Uiverse.io
Website & App Development
Community-made library of free and customizable UI elements for developers.
- UI Elements
- Free Components
- Tailwind
Free
Best onUI Alternatives in 2026
onUI: Annotate and draw web UIs for AI agents, export structured context without code changes. Here are 12 alternatives — compare pricing, free plans and API access side by side.
onUI vs. alternatives
| Tool | Category | Pricing | Starting at | Free plan | API | Open source |
|---|---|---|---|---|---|---|
| Website & App Development | Free | — | |||
| Website & App Development | Free | — | |||
 | Website & App Development | — | — | |||
 | Website & App Development | — | — | |||
 | Website & App Development | Freemium | — | |||
 | Website & App Development | Freemium | — | |||
 | Website & App Development | Paid | — | |||
 | Website & App Development | Free | — | |||
 | Website & App Development | Free | — | |||
 | Website & App Development | Freemium | $15/month | |||
 | Website & App Development | — | — | |||
 | Website & App Development | Free | — | |||
 | Website & App Development | — | — |
Top onUI alternatives
Balsa UI
Website & App Development
Agent-native, open-code component system for Vue 3
Handle
Website & App Development
Designs UI directly in production code with visual tools
- Design Handoff
MiroMiro
Website & App Development
Converts website UI into Tailwind, React, or Vue code with assets
- UI Component Extraction
- Design Tokens
- CSS Extraction
Freemium
Radar
Website & App Development
Open-source Kubernetes UI with AI agents for diagnostics and topology tracing.
- AI Investigations
- GitOps Visibility
- Helm Chart Visibility
Freemium
Thesys
Website & App Development
Builds dynamic, real-time UIs with C1 Generative UI API
- Generative UI
- AI User Interface
- Interactive UI
Paid
Forge
Website & App Development
Modern React component library with 100+ UI components, themes, and AI integration.
- UI Kit
- Design System
- TypeScript
Free
Tailgrids
Website & App Development
Open-source React component library with Tailwind CSS for faster app development.
- Tailwind CSS
- React Framework
- UI Components
Free
Flowstep
Website & App Development
Generates multi-screen UI from prompts, edits via chat or manually, and exports to Figma or code.
Freemium
Lunagraph
Website & App Development
Designs and creates UI with real HTML, CSS, and React code.
- UI Design
- Code Generation
- React
Qursor
Website & App Development
Inspects websites visually to copy structured code context for AI coding assistants.
- UI Components
- Visual Inspection
- AI Handoff
Free
Progress AI Observability
Website & App Development
Build web, mobile, and desktop apps with .NET UI components and JavaScript libraries.