💫 Best Open-Source State Tools in 2026

Zustand is a small, fast, and scalable state management library for React applications, providing a minimalistic and intuitive API.

A powerful library for asynchronous state management and server-state utilities with data fetching capabilities for web applications, supporting TS/JS, React Query, Solid Query, Svelte Query, and Vue Query.

Immer is a JavaScript library that allows you to work with immutable state by mutating the current state, simplifying state management in your applications.

👻 Primitive and flexible state management solution for React, providing minimal and efficient hooks for managing state.

Type-safe search parameters state manager for React frameworks, functioning like useState but stored in the URL query string, enhancing URL-based state management in React applications.

Valtio makes proxy-state management simple for React and Vanilla JavaScript applications.

Automerge is a powerful library that provides a JSON-like Conflict-free Replicated Data Type (CRDT) data structure, enabling concurrent modifications by different users and automatic merging of changes. It helps developers build collaborative and offline-first applications with strong consistency guarantees.

Headless, performant, and type-safe form state management for TypeScript/JavaScript, supporting React, Vue, Angular, Solid, and Lit.

Manage state with style in every framework, providing efficient and fine-grained reactivity for modern web applications.

LiveStore is a next-generation state management framework based on reactive SQLite and a built-in sync engine, designed to make state management more efficient and seamless.