Audience

Software developers, startups, and product teams that want a fast and scalable way to build and deploy AI agents inside their applications

About 21st

21st is a developer platform that provides the fastest way to add AI agents directly into applications. The platform offers an SDK that allows developers to define, deploy, and run AI agents with minimal infrastructure setup. Developers can integrate agents using popular frameworks such as Next.js, React, TypeScript, Python, and Node.js. 21st includes built-in features like chat interfaces, session history, tool execution, memory, and real-time streaming responses. The platform also manages backend components such as sandboxed execution environments, authentication, rate limits, and observability. With support for Claude Code and Codex runtimes, developers can build agents that interact with tools, files, and APIs securely. By handling infrastructure and deployment automatically, 21st enables teams to launch production-ready AI agents quickly.

Pricing

Starting Price:
Free
Free Version:
Free Version available.

Integrations

Ratings/Reviews

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Company Information

21st.dev
21st.dev/

Videos and Screen Captures

21st Screenshot 1
Other Useful Business Software
$300 Free Credits to Build on Google Cloud Icon
$300 Free Credits to Build on Google Cloud

New customers can spin up VMs, build with AI, and query data at no cost.

Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
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Product Details

Platforms Supported
Cloud
Training
Documentation
Support
Online

21st Frequently Asked Questions

Q: What kinds of users and organization types does 21st work with?
21st works with these users and organization types: Mid Size Business, Small Business, Enterprise, Freelance, Nonprofit, Government, and Startup.
Q: What languages does 21st support in their product?
21st supports these languages: English.
Q: What kind of support options does 21st offer?
21st offers support via online.
Q: What other applications or services does 21st integrate with?
21st integrates with: Grok Bot, React, shadcn/ui, and Tailwind CSS.
Q: What type of training does 21st provide?
21st provides training in the form of documentation.
Q: How much does 21st cost?
Pricing for 21st starts at Free.

21st Product Features