PUBLISHED DATE: 2025-08-13 03:22:15

Say Goodbye to Build vs Buy…

To Deliver Modern Customer Experiences, the Right Choice is Composable Commerce

Table of Contents

Executive Summary

The digital commerce landscape is evolving rapidly. Customers expect seamless, personalized experiences across every touchpoint, and businesses must keep pace to remain competitive. Traditional monolithic commerce platforms are struggling to deliver the agility, scalability, and innovation required in today’s market. As a result, organizations are increasingly turning to composable commerce—a modular, best-of-breed approach that enables brands to assemble and reassemble commerce solutions to meet their unique needs.

In this white paper, we’ll discuss:

Introduction

“Cloud has given rise to lots of best-of-breed vendors and a very big marketplace. I mean it’s very much a meritocracy out there. There are probably 30 different CMSes retailers can choose from, but there’s only two getting the majority of the business because they’re the ones that are best-in-class.”

— Kelly Goetsch, Chief Strategy Officer, commercetools

The technologies at the core of MACH architecture include:

The Composable Solution

“The future of e-commerce is composable. Fusing content with commerce is the way to power the stack your team wants, and the experiences your business needs.”

— Nishant Patel, Co-Founder and CTO, Contentstack

91% of IT decision-makers say MACH and composable architecture will help their company succeed by 2029, according to MACH Alliance research.

What is Composable Commerce?

Coined by Gartner® in 2020, composable commerce is a development approach that enables businesses to “leverage packaged business capabilities (PBCs) to move toward future-proof commerce.” PBCs are a set of APIs that deliver functions such as search, cart, or checkout and serve as building blocks to a composable commerce solution.

To embrace a composable commerce approach, businesses must have a technology infrastructure that enables PBCs to be integrated easily and without risk. This is accomplished through MACH architecture. This is why composable commerce and MACH architecture are intrinsically connected.

Composable commerce at a glance:

The Mythical Control of Building Your Own

When an organization announces a strategy to build their own commerce platform, it’s fueled by the desire to have total control. Many leaders believe the only way to control the destiny of the customer’s experience, and thus the success of their business, is by building technology from the ground up based on their knowledge of their brand and strategic vision.

The fact is, as they’re the only ones guiding that destiny, they’re sabotaging it at the same time. What retailers sometimes don’t recognize is that with total control comes:

In a world powered by modern MACH service-based architecture, there’s no reason you can’t have total control while side-stepping the fundamental build process. Buying your core components doesn’t hinder your ability to control your commerce experience. On the contrary, it gives you more freedom.

First, you’re not really “buying” anything because all of your components are SaaS-based, so you can swap them out at any time. And, because the environment of composable is MACH-based and therefore agnostic by design, you can make modifications and updates, add custom features and experiment with new capabilities at any time without risk. You can make mistakes and fail fast.

Alex Shiferman, chief technology officer of Nuts.com, a pure-play online retailer, told the audience of a 2022 industry conference, “I come from an older world — the monolithic e-commerce platform world — where essentially most of the decisions are made for you. In a composable world, you have a ton of autonomy at a very granular level. And, that can be exciting, but it’s also challenging because you can make a lot of right decisions and you can make a lot of wrong decisions. So, with great power comes great responsibility — this is a perfect example. You have a lot of control, but if you try and that works, great. And, if it doesn’t, you’ve got to learn some from your mistakes.”

More Myths and Misconceptions

Most explanations that brands give for taking the homegrown approach are, at their core, dismissible. There may have been a grain of truth to some of them at one time, but others are simply false — and all you have to do is talk to your peers, industry thought leaders or consult analyst reports to gain insight that will refute any objections you might have. Here are some of the most common myths misleading retailers today.

5 Questions to Ask Yourself Before Committing to an In-House Build

  1. Do you have the right team in place to build and maintain a commerce platform for the next 10 years?
  2. Are you prepared to invest significant time and resources into ongoing updates, security, and compliance?
  3. Can you keep up with the pace of innovation in commerce technology?
  4. Will building your own platform truly differentiate your brand, or will it distract from your core business?
  5. What is the opportunity cost of focusing on technology over customer experience?

The Composable Approach: Evolution versus Revolution

“The only reason to build is for differentiation. You shouldn’t be building to build to the standard, you should only be building and modifying your code to differentiate yourself from the competition.”

— Jon Panella, Group Vice President, Publicis Sapient

There was no way to take this approach in the past. You couldn’t bring in a set of capabilities and services and take your time replacing parts to ultimately get to your end goal – and this is the key difference between traditional and modern commerce.

Evolutionary Best Practices

Now is the time to migrate. What are the fundamentals needed to embrace composable commerce?

  1. Define your why
    Before embarking on the path to transformation, you must establish your goals and your vision for the future. Take stock of the issues and challenges you face in delivering commerce to customers and include solutions in your end vision. Once your why is defined, share it with everyone in your organization. This will keep you focused and propel the project forward.
  2. Gain buy-in (from both sides)
    You can’t just shift the technology; you have to shift your organizational mindset. Your goal is to get everyone excited about the benefits of migrating to composable commerce – specifically the freedom it gives nontechnical digital teams to initiate projects autonomously. It’s critical to involve both business and tech teams at the beginning so they understand “what’s in it for me” and can provide input. If you wait until the end, there’s a great chance you may have to go back and make changes to adapt to the way different teams work and/or details you may not have considered. As Taher Khaliq, CTO of Trinny London, a UK-based beauty brand, explained, “With black-box platforms, all the decisions are made for you. You just need to fit into their workflow, their journey. What that means is IT needs to be far more aware ... it needs to be owned by the business as a whole.”
  3. Do your due diligence
    Run a full gap analysis to provide a big-picture view of the scope of the project and use the information to put together a complete plan. Once you have your prioritized list, the next step is to identify where it’s possible for you to achieve your ideal with functionality you can buy from best-in-class SaaS vendors. What’s left will be the features you’ll need to build. Involving a digital consultant or SI in this process can be incredibly helpful. Keep in mind, the migration process opens up multiple opportunities to consolidate and streamline your commerce operation, creating savings across the board.
  4. Make commerce and content your core
    There are many ways to get on the composable journey. One of the first questions retailers typically ask is, “Do I choose a product first or do I choose an implementation consulting partner first?” That’s up to you. Both options work. If you choose a consultant first, they can help you identify the best commerce and content vendors for your specific needs. They’ll also work with you to determine what additional capabilities you need and assess which of these are available to buy and which ones you’ll need to build.

    On the other hand, if you already have commerce and content vendors in mind, you can start there. Make sure you are choosing the most robust, proven vendors as these are the two most important components for your core businesses. Don’t be afraid to ask for proof of concept before you make a commitment.
  5. Leverage the resources available to you
    Considering the complexity of commerce today, along with the fact that there are best of breed vendors out there creating products specifically for modern commerce and multiple industry resources to turn to for guidance, it’s perplexing that any retailer would consider DIY as an option.

    Take the time to explore the Gartner™ Magic Quadrant for Digital Commerce and The Forrester™ Wave for B2B and B2C Commerce as well as the Paradigm B2B Combine. All of these utilize a combination of data-driven metrics and customer feedback to deliver deep intel into the capabilities of the top commerce vendors, making them invaluable for making informed purchasing decisions.

    Connecting with The MACH™ Alliance should also be included in your migration plans. As the first organization to advocate for MACH-driven architecture, its members have extensive expertise and experience in building composable commerce solutions. Supporting retailers on the path to digital transformation is engrained in the organization’s overall mission.
  6. Rethink your team structure
    Vertically organized teams are better suited for MACH architecture. Bringing together people with different skill sets to deliver and support a feature such as cart, checkout, promotions, etc. not only prevents bottlenecks in the migration process but speeds up releases over the long term.
  7. Start small, innovate incrementally
    Whether it was a microsite, a sub-brand, or a chunk of functionality that caused issues in the past, tackle your less important assets first and shift your digital business in phases. Employ the strangler pattern to replace pieces of functionality with microservices. Using this pattern, you test the new component in parallel with the old functionality and transition from old to new before eliminating or “strangling” it entirely.

    This approach allows you to experiment with components and switch them in and out if they’re not meeting your expectations. It also eliminates any potential disruptions to your day-to-day business, giving you more control over the process and allowing you to recognize results along the way.
  8. Deliver your differentiation
    Always remember that the power behind the composable “buy and build” approach is that it ensures you can keep a razor focus on why customers shop with you. Whether it’s loyalty, custom kitting, bulk pricing discounts, fitment guides, virtual try-ons, it doesn’t matter, you can build it and deploy it. Plus, you’re able to continue to fine-tune and refresh what’s successful to continually deliver newness to customers, and you easily remove unsuccessful features. You’ll find that empowering your business teams to experiment with creative marketing promotions, expand into new markets, introduce products, host partnerships, add touch points, not only delivers results on your bottom line, it also increases productivity and improves job satisfaction.

The Partner Ecosystem

Conclusion

Meet the Contributors

Publicis Sapient

Publicis Sapient is a digital business transformation company. We partner with global organizations to help them create and sustain competitive advantage in a world that is increasingly digital. Our expertise spans strategy, consulting, experience, and engineering, with a focus on helping clients become more agile, customer-centric, and data-driven.

https://www.publicissapient.com

commercetools

commercetools is the leading commerce platform built on modern MACH principles (Microservices-based, API-first, Cloud-native and Headless), allowing you to work with your commerce solution in a more agile, flexible and scalable way. commercetools enables businesses to create powerful, highly customized commerce experiences while reducing complexity and cost.

https://commercetools.com/

Contentstack

Contentstack is the leading Composable Digital Experience Platform (DXP) that empowers marketers and developers to deliver composable digital experiences at the speed of their imagination. Contentstack’s headless CMS and automation capabilities enable organizations to orchestrate content, commerce, and digital experiences across every channel.

http://www.contentstack.com