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Energy & Carbon Intelligence for Digital + AI

Hiili is the carbon data platform for digital energy measurement.

Scientific methodology to measure, optimize, and report energy use and CO₂ across digital products and AI.

Cut costs, increase performance, and strengthen ESG reporting with measurable impact.

Why now?

Most companies lack a granular view of energy/CO₂ across their digital stack. GenAI adds new cost and emission layers. ESG reporting expectations demand measurable, auditable impact.

Complete product portfolio

Five products covering your entire digital ecosystem

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GreenBrain AI

Smart routing across LLMs

Intelligent routing across 100+ GenAI models to minimize cost and carbon while preserving quality. Routes to OpenAI, Anthropic, Gemini, Mistral, DeepSeek, Llama, and more.

• Lower emissions per prompt
• Up to 80% cost reduction

Try Free →

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CarbonAd

Advertising carbon measurement

Measure and optimize emissions across advertising supply chains. Prove KPIs ↑, Cost ↓, CO₂ ↓ for campaigns and media.

For: Advertisers, agencies, publishers

Preview platform →

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CarbonWeb

Website footprint reports

Website carbon footprint measurement plus optimization insights. Fast audit reports, certification, and enterprise rollout.

For: Companies, public entities, NPOs

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CarbonApp

Mobile app measurement

Mobile application footprint tracking via SDK integration. Measure, benchmark, and scale across your app portfolio.

For: App developers, product teams

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CarbonDesktop

Desktop application tracking

Desktop application footprint measurement. Quantify employee tooling energy use for IT and sustainability teams.

For: Enterprises (IT/sustainability)

It started in the lab

Hiili is a joint venture between Universidad Carlos III de Madrid and veterans from media and advertising industries. Read the publication that started it all here.

A company six years in the making

Since 2018 Hiili's research has been featured and quoted across countless outlets and newspapers. In 2024 Hiili was officially launched as a spin-off venture, to further develop its first-generation carbon data platform.

Meet the team

MEET THE TEAM

Dr. Rubén Cuevas

CEO and CoFounder

One of the most renowned researchers in adtech, pioneering sustainability within the area. His research in adtech has been featured in some of the world's biggest outlets, including The Financial Times, BBC, The Guardian, New York Times, etc.

Dr. Ángel Cuevas

CTO and CoFounder

Award-winning researcher and co-author of more than 70 papers. He is acknowledged worldwide as one of the leaders within measurement and transparency in advertising. His work has been featured in more than 200 news outlets including Financial Times, Le Figaro, The Sunday Times, New Scientist, El País, etc.

Álvaro del Castillo

Chairman

Entrepreneur and digital media innovator constantly looking for common sense solutions to solve everyday problems. Focussed on digital media plus ad technology since 1998 and passionate about the opportunities that seamless connectivity offers. Specialties: Starting up. Questioning why.

Pedro Travesedo

BD & Partnerships Director

Helping brands grow responsibly by combining technology, data, and purpose. With more than 20 years of international experience in digital marketing, adtech, retailtech, and strategic partnership.

Mikko Kotila

CDO

Founder of one of the world’s first digital agencies and a renowned innovator and researcher in the online advertising ecosystem. He has authored multiple WFA guidebooks, and co-founded I-COM’s Data Science Board and their Blockchain Committee.

Hiili S.L.

📍 Av. Gregorio Peces Barba, 1, Leganes, Madrid, 28919, ES

✉️ hello@hiili.org

☎️ +34916245703