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Subframe

Subframe is the UI design tool for the AI era.

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  • Free plan available
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What is Subframe?

Subframe is a UI design tool built specifically for teams working with AI-powered applications. It lets designers create, prototype, and handoff interface designs with consideration for how AI components and dynamic content behave within applications. The tool focuses on bridging the gap between design and development, particularly for interfaces that incorporate AI features like language models, generative content, and real-time data updates. The platform serves product designers, design systems teams, and developers who need to design interfaces that work alongside AI functionality. Rather than treating AI as an afterthought in design, Subframe positions UI design as central to the AI application workflow. It offers a freemium model, making it accessible for teams starting out whilst providing paid options for larger organisations.

Key features

Component library

Pre-built UI components designed specifically for AI applications, including input fields for prompts, output displays, and loading states

Design-to-code handoff

Export designs with code that integrates AI patterns and structures

Real-time collaboration

Work with team members simultaneously on design files

Responsive design tools

Build interfaces that adapt across different screen sizes and AI content lengths

Interactive prototyping

Create clickable prototypes to test how AI features feel in context

Token-aware design

Tools to visualise and plan for variable content lengths from AI responses

Pros & cons

Advantages

  • Purpose-built for AI UX patterns rather than generic design software adapted for AI work
  • Strong focus on the design-to-development handoff, reducing friction between teams
  • Freemium pricing makes it possible to evaluate before committing budget
  • Collaborative features let distributed teams work together in real time

Limitations

  • Relatively new tool with a smaller ecosystem compared to established design platforms
  • Learning curve for teams accustomed to traditional UI design tools without AI-specific features
  • Limited third-party integrations compared to mature design software

Use cases

Designing chatbot and conversational AI interfaces with proper state handling for loading and responses

Building product UI for generative AI tools like image generators or content creation software

Creating design systems that account for dynamic, variable-length content from AI outputs

Prototyping how AI features integrate into existing application interfaces

Collaborating on design documentation for AI application features across product teams

Ready to try Subframe?

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Pricing

Free

Free

Basic design and prototyping capabilities, limited file storage, community support

Pro

Contact for pricing

Advanced collaboration tools, increased file storage, team management, priority support

Get started with Subframe

Click through to Subframe and start using it now.

Try Subframe free
  • Free plan available
  • No credit card