
Penpot
Penpot is an open-source UI design and prototyping platform with real-time collaboration, design systems support, and developer-friendly inspect mode with CSS/SVG/HTML output.

Penpot is an open-source web-based design and prototyping tool built to streamline collaboration between designers and developers. It supports creating UI designs, interactive prototypes, and scalable design systems, while providing developer-oriented inspection and code-oriented workflows.
Key Features
- UI design editor with reusable components and variants
- Interactive prototyping for flows and user journeys
- Design systems tooling, including native design tokens
- Inspect mode with SVG, CSS, and HTML information for implementation
- Real-time collaboration for teams, with solo workflows supported
- Plugin system to extend functionality and integrate with other tools
- Webhooks and API access via tokens for automation and integrations
Use Cases
- Product teams designing UI screens and maintaining shared component libraries
- Design-to-development handoff using inspectable SVG/CSS details
- Organizations hosting an internal design platform with controlled access and integrations
Limitations and Considerations
- Primarily focused on UI/UX design and prototyping; it is not a general-purpose vector illustration suite
Penpot is a strong choice for teams that want an open standards–friendly design tool and a more code-aware design workflow. Its collaboration features, inspect mode, and design-system primitives make it well suited for continuous product design and implementation.