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What is Bun?

Bun serves as an all-in-one toolkit for JavaScript, TypeScript, and JSX, acting as a standalone executable that combines a high-performance runtime, package manager, test runner, and bundler, presenting an efficient alternative to Node.js while boasting extensive compatibility and remarkably reduced startup times and memory usage. Created using Zig and leveraging Apple's JavaScriptCore, Bun executes JavaScript and TypeScript files, scripts, and packages with a performance that outshines traditional tools, and it inherently supports zero-configuration setups for TypeScript, JSX, and React applications. The integrated package manager significantly accelerates dependency installations, achieving speeds up to 30 times faster than npm, with additional features such as workspaces, global caching, migration support, and dependency auditing. Moreover, Bun's test runner, which is compatible with Jest, not only includes built-in coverage but also supports concurrent execution of tests, while its bundler can seamlessly manage TypeScript, JSX, CSS, and more without the need for configuration, enabling the straightforward creation of single-file executables. This multifaceted nature of Bun positions it as an attractive solution for developers aiming for greater efficiency and ease in their development processes. Ultimately, the combination of speed and simplicity makes Bun a compelling choice in the evolving landscape of JavaScript development.

What is 21st?

21st is a developer-focused platform designed to simplify the creation and deployment of AI agents within modern software applications. The platform provides an SDK that allows developers to define agents using simple code while integrating tools, prompts, and AI models. It supports multiple development environments and frameworks including Next.js, React, TypeScript, Python, Node.js, and other common programming stacks. Developers can configure agents to run on advanced runtimes such as Claude Code or Codex, enabling tool usage, file access, and intelligent task execution. Once the agent configuration is defined, deployment can be completed using a single command that automatically sets up infrastructure. The platform manages backend systems such as sandboxed execution environments, authentication, rate limits, and streaming responses. It also includes a drop-in chat interface component that developers can embed directly into their applications to enable user interaction with agents. Real-time token streaming allows users to see responses generated progressively, creating a more interactive experience. The platform provides built-in observability tools that allow developers to monitor conversations, replay sessions, and trace agent actions. These features make debugging and optimization much easier during development and production. 21st also includes usage controls such as per-user spending limits, quotas, and metering to help manage AI costs. By combining powerful developer tools with managed infrastructure and deployment capabilities, 21st makes it easier for teams to build and scale AI-powered agents within their products.

Media

Media

Integrations Supported

React
CSS
JavaScript
MySQL
Node.js
PostgreSQL
SQL
SQLite
Tailwind CSS
TypeScript
Zig
shadcn/ui
websockets

Integrations Supported

React
CSS
JavaScript
MySQL
Node.js
PostgreSQL
SQL
SQLite
Tailwind CSS
TypeScript
Zig
shadcn/ui
websockets

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Free
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Bun

Date Founded

2022

Company Location

United States

Company Website

bun.com

Company Facts

Organization Name

21st.dev

Company Website

21st.dev/

Categories and Features

Categories and Features

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