Sustainability operating system · Hospitality
Stop reporting.
Start measuring.
DIEZ is the sustainability operating system built for hotels facing real commercial pressure — from Booking.com's Travel Sustainable program, tour operator audits, and EU regulation arriving in 2026. Measure your property in 1–2 days. Get scores, a carbon footprint, and an action plan you can actually defend.
From €149 / month · Cancel any time
— Why it pays
You're not buying sustainability.
You're buying three returns.
It costs about 0.3% of your room rate. Here's what it pays back.
Guests and bookers choose you
More direct bookings, less paid to OTAs. Corporate and event clients increasingly demand sustainability proof — no proof, no contract.
The plan pays for itself
Measuring energy, water and waste finds where money leaks. Most fixes cut bills — savings often cover the cost.
Worth more when you sell
Banks, insurers and buyers now want audit-ready proof. Having it protects your valuation and financing terms.
From September 2026, EU law bans "carbon neutral" and loose "eco / green" claims without certified proof — and it's already being enforced in court. A cheap offset and a green sticker now buy you legal risk, not marketing. DIEZ keeps you on the right side of it.
The cheap carbon credit is the expensive one — it becomes a liability.
DIEZ helps you cut what you can, buy only credits that hold up for the rest, and prove all of it. The proof is the product.
— The pressure is real
Three forces converging on your property.
Booking.com Travel Sustainable
Properties without a recognized certification or methodology-backed sustainability program risk derangement in Booking's Travel Sustainable filter — increasingly the default for the European market.
Tour operator contracts
French, German, and UK tour operators are adding sustainability evidence requirements to 2026 contracts. Properties that can't substantiate their claims are being dropped from negotiation lists.
EU regulation from 2026
The Empowering Consumers for the Green Transition Directive applies from September 2026, making unsubstantiated 'sustainable,' 'eco-friendly,' or 'carbon neutral' claims legally challengeable — without anyone needing to prove consumer harm. Most current sustainability platforms produce claims that don't survive this scrutiny.
— The DIEZ journey
Three tiers. Start where you are.
Pulse
Measure your starting position
1–2 days · Self-completed
or €1,250 / year · Cancel any time
- —Score across 10 hospitality dimensions
- —Pulse Carbon Footprint with HCMI methodology
- —Pulse Action Plan with specific reduction opportunities
- —Pulse-tier reports for internal review and prospect communication
Detailed Assessment
Move from indicative to verified
4–8 weeks · With DIEZ team
Includes Pulse · DIEZ tier
- —Document-backed inputs and audit-ready measurements
- —Verified emission factors and full calculation trace
- —CSRD-aligned reports
- —Tour operator audit response packs
- —Defensible substantiation under EU Green Claims Directive
— See the product
What you'll actually use.
01 · Sustainability Dashboard
One screen. Where you stand, and what to do next.
Your overall Pulse score, your live carbon footprint, your property profile completeness, and your active modules — all in a single, editorial control panel built for hotel operators, not ESG consultants.
02 · Measure — Pulse footprint
Your carbon footprint, calculated honestly.
Ten HCMI-aligned questions. Scope 1, 2 and 3 with a live confidence range and per-guest-night intensity benchmarked against your real peer group. Every number traceable to its input — and ready to upgrade to an audit-ready DIEZ Assessment when you are.
03 · Progress over time
Locked runs. A trajectory you can defend.
Each Pulse you complete is a quiet checkpoint — locked, dated, traceable. Watch your score climb and your tCO₂e fall, quarter by quarter, across all ten dimensions. The evidence trail Booking, tour operators and EU regulators will ask for.
04 · Passport — public proof
Your story, substantiated. Public URL and QR.
A shareable Passport showing where your linens, food and amenities actually come from — supplier names, distance, certifications. Drop the QR on a menu, in a room, on a contract. Not a green badge — evidence your guests and buyers can verify themselves.
05 · Multi-property
One organization. Every property, side by side.
Run a single boutique riad or a portfolio of hotels across markets. See profile completeness and audit year per property at a glance, jump into any one in a click — same methodology, same scoring, no spreadsheets between you and the answer.
— Why DIEZ is different
Three principles we don't compromise on.
Inputs, not vibes
Every score traces back to a number, a document, and a person who entered it. When a journalist or a regulator asks how you got there, you have the answer.
Built for the regulation arriving next
EU Green Claims Directive (2027), CSRD, Empowering Consumers Directive. DIEZ is designed for what's coming, not what platforms have grandfathered from a decade ago. The methodology will hold up.
Hospitality-specific, not generic
HCMI methodology for carbon. Hospitality-specific supply chain dimensions. Pulse questions written for hotel operations, not generic ESG checklists. Built by people who understand the difference between a riad and a resort.
— Built on standards you already trust
DIEZ is built on the standards your auditor, your regulator, and your guests already recognize. We don't invent alternatives — we make the recognized methodology actually usable.
— Pricing, in one line
Pulse €149/mo (or €1,250/yr). DIEZ €4,999/yr. Executive Support €250/hr. Per property. Cancel any time.
Start with your Pulse.
€149 per month, per property. Complete the Pulse in 1–2 days and get your scores, your carbon footprint, and your action plan. Month-to-month — cancel any time if it isn't useful.
Multiple properties? Group of hotels? Talk to the DIEZ team →