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21st.dev is a searchable React component catalog with agent, CLI and MCP install paths. It is not a runtime UI service: teams can bring component source into their own repos. Its listed pricing starts at $6 with a free plan, though one Reddit user reported an $8 monthly price and a limit of two copy actions per day. The alternatives below are coding agents, not replacement catalogs; they fit teams that want to adapt UI code in a repository.
01Why people leave 21st.dev
Free-tier copy limits
One Reddit user reported a two-copy-actions-per-day limit and an $8 monthly price. Check current pricing and limits before deciding.
More component sources
A Reddit user wanted copyable components from multiple sources, then planned to modify them with an AI coding tool.
Work directly in your repo
Teams that already have component source can use a coding agent to adapt it in their codebase instead of browsing a catalog.
02The alternatives, ranked by fit
- Best for scoped tasks
CursorCursorCursor suits developers delegating scoped implementation tasks who want editor and CLI workflows, plus code review through GitHub. Pricing starts at $8 with a free plan. Bring component source into your repo and ask Cursor to modify it; this replaces neither 21st.dev's catalog nor its discovery workflow. The product summary flags model costs and review work as costs to plan for.
Trade-off: Model costs and review work need attention; it is not a component catalog.
6.8/10from
$8/mofree plan - Best for existing repos
Claude CodeClaude CodeClaude Code fits developers working in existing repositories and teams automating issue-to-PR work or long refactors. Pricing starts at $17 with a free plan. Use it to adapt component code in your repo rather than relying on a catalog for discovery. The product summary flags subscription usage limits; ask the vendor about API access and expected usage before adopting it broadly.
Trade-off: Subscription usage limits need planning; it does not supply a component catalog.
7.5/10from
$17/mofree plan - Best for GitHub teams
GitHub CopilotGitHub CopilotGitHub Copilot is a fit for teams already using GitHub issues and pull requests that want agent sessions across surfaces and reviews inside GitHub. Pricing starts at $10 with a free plan. You can use an agent workflow to adapt component code in your repo, but it is not a searchable UI catalog. The product summary warns that usage credits and model limits change.
Trade-off: Track usage credits and changing model limits.
7.8/10from
$10/mofree plan - Best for shared workflows
AmpAmpAmp is aimed at developers running long-lived agent tasks and teams sharing agent threads and workflows. Pricing starts at $20 with a free plan. It can support a workflow where your team adapts component source in its repo, rather than using 21st.dev to find components. The product summary says integration and operating details need confirmation, so ask about API access and deployment boundaries first.
Trade-off: Confirm integration and operating details before committing.
7.1/10from
$20/mofree plan - Best for on-prem options
FactoryFactoryFactory targets teams standardizing coding-agent workflows and offers desktop, terminal, web and CLI entry points, model routing, and on-premise options. Pricing starts at $20 per month. It may fit teams adapting UI code inside a governed development workflow, but it is not a component source. Confirm which deployment and integration options meet your requirements.
Trade-off: Costs start at $20 per month; it does not replace component discovery.
7.0/10from
$20/mo - Best for spec-first work
KiroKiroKiro is an option for teams that want spec-first coding, particularly AWS-oriented developers using Terraform and CI workflows that review and fix pull requests. Pricing starts at $20 with a free plan. It offers a structured coding workflow for adapting code in a project, not a catalog of ready-to-copy React components. The product summary notes reported workflow and reliability frustrations.
Trade-off: Reported workflow and reliability frustrations warrant evaluation.
7.0/10from
$20/mofree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 21st.dev 21st.dev (current) | 7.0 | $6/mo | Yes | React teams using AI coding agents |
| Cursor Cursor | 6.8 | $8/mo | Yes | Developers delegating bounded coding tasks |
| Claude Code Claude Code | 7.5 | $17/mo | Yes | Developers working in existing repositories |
| GitHub Copilot GitHub Copilot | 7.8 | $10/mo | Yes | Teams already using GitHub issues and pull requests |
| Amp Amp | 7.1 | $20/mo | Yes | Developers who want persistent agents |
| Factory Factory | 7.0 | $20/mo | No | Engineering teams adopting coding agents |
| Kiro Kiro | 7.0 | $20/mo | Yes | Developers who work from written specs |
Questions people ask
Can these tools replace 21st.dev's component catalog?
No. These alternatives are coding agents, while 21st.dev is a searchable React component catalog with agent, CLI and MCP install paths. Choose one if your main need is to adapt component source in a repository. If you need a catalog for finding ready-to-copy patterns, these tools do not provide the same function.
Which alternative has the lowest listed starting price?
Among these picks, Cursor has the lowest listed starting price at $8, with a free plan. That is not a like-for-like price comparison with 21st.dev, which lists pricing from $6 and a free plan. Starting prices do not establish the cost of your usage; check current pricing and limits with each vendor.
How can I reduce lock-in when switching?
Keep component source in your own repository and avoid making the UI depend on a hosted runtime when that is not required. Before choosing an agent, ask the vendor about API and SDK access, data export, usage limits and applicable licence terms. Confirm deployment options too if you need self-hosting or on-premise operation.