Hilton’s AI-Driven Energy-Cost Reduction Journey: Over $1 Billion Achieved in Savings

AI for Energy Reduction

Transforming Hilton's Global Utility Management

Hilton sought a software solution to measure, analyze, and manage utility consumption across its large global portfolio. In 2001, Hilton engaged ei3 to establish a comprehensive utility management platform, based on ei3’s IoT solutions. The resulting solution, LightStay, has since won numerous awards and is now mandatory for every Hilton property around the globe. This custom-built resource management solution uses AI to predict hotels’ energy, water, and waste usage and tracks actual consumption against these predictive models.

Any enterprise who wishes to monitor the use of resources can benefit from ei3’s capabilities in gathering, aggregating, and comparing operational data against modeled ideal usage to reduce cost and energy consumption while helping the environment.

About Hilton

In the nearly 100 years since its foundation, Hilton has established the global benchmark for excellence in hospitality. Today, Hilton maintains a diverse portfolio of 14 brands comprising nearly 5,400 properties in 106 countries.

LightStay Overview

LightStay turns energy management into a competitive challenge on a worldwide scale. Hilton hotels compare their energy consumption and share details about energy conservation projects that they execute.

At every instance, hotel management and staff can see how they are currently doing against their friends. And if they are falling behind, then can see what the other hotels are doing to beat them – and in this instance, copying is not only allowed but encouraged. When saving energy, there are no losers: everybody wins.

LightStay uses sophisticated mathematical models backed with artificial intelligence to continuously compare real-time operational data against complex models trained on historical information, and forecasts future energy consumption levels and evaluate operational efficiency.

Nurturing Sustainable Excellence


Automatic alerts are triggered when a hotel’s performance falls below the expected level. This proactive feature prompts swift remedial actions by the management, ensuring timely interventions to maintain optimal performance.


LightStay provides actionable insights, enabling hotel owners and management to monitor environmental and social impact across vital metrics—energy, carbon, water, waste, building, and property operations. The platform ensures instant visibility into improvement project outcomes, facilitating effective management. Results, both comprehensive and annually externally validated, serve as the bedrock for sustainability certifications.


Hotels can now assess the carbon footprint of various events, including meetings and conferences, extending beyond regular guest nights. With LightStay adopted by all Hilton properties globally, a fair and truly global comparison becomes possible. This widespread usage ensures standardized performance tracking for all hotels, fostering a commitment to sustainability on a worldwide scale.


US $1 Billion+

cumulative cost savings through AI-driven management of energy, water, and waste in LightStay since 2008 — verified by KEMA and DEKRA

30% Reduction

in carbon emissions and waste output

20% Reduction

in water consumption and energy use

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Read the case study for detailed insights into LightStay

Read the case study for detailed insights into LightStay