We stay as your guests, and report as your inspectors.
Request a proposalDiscreet mystery audits and brand standards assessments for luxury hotels in more than 100 countries, with the standards, training and software that help your teams close every gap.
- Brands served
- 90+
- Countries
- 100+
- Inspectors
- 400+
- Languages
- 37
- Properties assessed every year
- 1,000+
Chosen by leading hotel brands
A selection of the hotel groups and brands that work with GDI.
How an audit works
An inspector books and stays like any other guest, and assesses every moment of the stay against your own standards.
- Reservation
- Telephone enquiry
- Arrival & check-in
- Guest room
- Housekeeping
- Dining & room service
- Spa & wellness
- Concierge
- Service recovery
- Check-out & billing
Agree what to measure
We build the assessment around your brand standards, your property and the questions you need answered.
Stay unannounced
A trained inspector visits as an ordinary guest. Your teams never know an audit is under way.
Receive the report
Every touchpoint is scored against your standards, with clear evidence and recommendations.
Close the gaps
Standards, SOPs, training and our software turn the findings into lasting improvement.
One partner, from audit to improvement
Each service stands on its own, and they are designed to work together.

Mystery audits
The complete guest journey, from the first enquiry to departure, measured against your brand standards.

Back of house & announced brand standards audits
The areas guests never see, from kitchens and engineering to security and statutory records.

Brand standards & SOP development
Written, pictorial and video standards, so every team member knows what excellence looks like.

Training
On-property programmes and our Training LMS, aimed at the gaps your audits reveal.

Software services
One platform for SOPs and brand standards, assessments, self-inspections and training, with mobile apps and custom dashboards.

Why hotel groups choose GDI
Independent and discreet
You see the service your guests actually receive, not a performance for an inspector.
Inspectors from luxury hospitality
400+ inspectors of 38 nationalities, with more than 100 years of combined experience in luxury hotels.
Local knowledge, worldwide
Assessments in more than 100 countries and 37 languages, aware of local culture and regulation.
Your standards, not a template
Every programme is built around your brand, from a single property to a whole portfolio.
Flexible, without long contracts
A single audit or an ongoing programme, whenever you need it.
Brand and national standards
From brand standards to hotel classification and quality certification audits.
Tell us about your hotel or portfolio
Share your properties, locations and what you would like to measure, and we will send you a proposal shaped around your brand standards.
Request a proposal













