kitio.aiContext7 vs 21st.dev
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Context7 starts at $10/mo and 21st.dev 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
- Version-aware docs
- MCP server
- Docs API
- Thousands of libraries
- Private docs on Pro
- Component library
- Magic MCP server
- UI variation generation
- Agent-ready prompts
- shadcn compatibility
| Feature | Context7 | 21st.dev |
|---|---|---|
| Best for | Up-to-date library docs for AI coding agents via MCP | UI component library and MCP tools for AI coding agents |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | $10/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Upstash | 21st.dev |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Context7 starts at $10/mo and 21st.dev starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 1,000 API calls per month
- Public repos
Pro
$10/mo
- Per seat
- 2,000 API calls per seat
- Private repos, team collaboration
- Extra calls $5 / 1,000
Enterprise
Custom
- Custom usage
- Self-hosted option
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
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
Context7
- Reduces hallucinated APIs
- Easy MCP setup
- Cheap Pro plan
- Free monthly cap
- Coverage varies by library
21st.dev
- Improves AI-generated UI quality
- Works with major coding agents
- Large free catalog
- React and Tailwind only
- Magic usage is paid
Which one should you choose?
Choose Context7 if you want:
- Reduces hallucinated APIs
- Easy MCP setup
- Cheap Pro plan
Watch out: free monthly cap.
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.
Context7 vs 21st.dev FAQ
What is the difference between Context7 and 21st.dev?
Context7: Up-to-date library docs for AI coding agents via MCP. 21st.dev: UI component library and MCP tools for AI coding agents. Both are coding tools.
Is Context7 or 21st.dev cheaper?
Context7 starts at $10/mo and 21st.dev starts at See pricing page. Check both pricing pages for current plans.
Do Context7 and 21st.dev have free plans?
Context7: Yes. 21st.dev: Yes.
Who makes Context7?
Context7 is made by Upstash, based in United States.
Who makes 21st.dev?
21st.dev is made by 21st.dev.
Which should I choose, Context7 or 21st.dev?
Choose Context7 if you value reduces hallucinated apis and easy mcp setup. Choose 21st.dev if you value improves ai-generated ui quality and works with major coding agents.