At high revenue, Shopify Plus is worth it compared to a custom commerce platform when your business fits the platform's building blocks for checkout, markets, B2B and integrations. You pay a licence and a few extensions instead of building and running hosting, security, updates and checkout yourself. A custom build only pays off when your business model needs processes that Shopify does not provide at its core.
Revenue alone does not settle the question. What matters is where your developers spend their time. On a custom platform, operations take a fixed share of the budget: servers, traffic peaks, security updates, payment methods and tax logic per country. On Shopify Plus, Shopify carries that layer and your budget goes into range, checkout logic and integrations.
Groundies, a barefoot shoe brand with eight-figure revenue, ran two separate systems before the move: OXID for the US and Shopware for the international markets. That meant duplicated operations, rising maintenance costs and long lead times for new storefronts and campaigns. We consolidated both systems onto one central Shopify Plus codebase and launched in stages, the US first and the international store 60 days later. The Groundies case study reports a 50% cost reduction from consolidating the two platforms and more than 100 orders within 3 days of the US launch.
For your own calculation we compare licence, apps, development, integrations and operations for both routes over the same period. The platform comparison shows how Shopify performs against other systems.