EcoTwin AI · Urban design and energy simulation
EcoTwin AI builds Eco Digital Twin Sandbox, a browser workspace for architects, planners, and engineers. Model buildings and landscapes in 3D, assign real surface properties, and prepare for industry-grade microclimate and energy analysis.
Purpose
EcoTwin AI is a specialized company focused on software for urban design and energy simulation. We build tools that help architects, planners, and engineers shape more sustainable cities — from early massing to performance-ready digital twins.
For architects, urban planners, energy and sustainability consultants, researchers, municipalities, and engineering teams working on buildings and neighborhoods.
Design and edit in one workspace. Analysis joins that same model as simulation rolls out.
Intuitive 3D editing for project work, not a pipeline that only a research script can drive.
Surface types, layers, and project packages prepared for industry-grade engines.
Open the workspace in a browser. No heavy local install to get a model started.
Product
The sandbox brings urban modeling into a single browser-based workspace. Design and edit the built environment in 3D, assign surface and material properties, and prepare models for rigorous analysis — without chaining together disconnected desktop tools.
Massing, landscape, and map context in a live 3D scene.
Surface types, layers, and material properties the analysis can read.
CDT and EcoFile packages, ready for the simulations now rolling out.
Capabilities
This is the live workspace at app.ecotwinai.com. In-app simulation runs are not open to every user yet — those are under Roadmap.
01 — Model
A real-time 3D scene with a grid, lighting, soft shadows, and camera controls. Draw rectangles, circles, polygons, linear paths, and spheres. Add buildings — including generators and merge — plus trees, furniture, and terrain. Select, move, rotate, scale, and duplicate, with undo and redo. Edit meshes, snap to vertices, and measure, with an object list and properties panel beside the model.
02 — Surfaces
The Types manager holds catalogs for plants, soils, water, roads, buildings, optical materials, carbon emission factors, PV parameters, and generic surfaces, aligned with CDT-UBEM-style data packages. Stack surface layers and assign materials so the twin is prepared for simulation, not only for a picture.
03 — Map
Map Bridge lets you pick an area and load urban features into the scene. The default path brings buildings from OpenStreetMap and Overture, with heights where those sources provide them. Models can store georeferencing, and GeoJSON can be imported.
04 — Files
.CDT (CityDigTwin) is the primary project package. .ecofile carries the scene and settings for simulation pipelines. Export meshes, or bring existing geometry and catalogs in.
05 — Access
Register and sign in with email and password. Google and Microsoft sign-in are available when they are configured, along with password reset and email verification. Where guest mode is turned on, you can look around before subscribing. Plans run through Stripe Checkout. An active subscription keeps Save and Export available. Card details stay with Stripe, not on EcoTwin servers.
How it works
Model and surface assignment are in the app now. The third step is the simulation release currently rolling out.
Step 1 · Available
Draw the neighborhood, or pull buildings in from the map. Edit the massing until the scheme is the one you mean to test.
Step 2 · Available
Give roofs, walls, ground, and landscape the properties an energy or microclimate study expects. Export a CDT or EcoFile when the model is ready.
Step 3 · Rolling out
PALM microclimate and EnergyPlus runs, with results back in the scene, so a design change can be judged on performance. The Simulation menu is opening for subscribers shortly. It is not yet available to every user.
Coming soon
Capabilities already in our stack, rolling out to users shortly: PALM microclimate, EnergyPlus building energy, in-scene results, scenario comparison, and expanded carbon workflows.
PALM-based simulation from the twin, for the heat and wind of streets, courts, and roofscapes.
EnergyPlus on the same model — from scene buildings, or from an uploaded IDF and weather file.
Read performance back on the model you edited, instead of in a separate viewer.
Hold design alternatives next to each other and see which one performs.
A wider path from surface properties and emission factors into the decisions those numbers are for.
Public enablement of the in-app Simulation menu once the runs are ready for general use.
On the roadmap, not in the product today.
Pricing
Nothing is sold on this website. Subscriptions use Stripe Checkout inside Eco Digital Twin Sandbox. These are the individual prices available today, in USD.
$10 USD
Billed weekly
$35 USD
Billed monthly
$100 USD
Billed quarterly
$350 USD
Billed yearly
Save and Export stay available on an active plan. You can also open the sandbox first, or watch a tutorial (opens in a new tab) before you subscribe.
Questions
EcoTwin AI is a company that builds software for urban design and energy simulation. The work is for architects, planners, and engineers who need more sustainable cities, from early massing to a digital twin that is ready for performance analysis.
Eco Digital Twin Sandbox is the browser app at app.ecotwinai.com. It is one workspace for 3D urban modeling, surface and material assignment, map import, and project files. This website explains the company. It is not the editor.
Architects, urban planners, energy and sustainability consultants, researchers, municipalities, and engineering teams working on buildings and neighborhoods.
You can model in 3D, assign surface types and layers, bring buildings in from OpenStreetMap and Overture through Map Bridge, and save or export .CDT, .ecofile, STL, OBJ, GLB, FBX, and GeoJSON. Accounts, sign-in, and Stripe subscriptions are live. Save and Export need an active plan.
Not as a general release. PALM microclimate, EnergyPlus building energy, in-scene results, and scenario comparison are in the stack and rolling out. The Simulation menu is not yet available to every user.
Use the contact form on this page. It asks for your email and a message, and delivers that note to EcoTwin AI. You can also write to support@ecotwinai.com.
Individual plans, in US dollars, are weekly $10, monthly $35, quarterly $100, and yearly $350. Billing happens in the app through Stripe Checkout. This site does not take payment. Subscribe in the app.
Contact
Leave your email and a note. We read messages sent from this page at EcoTwin AI.
Open the workspace
Model the massing, assign its surfaces, and keep the file ready for the simulations now rolling out.