Composable Enterprise Architecture: Build Your Future IT

06.08.2025

5 min read

TL;DR

The Composable Enterprise replaces monolithic IT with modular building blocks that can be flexibly combined and swapped out.
Gartner forecasts that enterprises adopting composable architecture will roll out new features 80 percent faster than their competitors.
Packaged Business Capabilities (PBCs) and API-first design form the technical cornerstones of this approach.
Adoption begins using the Strangler Fig pattern: rather than replacing monoliths outright, organisations incrementally augment them with modular components.
For CIOs, “composable” doesn’t mean more complexity – it means reduced vendor lock-in and faster time-to-value.

Every CIO knows this scenario: A new business model demands a technical adaptation – and the IT department says it will take 18 months. In a world where market conditions shift within weeks, that’s a death sentence.

The Composable Enterprise is the architectural response to this challenge. Instead of monolithic systems – where every change requires overhauling the entire stack – it relies on modular building blocks that can be assembled, replaced, and scaled like LEGO bricks. The concept isn’t new – but the tools are.

The End of the Monolith

Monolithic ERP systems – state of the art 15 years ago – are now becoming a strategic risk. They are difficult to maintain, expensive to upgrade, and unable to keep pace with the speed of business.

The problem isn’t the technology itself – SAP, Oracle, and Microsoft build solid software. The issue lies in the architecture: a single system designed to do everything is inherently incapable of changing anything quickly. Every modification potentially affects the entire system; every update demands extensive regression testing.

The Composable Enterprise solves this challenge through decoupling. Business functions are broken down into autonomous building blocks – known as Packaged Business Capabilities (PBCs) – that communicate via APIs yet can be developed and deployed independently.

Packaged Business Capabilities in Practice

PBCs are more than just microservices with a marketing label. They encapsulate an entire business capability – such as payment processing, inventory management, or customer communications – including data, business logic, and API interfaces.

The key difference from the traditional API approach: PBCs are production-ready and swappable out of the box. If you need to switch payment service providers, you simply replace the PBC – without affecting the order management system, accounting, or reporting modules.

In practice, this is evident at companies like IKEA, which has migrated its e-commerce platform to a composable architecture. New country-specific online stores can now be launched within weeks rather than months, because the building blocks already exist and only require reconfiguration.

Getting Started: Strangler Fig, Not Big Bang

The biggest mistake in composable initiatives is attempting to replace everything at once. A better strategy is the strangler fig pattern – named after tropical strangler figs that gradually envelop their host tree.

The approach: Identify the business function under the greatest pressure to change. Extract it as a standalone packaged business capability (PBC). Connect it to the existing monolith via APIs. Repeat the process.

After 12 to 18 months, the most critical functions are modular, while the core of the legacy system continues to run stably. Compared with a big-bang approach, this method distributes risk across many small steps – not one massive, high-stakes transition.

What CIOs Must Decide Now

The composable enterprise is not a technology decision – it’s an organisational decision. It requires teams that operate autonomously, treat APIs as products, and take end-to-end ownership of a PBC’s (packaged business capability) entire lifecycle.

Three strategic questions for the next board meeting:

First, which business functions are currently slowing us down the most?

Second, which single-vendor dependencies pose strategic risk?

Third, do we have the team structure needed to support a modular way of working?

An honest answer to that third question determines success – or failure. A composable enterprise without organisational decoupling is like a sports car with the handbrake engaged.

Frequently Asked Questions

Is Composable Enterprise just a new term for microservices?

No. Microservices are a technical implementation; Composable Enterprise is a business strategy. Packaged Business Capabilities (PBCs) may internally rely on microservices – but they encapsulate a complete business capability, not merely a technical service. The emphasis is on business agility, not technical architecture.

How expensive is the transition?

Initial costs typically run 10 to 20 percent higher than a comparable monolith upgrade. Break-even occurs within 18 to 24 months – driven by faster feature delivery cycles, lower maintenance costs, and reduced vendor lock-in expenses. Over the long term, Composable Enterprise delivers significant savings.

Which companies benefit most?

Organisations facing high rates of change: e-commerce, financial services, media – and any company operating across multiple markets. The more frequently business requirements evolve, the greater the advantage of a modular architecture.

Do I need a Platform Engineering team?

Yes – at a certain scale. Platform Engineering provides the shared infrastructure that enables PBC teams to operate autonomously. For initial adoption, a small team of three to five people suffices – responsible for the API gateway, monitoring, and deployment pipelines.

Can I combine SAP with Composable Enterprise?

Yes. SAP explicitly supports a Composable Enterprise strategy through its Business Technology Platform (BTP) and the Clean Core approach. Extensions are built as independent modules on BTP – not by modifying the SAP core. This is the recommended path for SAP customers.

Source of header image: Unsplash / Shubham Dhage