kitio.aiJam vs 21st.dev
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Jam starts at $14/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
- One-click capture
- Console and network logs
- Jam AI reports
- MCP for agents
- Issue tracker integrations
- Component library
- Magic MCP server
- UI variation generation
- Agent-ready prompts
- shadcn compatibility
| Feature | Jam | 21st.dev |
|---|---|---|
| Best for | One-click bug reports with AI for people and coding agents | UI component library and MCP tools for AI coding agents |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | $14/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Jam | 21st.dev |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Jam starts at $14/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
2 plans
Free
Free
- 30 Jams per month
- 5 recording links
- Recordings up to 5 minutes
Team
$14/creator/mo billed yearly
- Per creator
- Unlimited Jams
- 150 recording links, 15-min recordings
- 200 AI summaries
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
Jam
- Saves time reproducing bugs
- Generous free plan
- Feeds context to agents
- Limited AI uses on free plan
- Best for web apps
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 Jam if you want:
- Saves time reproducing bugs
- Generous free plan
- Feeds context to agents
Watch out: limited ai uses on free plan.
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.
Jam vs 21st.dev FAQ
What is the difference between Jam and 21st.dev?
Jam: One-click bug reports with AI for people and coding agents. 21st.dev: UI component library and MCP tools for AI coding agents. Both are coding tools.
Is Jam or 21st.dev cheaper?
Jam starts at $14/mo and 21st.dev starts at See pricing page. Check both pricing pages for current plans.
Do Jam and 21st.dev have free plans?
Jam: Yes. 21st.dev: Yes.
Who makes Jam?
Jam is made by Jam, based in United States.
Who makes 21st.dev?
21st.dev is made by 21st.dev.
Which should I choose, Jam or 21st.dev?
Choose Jam if you value saves time reproducing bugs and generous free plan. Choose 21st.dev if you value improves ai-generated ui quality and works with major coding agents.