See your city with a new eye.

CLARA delivers automated, high-resolution, physics-based environmental digital twins to power urban resilience.

Air quality
Wind
Temperature
How CLARA works Try CLARA
Live in Brussels since Sep 2025
1 m spatial resolution
Near real-time and forecasting
CLARA app
CLARA-app
clara.city
CLARA-web
CLARA-web
Smart City Real Estate News HoReCa CLARA API { wind, air, temp }
CLARA APIs
What CLARA is

A set of methods, models and software that generates and runs urban digital twins, automatically.

Starting from a 3D model of a city, CLARA ingests live data from Earth observation, ground sensors and weather forecasting services into its urban physics simulator based on Computational Fluid Dynamics and accelerated with AI to deliver fast, accurate and robust digital twins of the urban environment.

How it works

From city geometry to live insight.

Continuously running. End-to-end automated.

3D city model

Buildings, terrain, streets

Live data ingestion

Earth observation · Ground sensors · Weather forecasts

CFD + AI urban physics simulator

Physics + ML · near real-time and forecasting

Wind

Air

Temperature

Three ways to deliver the twin

One engine. Three channels.

CLARA data flows where it's needed — to citizens, administrations and other platforms.

CLARA-app

Live location-based alerts, hourly forecasts, statistics.

  • Per-location alerts and statistics
  • Real-time & forecast maps
  • Interactive 3D explore-map
Public release · June 2026 · Free

CLARA-web

A web platform built for local administrations.

  • City-wide environmental dashboards
  • Historical & forecast layers
  • Operational decision support

First application

BrusAir — developed for the City of Brussels and live since September 2025, providing high-resolution air quality data to city administrators and citizens.

brusair.be
Release · September 2026

CLARA APIs

Stream high-resolution environmental data straight into smart-city, real-estate, news, HORECA and other data platforms.

  • Real-time + forecast endpoints
  • Point, area & raster queries
  • Enterprise SLA & secure auth
Available now
Explore CLARA

Environmental intelligence at your fingertips.

A glimpse of the CLARA-app. Currently in testing, free for everyone in June 2026.

CLARA App Screenshot 1
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CLARA App Screenshot 3
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CLARA App Screenshot 7

Swipe to explore

Actionable insights

Use Cases

This video was produced with the assistance of AI tools.

Safe Route

The Cyclist

Everyday Sara commutes from home to work using her bike. Weather conditions can be harsh in Brussels and wind conditions dangerous.

CLARA shows me exactly which streets are shielded from the wind. I can ride home safely!

This video was produced with the assistance of AI tools.

Smarter real estate

The Home Buyer

CLARA uncovers invisible air quality and microclimate risks, giving you a clear picture of a property's true long-term value.

The agent said it was a great location. I checked CLARA and saw the balcony sits right in a pollution hotspot. We saved ourselves from a bad investment.

This video was produced with the assistance of AI tools.

Operational efficiency & safety

The Restaurant Manager

Adam uses CLARA to optimize staffing levels and stay ahead of weather risks, ensuring a safe and comfortable experience on the terrace.

If the app predicts high wind on our street at 19:00, I cancel the extra waiters. I also get alerts to close the parasols before a gust hits. It saves me money and protects my clients.

This video was produced with the assistance of AI tools.

Healthy living

The School

In her classroom, everyday Olivia used to guess when to open the windows. With CLARA, she can see exactly when the air outside is clean.

I ventilate at the right moment and keep my pupils safe from traffic pollution.

Scientific Transparency

Validation

Our physics + AI engine has undergone rigorous validation against measurements and reference solutions to ensure the highest standards of accuracy for urban micro-climate modeling.

Access Validation Report (PDF)
Validation Report Preview

Validation CLARA

Release 2026

92%

Average
Accuracy

Roadmap

From Brussels to every city.

Shipped · September 2025

BrusAir goes live

First application of CLARA technology, developed for the City of Brussels, providing high-resolution air quality data to administrators and citizens.

brusair.be
June 2026

CLARA-app · public release

Currently in testing. Releasing to the general public, entirely free of charge, in June 2026.

Now in private testing
September 2026

CLARA-web · launch

Web-based platform for local administrations. City-scale dashboards, decision support and analytics.

What's next

Beyond the digital twin.

Capabilities currently in development.

Under development

UMAT

Urban Microclimate Adaptation Tool

Test urban adaptation strategies (greening, materials, shading) and assess renewable energy potential.

Under development

CURA

City Urban Resilience Assistant

AI-powered assistant that helps users navigate CLARA's high-resolution environmental data, turning it into operational decisions and actionable reports.

Under development

CLARA Shield

Disaster and dual-use applications

High-resolution environmental prediction for emergency response, civil protection and dual-use scenarios.

Contact us

Try CLARA, today.

info@clara.city