Kin StoreReactive state you want to use.

Framework-agnostic. Zero dependencies. 100% type-safe.
Start with 244 B and add only what you need.

🪜

Start simple, grow freely

Begin with createStore and three methods. Add withPlugins for structure, derive for composition. Each step is additive — nothing you built needs to change.

🔒

100% type-safe by default

Every reducer, dispatch call, and plugin method is fully inferred. No any, no manual annotation at call sites. The type system is load-bearing, not decorative.

📦

Tiny and pay-per-use

244 B for createStore. 465 B for derive. 1.07 KB for withPlugins with the full plugin system. Zero cost for capability you haven't opted into.

🔌

Flat plugin composition

Each .use() adds one line — not one nesting level. Read the pipeline top-to-bottom, not inside-out. No conflicting middleware assumptions.

🔍

Explicit, not magic

No hidden merges, no auto-propagating destroy, no implicit dependency graphs. If something happens, you triggered it.

⚛️

Framework-agnostic

Works in any framework or none. React bindings ship separately, backed by useSyncExternalStore for concurrent mode safety.

How it compares

	Kin Store	Zustand	Redux / RTK	Jotai	MobX
Bundle size	244 Bminimal465 Bcomposition1.07 KBplugin support	~1.1 KB	~10 KB	~3.5 KB	~16 KB
Zero dependencies	✅	✅	❌	✅	✅
100% type-safe	✅	⚠️	⚠️	✅	✅
Low boilerplate	✅	⚠️	❌	⚠️	⚠️
Opt-in complexity	✅	⚠️	❌	⚠️	❌
No hidden magic	✅	✅	✅	⚠️	❌

See full comparison with code examples →