kitio.aiCircleCI vs 21st.dev
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. CircleCI starts at $15/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
- Cloud CI/CD pipelines
- GitHub, GitLab and Bitbucket support
- Chunk MCP server
- Autoscaling runners
- Release orchestration
- Security and compliance
- Component library
- Magic MCP server
- UI variation generation
- Agent-ready prompts
- shadcn compatibility
| Feature | CircleCI | 21st.dev |
|---|---|---|
| Best for | CI/CD platform that validates AI-written code with automation | UI component library and MCP tools for AI coding agents |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | $15/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | CircleCI | 21st.dev |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
CircleCI starts at $15/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
- Up to 6,000 build minutes
- Up to 5 active users
- No credit card needed
Performance
$15/mo
- 30,000 credits included
- 5 active users
- Larger resource classes
- Extra users $15 each
Scale
Custom
- Higher concurrency and limits
- More network included
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
CircleCI
- Free plan with 6,000 build minutes
- Works with major code hosts
- Pay for what you use on Performance
- Credit pricing is hard to forecast
- Extra users cost $15 per month each
- AI features are secondary to the CI core
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 CircleCI if you want:
- Free plan with 6,000 build minutes
- Works with major code hosts
- Pay for what you use on Performance
Watch out: credit pricing is hard to forecast.
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.
CircleCI vs 21st.dev FAQ
What is the difference between CircleCI and 21st.dev?
CircleCI: CI/CD platform that validates AI-written code with automation. 21st.dev: UI component library and MCP tools for AI coding agents. Both are coding tools.
Is CircleCI or 21st.dev cheaper?
CircleCI starts at $15/mo and 21st.dev starts at See pricing page. Check both pricing pages for current plans.
Do CircleCI and 21st.dev have free plans?
CircleCI: Yes. 21st.dev: Yes.
Who makes CircleCI?
CircleCI is made by CircleCI, based in United States.
Who makes 21st.dev?
21st.dev is made by 21st.dev.
Which should I choose, CircleCI or 21st.dev?
Choose CircleCI if you value free plan with 6,000 build minutes and works with major code hosts. Choose 21st.dev if you value improves ai-generated ui quality and works with major coding agents.