OpenStore
Composable storefront primitives for teams that want ownership of their stack.
01 THE PROBLEM & MOTIVATION
Why we had to
build this.
OpenStore is an un-opinionated, headless commerce foundation built for Next.js 16 and React 19. It strips away SaaS merchant lock-in, giving product teams complete control over cart state, checkout orchestration, inventory synchronization, and custom pricing models.
The Core Problem:
Traditional hosted platforms force teams into rigid template engines, restrictive checkout APIs, and steep transaction rev-shares. Building from scratch takes months. OpenStore provides the robust primitive layer — cart pipelines, payment adapters, and stock reconcilers — without dictating design or hosting.
Who it is built for:
- High-growth DTC brands outgrowing Shopify checkout limitations
- Digital product studios building bespoke client marketplaces
- Engineering teams requiring multi-currency, localized, offline-first carts
02 SYSTEM ARCHITECTURE
How the pieces
fit together.
A layered edge-first architecture: client-side optimistic UI cart, edge middleware session hydration, and modular provider adapters for Stripe, Razorpay, and custom warehouses.
Storefront UI
React 19 Server Components with Optimistic Cart Hooks
Cart Pipeline
State synchronization with conflict resolution and offline queue
Adapter Engine
Unified connector interface for Stripe, Medusa, and Postgres
Inventory Mesh
Idempotent stock allocation with webhooks
03 CORE CAPABILITIES
Designed for
real production.
Zero-Latency Optimistic Cart
Instant cart modifications that reconcile in the background without blocking layout shifts.
const { addItem, items, subtotal } = useCart()
await addItem({ id: 'sku_123', quantity: 1, optimistic: true })Pluggable Payment Gateway Mesh
Switch from Stripe to Razorpay or local bank rails with a single environment config change.
export const checkout = createCheckoutSession({
provider: 'stripe',
mode: 'payment',
lineItems: cart.items
})Multi-Tenant Currency & Tax Engine
Real-time localized price conversions and VAT calculation at edge without cold start latency.
8x faster than Shopify
Zero external runtime
240 unit & e2e tests
+28% this month
04 PUBLIC ROADMAP
What's shipped and
what is next.
Multi-Warehouse Inventory Splitting
Route order line items to distinct fulfillment hubs dynamically.
One-Click Subscriptions Engine
Recurring billing primitives without third-party vendor lock-in.
Agentic Checkout Assistant
Natural language shopping interface for mobile and terminal clients.
05 JOIN THE LAB
Contribute to
OpenStore.
Whether you want to file an issue, submit a design example, optimize an edge route, or write documentation, all contributions are welcomed and credited.