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Launch HN: Adam (YC W25) – Open-Source AI CAD

Adam, a Y Combinator W25 startup, launched CADAM, an open-source AI-powered CAD tool that generates parametric 3D models from natural language or images in a browser. The tool exports to STL, SCAD, and DXF formats and includes libraries like BOSL and MCAD, enabling rapid design iteration.

read3 min views1 publishedJun 17, 2026

👉 adam.new/cadam. Generate a CAD model in seconds, right in your browser. No install required.

  • 🤖 AI-Powered Generation- Transform natural language and images into 3D models - 🎛️ Parametric Controls- Interactive sliders for instant dimension adjustments - 📦 Multiple Export Formats- Export as .STL, .SCAD, or .DXF files - 🌐 Browser-Based- Runs entirely in your browser using WebAssembly - 📚 Library Support- Includes BOSL, BOSL2, and MCAD libraries
Feature Description
Natural Language Input
Describe your 3D model in plain English
Image References
Upload images to guide model generation
Real-time Preview
See your model update instantly with Three.js
Parameter Extraction
Automatically identifies adjustable dimensions
Smart Updates
Efficient parameter changes without AI re-generation
Custom Fonts
Built-in Geist font support for text in models

A showcase of what CADAM builds from a single plain-language description — from full multi-part machines down to clean parametric parts. Each model below started from the prompt shown and came out as fully parametric OpenSCAD, ready to export as .STL

, .SCAD

, or .DXF

. The source and a short write-up for each live in benchmarks/; the orbiting previews are rendered with

.

benchmarks/render.sh

Model Prompt Controls Output
V8 engine

8 colors

9-cylinder radial aircraft engine 6 colors

Turbofan jet engine 10 colors

Axial turbine blisk 1 color

Model Prompt Controls Output
Twisted hexagonal vase

1 color

Knurled control knob 2 colors

Hex bolt & nut — real threads 2 colors

Honeycomb lightweight bracket 1 color

NACA 2412 tapered wing 1 color

Threaded jar & screw-on lid 2 colors

Right-angle bevel gear drive 3 colors

Centrifugal pump impeller 1 color

Herringbone planetary gear stage 4 colors

git clone https://github.com/Adam-CAD/CADAM.git
cd CADAM

npm install

npx supabase start
npx supabase functions serve --no-verify-jwt

npm run dev
  • Node.js ^20.19.0 or >=22.12.0, with npm 10+

  • Supabase CLI

  • ngrok (for local webhook development)

  • Copy .env.local.template

to.env.local

  • Update all required keys in .env.local

:

VITE_SUPABASE_ANON_KEY="<Test Anon Key>"
VITE_SUPABASE_URL='http://127.0.0.1:54321'
  • Add server-side keys to .env.local

, including:

ANTHROPIC_API_KEY="<Test Anthropic API Key>"
OPENROUTER_API_KEY="<Test OpenRouter API Key>"
OPENAI_API_KEY="<Test OpenAI API Key>"
GOOGLE_API_KEY="<Test Google API Key>"
FAL_KEY="<Test FAL API Key>"
SUPABASE_SERVICE_ROLE_KEY="<Test Service Role Key>"
BILLING_SERVICE_URL="<Test Billing Service URL>"
BILLING_SERVICE_KEY="<Test Billing Service Key>"
ENVIRONMENT="local"
ADAM_URL="<Adam URL or dev URL>" # Checkout and portal redirect target
WEBHOOK_BASE_URL="<Public TanStack App URL>" # Your app URL for /cadam/api callbacks
NGROK_URL="<NGROK URL>" # Optional local Supabase Storage tunnel for provider-readable signed URLs

CADAM uses public URLs for provider callbacks and local signed storage URLs:

Install ngrok if you haven't already:

npm install -g ngrok
brew install ngrok

Start an ngrok tunnel pointing to your TanStack Start dev server:

ngrok http 3000

Copy the generated ngrok URL (e.g.,

https://xxxx-xx-xx-xxx-xx.ngrok.io) and add it to your.env.local

file:

WEBHOOK_BASE_URL="https://xxxx-xx-xx-xxx-xx.ngrok.io"

If a provider must fetch local Supabase Storage signed URLs, run a second tunnel to Supabase and set

NGROK_URL

to that URL. - Ensure

ENVIRONMENT="local"

is set in the same file.

npm i
npx supabase start
npm run dev

Frontend: React 19 + TypeScript + TanStack Start + Vite3D Rendering: Three.js + React Three FiberCAD Engine: OpenSCAD WebAssemblyBackend: TanStack Start server routes + Supabase PostgreSQL/Auth/StorageAI: Anthropic Claude APIStyling: Tailwind CSS + shadcn/uiLibraries: BOSL, BOSL2, MCAD

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also open an issue.

See the CONTRIBUTING.md for instructions and code of conduct.

This app wouldn't be possible without the work of:

This distribution is licensed under the GNU General Public License v3.0 (GPLv3). See LICENSE

.

Components and attributions:

  • Portions of this project are derived from openscad-web-gui

(GPLv3). - This distribution includes unmodified binaries from OpenSCAD WASM under GPL v2 or later; distributed here under GPLv3 as part of the combined work. See src/vendor/openscad-wasm/SOURCE-OFFER.txt

.

Live chart by RepoStars — click for the interactive version.

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