🔷 Best Open-Source TypeScript Tools in 2026

🚀 Strapi is the leading open-source headless CMS. It’s 100% JavaScript/TypeScript, fully customizable, and developer-first.

A collection of TypeScript type challenges with an online judge to test and improve your type manipulation skills.

Zod is a TypeScript-first schema validation library that provides static type inference, allowing developers to ensure type safety and accuracy in their code.

Payload is an open-source, fullstack Next.js framework offering a complete TypeScript backend and admin panel. It can be used as a headless CMS or for building powerful applications.

🧙‍♀️ Move Fast and Break Nothing. End-to-end typesafe APIs made easy, providing a seamless experience for creating scalable APIs with full TypeScript support.

TypeORM is an advanced ORM for TypeScript and JavaScript that provides support for major SQL databases including MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, SAP Hana, and WebSQL. It enables developers to work with databases in both server-side (Node.js) and client-side environments, offering a seamless experience in browsers, Ionic, Cordova, and Electron platforms.

Lerna is a fast, modern build system for efficiently managing and publishing multiple JavaScript/TypeScript packages from a single repository.

A build system optimized for JavaScript and TypeScript projects, utilizing advanced techniques for fast and efficient builds. Written in Rust for performance and reliability.

mastra is a powerful TypeScript AI agent framework designed for building intelligent assistants, retrieval-augmented generation (RAG) systems, and advanced observability features. It supports integration with any large language model (LLM), including GPT-4, Claude, Gemini, and Llama.

A collection of essential TypeScript types that aid in static type checking and code quality enhancement.