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Kalka vs OpenDesign
Both are open source and both produce HTML files on your machine. OpenDesign starts from a prompt. Kalka starts from a canvas, where you design by hand and call an agent when you want.
| Feature | OpenDesign | Kalka |
|---|---|---|
| Starting point | A prompt, a coding agent writes a prototype | A canvas with Figma's interface |
| Editing by hand | Move, resize, recolor after generation | Full design tool: layers, layout, styles |
| Open source | Yes, Apache-2.0 | Yes, MIT |
| Files | Local folder, HTML and CSS | Local folder, HTML, CSS and design tokens, Git ready |
| AI | Coding agents, your API key or hosted credits | Any MCP agent, optional |
| Status | Available, macOS and Windows | In development |
Choose OpenDesign if
- You want prototypes from a description, fast.
- You are not a designer and don't want to draw.
- You already work with a coding agent every day.
Choose Kalka if
- You are a designer and want control over every pixel.
- You want a real layers panel and design properties.
- You want agents as helpers, not as the only way in.
Prompt first or canvas first
OpenDesign presents itself as an open source alternative to Claude Design: you describe, the agent builds. Kalka is the other way round: you design, the agent assists. Both end with HTML you own, so the choice is about how you like to work.
Facts about OpenDesign come from open-design.ai and its pricing page, checked October 9, 2026. We build Kalka.