12/05/2026
Headless. Composable. MACH.
Three words sold as the same product. They're not.
🎯 Headless — splits the front end from the back end. The back end can still be a monolith.
🧩 Composable — the back end itself breaks into best-of-breed modules (CMS, search, payments, PIM).
☁️ MACH — a philosophy for HOW those modules are built. Microservices, API-first, Cloud-native, Headless.
📊 What the 2026 numbers actually say:
— Shopify Plus: $2,300/mo + a 0.25–0.40% variable fee above ~$800K monthly GMV
— commercetools: from $40K/year (Core), $150K+/year (Premium)
— MACH Alliance: 9 out of 10 rollouts meet or beat ROI — but the sample is companies with $500M+ in revenue. Not a benchmark for the Polish mid-market.
💡 The point:
80% of mid-sized Polish merchants (GMV PLN 5M–30M) need Headless — not full Composable, not MACH.
Full MACH only earns its keep at 3+ markets, complex B2B, and GMV closer to PLN 100M than PLN 30M.
Jumping to full MACH on a mid-sized store is like swapping the engine and chassis when the car just needed new tires.
📌 PS.
If you're designing your e-commerce architecture for the next 5 years and you haven't asked "Do I need Headless?" — pause the project and ask now.
Full breakdown in the comments 👇