Jotai + Valtio

Atomic + proxy state

FreeLibraries & build toolingjotai.org

What it is

Two smaller state libraries from the same authors as Zustand. Jotai (v2) builds state from tiny composable atoms with derived values, Recoil-style. Valtio (v2) wraps an object in a proxy so you mutate it directly and components re-render automatically.

Why it earns a slot

Reach for Jotai when state is a graph of interdependent values — a form builder or editor — where Zustand selectors get unwieldy. Valtio suits ports of mutable, class-like logic.

Know before you commit

Both have smaller communities than Zustand, so AI models generate less reliable code for them. Valtio proxies can surprise you when objects escape into non-React code.

Getting started

npm install jotai

Field notes

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Pricing snapshot

Free · MIT

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Drop into your Lovable chat

Evaluate Jotai + Valtio (https://jotai.org) for this project, then use it only if it fits what we are already building.
Context: Atomic + proxy state. Two smaller state libraries from the same authors as Zustand. Jotai (v2) builds state from tiny composable atoms with derived values, Recoil-style. Valtio (v2) wraps an object in a proxy so you mutate it directly and components re-render automatically.
Reviewer notes (general, not written for this codebase): Reach for Jotai when state is a graph of interdependent values — a form builder or editor — where Zustand selectors get unwieldy. Valtio suits ports of mutable, class-like logic.
Watch out for: Both have smaller communities than Zustand, so AI models generate less reliable code for them. Valtio proxies can surprise you when objects escape into non-React code.
Pricing: Free · MIT
Setup: npm install jotai
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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Neighbourhood

How Jotai + Valtio sits against the rest of the atlas — swaps, companions and the tools builders actually save alongside it.