kitio.ai21st.dev vs Onlook
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. 21st.dev starts at See pricing page and Onlook starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Component library
- Magic MCP server
- UI variation generation
- Agent-ready prompts
- shadcn compatibility
- Infinite canvas on live code
- Uses real components
- AI design edits
- Git integration
- Framework support
| Feature | 21st.dev | Onlook |
|---|---|---|
| Best for | UI component library and MCP tools for AI coding agents | Visual AI editor for designers working in real React code |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | 21st.dev | Onlook |
| Based in | – | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
21st.dev starts at See pricing page and Onlook starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Free
Free
- Browse the whole library
- 2 component copies a day
Builder
$8/mo billed quarterly
- Unlimited copies and installs
- Unlimited shaders and gradients
Builder + AI
$20/mo billed quarterly
- 500 AI credits/month
- Design Bug Bot PR reviews
- Premium AI models
Team
$10/seat/mo billed quarterly
- Per seat, 2 to 50 seats
- Shared collections
- Private team components
- Admin controls
2 plans
Free
Free
- Free, local-first desktop editor
- Open source
For Teams
Custom
- Shared project templates
- Branching and version control
- Centralized theming and branding
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
21st.dev
- Improves AI-generated UI quality
- Works with major coding agents
- Large free catalog
- React and Tailwind only
- Magic usage is paid
Onlook
- Design changes become real code
- No separate design system
- Open-source roots
- Needs an existing frontend repo
- Still a young product
Which one should you choose?
Choose 21st.dev if you want:
- Improves AI-generated UI quality
- Works with major coding agents
- Large free catalog
Watch out: react and tailwind only.
Choose Onlook if you want:
- Design changes become real code
- No separate design system
- Open-source roots
Watch out: needs an existing frontend repo.
21st.dev vs Onlook FAQ
What is the difference between 21st.dev and Onlook?
21st.dev: UI component library and MCP tools for AI coding agents. Onlook: Visual AI editor for designers working in real React code. Both are coding tools.
Is 21st.dev or Onlook cheaper?
21st.dev starts at See pricing page and Onlook starts at See pricing page. Check both pricing pages for current plans.
Do 21st.dev and Onlook have free plans?
21st.dev: Yes. Onlook: Yes.
Who makes 21st.dev?
21st.dev is made by 21st.dev.
Who makes Onlook?
Onlook is made by Onlook, based in United States.
Which should I choose, 21st.dev or Onlook?
Choose 21st.dev if you value improves ai-generated ui quality and works with major coding agents. Choose Onlook if you value design changes become real code and no separate design system.