What composable commerce is
Composable commerce is an architecture where commerce capabilities are assembled from best-of-breed parts — a commerce engine for cart, checkout, and orders, a PIM for product data, a headless CMS for content, and a custom storefront on top — instead of one monolithic suite doing all of it adequately. Each piece is replaceable through APIs, so the stack evolves component by component rather than by decade-defining replatform.
The architecture, in plain terms
A composable commerce stack has four load-bearing parts, each doing the one thing it’s best at:
- The commerce engine — cart, checkout, pricing, orders, promotions. Typically commercetools for complex, multi-market, or B2B catalogues, or Shopify run headless when its checkout and operations are the asset worth keeping.
- The PIM — product information management, usually Akeneo in the estates we work with: one governed source of truth for product data, feeding the engine, the storefront, and every marketplace and feed downstream.
- The headless CMS — the content layer: campaign pages, editorial, brand storytelling, and the content that wraps the catalogue. Marketing publishes without developers, and without asking commerce for permission.
- The custom storefront — the front end that composes all of it into one fast experience. This is the part you own outright, and the part your customers actually touch.
The connective tissue — APIs, event flows, the search index, the ERP sync — is where composable projects are won or lost, which is why we treat integrations as first-class scope rather than a line item called “misc.”
When composable is right — and when a suite is fine
The buzzword tax is real: composable gets sold as a virtue when it’s a trade. It buys flexibility at the price of integration responsibility, and that trade only pays off under real complexity.
Composable earns its keep when
- The catalogue is genuinely complex — deep variant structures, configurable products, B2B pricing and contract logic.
- You run multiple brands or markets and need one platform serving all of them with local pricing, language, and assortment.
- An ERP or PIM is already the system of record, and the suite keeps fighting it.
- Content is a competitive weapon, and the suite’s content tooling is where campaigns go to die.
A suite is honestly fine when
- One brand, one market, a straightforward catalogue.
- Standard checkout and merchandising cover the business model.
- There’s no in-house or partner capacity to own an integrated stack.
- Speed to launch beats architectural control — for now.
If you’re in the second column, we’ll tell you — and a fast headless storefront in front of a suite you keep is often the better project. Composable is an answer to complexity, not a badge.
What Bejamas builds
We’re the team for the parts of composable that vendors don’t ship:
- Storefronts. Custom front ends on modern frameworks, engineered to Core Web Vitals budgets — because in commerce, performance is a revenue line, not a vanity metric.
- Content–commerce integration. The hard middle: product data and CMS content composed on the same page, campaign pages that merchandise from live catalogue data, and editorial workflows where marketing publishes without waiting on commerce releases.
- PIM wiring. Akeneo (or the PIM you have) connected properly — product data flowing to the engine, the storefront, and the search index from one source of truth, instead of hand-synced spreadsheets pretending to be integration.
- The migration around it. Moving off a suite or a legacy platform is a website migration with commerce stakes: URLs, rankings, and product pages that earn revenue can’t drop during the cutover.
One partner, end to end — from architecture through storefront through the integration seams — rather than an engine implementer, a CMS agency, and a front-end shop discovering each other’s assumptions in production.
Testimonial
Together, we’ve built a fast, future-ready website that reflects the latest in web innovation and is scalable to meet our growth ambitions.
How it starts
Not with a platform decision — with an audit. We map the catalogue and its real complexity, the systems of record (ERP, PIM, OMS), the content flows, and the current platform’s actual constraints, then model the composable stack against the suite alternative on total cost of ownership. The output is an architecture and a phased plan where every phase ships something — usually starting with the storefront and content layer, because that’s where customers feel the difference first. If the numbers say stay on the suite, the audit pays for itself by ending the conversation honestly.
Commerce work in practice
View all work
Common questions
What’s the difference between composable commerce and headless commerce?
Headless describes one seam: the storefront is decoupled from the commerce backend and talks to it over APIs. Composable goes further — the backend itself is decomposed into independent parts (engine, PIM, CMS, search, payments), each swappable. Every composable stack is headless; a headless stack on a single suite isn’t yet composable. In practice the terms blur, and the architecture matters more than the label.
Is composable commerce overkill for us?
It genuinely can be. If you have one brand, one market, a catalogue in the hundreds of SKUs, and standard checkout needs, a well-run suite — Shopify being the obvious example — is the right answer, and an honest partner says so. Composable earns its complexity when the suite is what’s constraining you: catalogue structure it can’t model, markets it can’t serve from one setup, or content and commerce fighting each other on every page.
commercetools or Shopify as the engine?
commercetools is the deep end: fully API-first, built for complex catalogues, multi-market setups, and B2B logic, with the integration effort that implies. Shopify used headless keeps its world-class checkout and operational tooling while you take over the front end and the content layer — often the pragmatic engine for B2C brands going composable. The audit scores both against your catalogue and your team; the honest answer is frequently Shopify, even from an agency that loves commercetools.
Do we have to replace everything at once?
No — and you shouldn’t. The strength of the architecture is that it arrives incrementally. A common sequence: put a headless CMS and a fast storefront in front of the existing commerce backend first, then swap the engine or wire in the PIM in later phases. Each step ships value on its own, and none of them is a bet-the-company launch.
What does a composable commerce build cost?
More upfront than a suite, less over time if — and only if — the complexity is real. You’re paying for integration engineering and a custom storefront instead of a single license, and you stop paying the suite tax: forced bundles, revenue-share pricing tiers, and workarounds for everything the suite almost does. Bejamas scopes the number during a paid audit that maps your catalogue, integrations, and content flows — and if the model says a suite is cheaper for your case, that’s what the report says.