Shopify Plus is Shopify's fully hosted enterprise ecommerce platform. It was designed to support large brands and fast growing starts on Shopify's highly distributed, multi-tenant platform and shorten the time to launch your ecommerce site. Shopify Plus customers include Wikipedia, Los Angeles Lakers and BlackMilk.
Demac is in a small handful of agencies who are official Shopify Plus Partners. Merchants can build their stores with Shopify Plus and extend their functionality through the App store, restful APIs or SDKs.
The Shopify Plus platform was engineered for reliability and scale, using enterprise-level technology made available to businesses of all shapes and sizes.