21st

21st

21st.dev
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About

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.

About

​HeroUI is an AI-powered platform that enables users to generate production-ready React applications by simply providing prompts or screenshots. Built upon the open source HeroUI library, which boasts over 23,000 GitHub stars and 600,000 downloads, HeroUI combines design and code into a unified interface. Users can describe their desired UI, such as "responsive pricing page with three plans," and the platform will generate clean React code utilizing Tailwind CSS and HeroUI components. Features include manual code editing in developer mode, instant customization by selecting components and opening them in chat, and the creation of mobile-first layouts with clean semantics. HeroUI aims to streamline frontend development, allowing designers, developers, and founders to transition from concept to functional frontend code rapidly. ​

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

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

Audience

Designers and developers seeking a solution to expedite the creation of responsive React applications through AI-driven UI generation

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version
Free Trial

Pricing

Free
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

21st.dev
21st.dev/

Company Information

HeroUI
United States
heroui.chat/

Alternatives

Alternatives

Tempo

Tempo

Tempo Labs
ProtoUI

ProtoUI

ProtoUI

Categories

Categories

Integrations

React
Tailwind CSS
Figma
GitHub
shadcn/ui

Integrations

React
Tailwind CSS
Figma
GitHub
shadcn/ui
Claim 21st and update features and information
Claim 21st and update features and information
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