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About

Bun is a fast, all-in-one JavaScript, TypeScript, and JSX toolkit that ships as a single executable and combines a high-performance runtime, package manager, test runner, and bundler designed as a drop-in replacement for Node.js with broad compatibility and dramatically reduced startup times and memory usage. Written in Zig and powered by Apple’s JavaScriptCore, Bun can execute JavaScript/TypeScript files, scripts, and packages with significantly faster performance than traditional tooling while supporting zero-config TypeScript, JSX, and React out of the box. Its built-in package manager installs dependencies up to 30x faster than npm with workspaces, global caching, migration support, and dependency auditing. Bun’s test runner is Jest-compatible with built-in coverage and concurrent execution, and the bundler processes TypeScript, JSX, CSS, and more without configuration, including support for single-file executables.xx

About

Vitest is a next-generation testing framework powered by Vite, designed to make testing fast, lightweight, and closely integrated with modern JavaScript development. Because it builds on Vite, Vitest understands existing Vite configuration and can reuse the same resolve and transform pipelines used by an application during development and builds. It can also be used without Vite and works for backend code as well. Vitest provides a Jest-compatible API, including expect assertions, snapshots, mocking, and coverage, making migration from Jest straightforward for many projects. Its smart watch mode reruns only tests related to changed files, using an experience similar to Vite’s instant Hot Module Replacement. Vitest supports ESM, TypeScript, and JSX out of the box, reducing the need for separate transformation configuration.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Developers and teams building JavaScript and TypeScript applications who want a fast, all-in-one runtime and toolkit to run, test, bundle, and manage packages with high performance and Node.js compatibility

Audience

Developers seeking to run fast unit tests with Vite-native tooling, Jest-compatible APIs, and integrated modern web development workflows

Support

Phone Support Not Supported
24/7 Live Support Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

Free
Free Version Supported
Free Trial Not Supported

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 Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Bun
Founded: 2022
United States
bun.com

Company Information

Vitest
United States
vitest.dev/

Alternatives

Alternatives

No Alternatives
LemonadeJS

LemonadeJS

Jspreadsheet
WebStorm

WebStorm

JetBrains

Categories

Package Managers Supported

Categories

Software Testing Supported

Integrations

JavaScript Supported
TypeScript Supported
CSS Supported
Chromatic Not Supported
MySQL Supported
Node.js Supported
PostgreSQL Supported
React Supported
SQL Supported
SQLite Supported
UI Verify Not Supported
Vercel Not Supported
Vite Not Supported
Zammad Not Supported
Zig Supported
boat Supported
websockets Supported

Integrations

JavaScript Supported
TypeScript Supported
CSS Not Supported
Chromatic Supported
MySQL Not Supported
Node.js Not Supported
PostgreSQL Not Supported
React Not Supported
SQL Not Supported
SQLite Not Supported
UI Verify Supported
Vercel Supported
Vite Supported
Zammad Supported
Zig Not Supported
boat Not Supported
websockets Not Supported
Claim Bun and update features and information
Claim Bun and update features and information
Claim Vitest and update features and information
Claim Vitest and update features and information