, address, nationality), stay history (previous visits, lifetime value, preferred room type), and ancillary spend (F&B, spa, extras).
CRM → Email Platform: Segmented guest lists for targeted campaigns (by stay history, lead time, room type, spend level), automation triggers (post-stay, pre-arrival, birthday, anniversary, re-engagement), and personalisation variables (first name, last room type, last stay date).
Email Platform → CRM: Email engagement data (opens, clicks, unsubscribes), campaign conversion data (which email drove which booking), and opt-in/opt-out status for GDPR compliance.
Many PMS and CRM combinations have native, pre-built integrations. Check whether your PMS has a native connection to your CRM before building anything custom.
Examples: Mews has native integrations with Revinate, Cendyn, and several email platforms. Cloudbeds has native integrations with Revinate and Mailchimp. Little Hotelier has a native integration with their own CRM product.
Native integrations typically sync automatically on a scheduled basis (every 15 minutes to 24 hours) and require minimal technical configuration.
If your systems do not have native integrations but both have APIs, Zapier or Make (formerly Integromat) can connect them without writing code.
→ Example: A hotel using Guestline PMS and Mailchimp email connected the two using Zapier. Every time a booking was confirmed in Guestline, Zapier automatically added the guest to the correct Mailchimp audience segment based on room type and added their check-in date as a custom field. Pre-arrival emails then fired automatically 7 days before each arrival. Setup took 3 hours with no developer required.
For hotels with complex requirements or high booking volumes, a custom API integration provides the most control. This requires development resource but enables real-time data sync, custom field mapping, and complex business logic (e.g., calculating lifetime value, assigning loyalty tiers, triggering different sequences by booking source).
Guest data used for marketing requires a valid legal basis under GDPR. For hotel marketing, this is typically either consent (guest opted in to marketing communications) or legitimate interests (for existing customers in the context of similar services).
Ensure your PMS captures marketing opt-in status at booking and passes it to your CRM and email platform. Never import guest email addresses into marketing platforms without a valid opt-in or legitimate interest assessment. Keep a record of when and how consent was obtained.
Your email platform should handle unsubscribes automatically and sync that opt-out status back to your CRM and PMS. A guest who unsubscribes from one system should be suppressed in all systems.
The Lobby designs and implements CRM integration stacks for independent hotels.
