Cartly — the e-commerce platform built by WS24

Cartly is a next-generation e-commerce platform built by WS24: a hybrid architecture that renders storefronts with Liquid SSR and adds React only where interaction is needed (Islands), backed by a Go core and a unified GraphQL API. It is Online Store 2.0 compatible, so teams keep the Shopify theme syntax they already know.

Why we built it

WS24 shipped 200+ Shopify stores as Shopify Plus partners. After hitting the same webhook races, checkout limits, and performance ceilings on every project, we built our own platform — keeping what works about Shopify and removing what doesn't.

Cartly vs Shopify — where it actually matters

Cartly targets the pain points Shopify Plus leaves open: raw performance, backend flexibility, and full control of the storefront and checkout, without giving up the familiar theme model.

The stack — six pieces

The whole platform is six components: Nginx, a Go core, Node, PostgreSQL, React, and GraphQL. Storefronts render server-side in Liquid with no JavaScript until interaction, for fast mobile loads and strong Core Web Vitals (a 98/100 Lighthouse performance score).

Theme development your team already knows

Cartly themes use the same Liquid syntax, the same sections/ folder, and the same index.json templates as Shopify. The only new thing — and it is optional — is dropping <island> tags where you want React interactivity.

Migrating from Shopify, or starting fresh

Tell us about your architecture and we return a migration plan, GMV-tier pricing, and a sandbox environment within 48 hours. See our case studies, or reach us at [email protected].