You built something real. Revenue grew. The catalogue expanded. The team scaled. But somewhere along the way, the platform that once felt like a springboard started to feel more like a ceiling. If that sounds familiar, you are not alone.
There is a moment every growing ecommerce business reaches. The technology that served you well at £2 million in revenue starts to creak at £10 million. What once felt agile starts to feel rigid. Integrations become workarounds. Development cycles slow down. The roadmap you need and the roadmap your platform offers begin to diverge.
This is the mid-market inflection point, and it is one of the most consequential decisions a digital trading business will face. Choosing whether to stay, adapt or move platforms is not a technical question. It is a strategic one.
According to Gartner, poor platform fit is one of the top three barriers to digital commerce growth for mid-market organisations. Meanwhile, Forrester research consistently identifies technology constraints as a leading cause of stalled ecommerce performance among businesses scaling beyond the SME tier.
In this guide, we walk through the signals that suggest it may be time to replatform, the options available to mid-market businesses today, and how to approach the decision with confidence.
The Signs Your Platform Has Outgrown You
Most businesses do not wake up one day and decide to replatform. The decision builds gradually, shaped by friction that accumulates in the background until it becomes impossible to ignore.
The warning signs tend to follow a familiar pattern. Development requests that should take days are taking weeks. Your team has accumulated a patchwork of plugins and custom workarounds that work until they do not. New channels, whether B2B, international or marketplace, are harder to add than expected. And the technology conversations with your current agency are increasingly focused on limitation rather than opportunity.
From a commercial standpoint, the cost of inaction is rarely visible on a single spreadsheet. But it is real. Every month spent working around platform limitations is a month where conversion optimisation slows, merchandising tools fall short, and your competitors gain ground on experience and capability.
“The businesses we work with that struggle most are not those who made the wrong platform choice five years ago. They are the ones who recognised the problem but waited too long to act. A replatforming project done well is not a disruption. It is a reset. And for a mid-market business with real ambitions, that reset can unlock years of growth.”
Robert Williams, CEO, Williams Commerce
Understanding Your Options: The Platforms Worth Considering in 2026
The mid-market replatforming landscape in 2026 is more mature and more varied than it has ever been. There is no single right answer. The best platform is always the one that fits your commercial model, your team’s capability, and your growth ambitions, not simply the one that generates the most press.
Shopify
Shopify has spent the last two years consolidating its position as the platform of choice for ambitious direct-to-consumer brands and increasingly for mid-market B2B operations. Its Winter 2026 edition introduced over 150 updates, with a meaningful shift towards AI-assisted commerce and agentic storefronts that allow products to be discovered and purchased inside platforms such as ChatGPT and Microsoft Copilot.
For businesses migrating from an earlier-generation platform, Shopify offers a compelling combination of speed to value, lower total cost of ownership and a deeply integrated ecosystem of applications. Its managed infrastructure removes much of the operational overhead that weighs on mid-market teams. Shopify Markets provides genuine multi-currency and multilingual capability without the complexity that once made international trading a specialist undertaking.
If your business trades primarily direct to consumer, operates across multiple markets, or needs to move quickly with a lean team, Shopify is a serious contender.
Adobe Commerce (Magento)
Adobe Commerce remains the platform of choice for organisations with complex catalogue requirements, sophisticated B2B workflows, and a need for deep customisation. It is enterprise-grade infrastructure with the flexibility to accommodate genuinely intricate trading models, whether that is tiered pricing, account-based purchasing, custom approval flows, or large-scale product attribute management.
Integration with the broader Adobe Experience Cloud means that businesses investing in personalisation, content and analytics at scale will find Adobe Commerce a natural fit. Where Magento Open Source once served growing businesses well at lower price points, Adobe Commerce has evolved into a platform oriented towards complexity and scale.
For mid-market businesses with complex operations, a significant B2B component, or ambitions for enterprise-level personalisation, Adobe Commerce continues to offer capability that few platforms match.
BigCommerce
BigCommerce occupies a distinctive position in the mid-market. It offers native multi-storefront management, strong out-of-the-box B2B capability, and a headless-ready architecture that appeals to businesses where development flexibility and composable commerce are priorities.
Its open SaaS model means lower total cost compared with on-premise alternatives while retaining genuine customisation headroom. BigCommerce has invested significantly in its B2B Edition, which brings purchase orders, quote management, corporate accounts and buyer-level permissions natively into the platform, removing the need for expensive third-party solutions.
For mid-market businesses with a mixed trading model, multiple brands or a need for strong headless capability at manageable cost, BigCommerce deserves serious consideration.
Drupal Commerce: A Platform Worth a Second Look
Drupal has long been respected for its content management depth and flexibility, but its commerce capability has historically lagged behind the dedicated ecommerce platforms. That has changed.
The release of Drupal 11 in 2024, combined with the maturation of Drupal Commerce, has created a genuinely compelling proposition for organisations where content and commerce are inseparable.
For publishers, media businesses, membership organisations, or brands where editorial experience is as important as transactional capability, Drupal Commerce in 2026 represents an option that should not be dismissed. It offers robust content modelling, granular access controls, and a highly extensible architecture that can be tailored to trading models that more rigid platforms struggle to accommodate.
Craft Commerce: Developer-First, Content-First, Built for the Bespoke
Craft Commerce is built exclusively for Craft CMS by the same team that created the platform itself, meaning the integration between content management and commerce is genuinely seamless. Products, orders, promotions, and store settings sit alongside all web content in a single admin, with the ability to relate products to any content type across the site.
For mid-market businesses whose trading model does not fit neatly into the standard templates offered by SaaS platforms, Craft Commerce is worth serious consideration. It supports custom product logic, scalable architecture, and headless flexibility, making it well suited to businesses that need to build fast, fully tailored online stores rather than configure an existing template.
Multi-store capability allows up to five unique storefronts within a single installation, each with its own base currency, pricing, and product availability. Inventory can be tracked and managed across multiple locations, and the entire front-end and checkout workflow is open to complete customisation through flexible cart and payment APIs.
Craft Commerce 6 is currently in development and will bring authentication-based GraphQL queries, significantly improving its headless commerce support, making it an increasingly capable option for businesses considering a composable architecture.
Craft Commerce suits businesses with strong development resource, a genuinely bespoke trading model, or a requirement for editorial and commerce capability that is truly unified rather than bolted together.
Unlocking AI: What a Modern Platform Actually Gives You
There is a version of the AI conversation in commerce that stays at the surface. Chatbots. Product recommendations. A bit of personalisation. The reality in 2026 is considerably more interesting than that, and a modern platform is the key that unlocks most of it.
For businesses still operating on legacy infrastructure, many of the most compelling AI capabilities simply are not accessible. They require clean data architecture, modern APIs, and platform-level investment that only current-generation platforms provide. Moving to a modern platform does not just fix what is broken. It opens a door.
Nowhere is this more visible right now than Shopify. The company’s Winter 2026 edition, which it has called its RenAIssance Edition, shipped over 150 updates with AI at the centre of almost every one. The ambition is clear and the tools are genuinely exciting.
Agentic Storefronts is perhaps the headline capability. It allows merchants to get their products discovered and purchased directly inside AI platforms like ChatGPT, Perplexity, and Microsoft Copilot, with a single setup in the Shopify admin syndicating product data across all of them. There is no need for bespoke integrations with each platform separately. For mid-market businesses, the implication is significant: your products can now be sold inside the conversations your customers are already having with AI, not just on your own website.
Sidekick, Shopify’s AI assistant, has been substantially rebuilt and repositioned not as a simple helpdesk tool but as something closer to a proactive business advisor. It now analyses store-wide signals to surface growth opportunities, builds automated workflows from plain-language instructions, edits themes through natural language commands, and generates custom applications for the admin without any coding required. The idea of telling your platform “automatically tag customers who spend over £200” and having it build that workflow instantly is no longer a product roadmap aspiration. It is available today.
SimGym, introduced in research preview, takes a different approach to a genuine commerce pain point: the risk of testing changes on a live store. The tool uses AI-simulated shoppers with human-like profiles to model how different customer types would experience a storefront change before it goes live, letting merchants validate ideas without exposing real traffic to the experiment.
Beyond Shopify, Adobe Commerce has invested heavily in AI-powered merchandising through Adobe Sensei, its intelligent engine for personalisation, product recommendations, and predictive search. BigCommerce has been building AI capabilities into its catalogue management and marketing automation tooling, with a focus on reducing the manual overhead that mid-market teams frequently flag as a drag on productivity.
The common thread is that these capabilities sit at the platform level. They are not add-ons or third-party applications. They are built into the infrastructure. And they are simply not available to businesses still running on platforms that predate the current generation of AI integration. That gap is widening, not closing.
The Replatforming Conversation No One Talks About
Platform comparisons are easy to find. What is harder to find is an honest account of what replatforming actually involves for a mid-market business.
The data migration alone can be significant. Product catalogues with complex attributes, years of order history, customer accounts, and loyalty data all need to be moved accurately. SEO equity, built carefully over years, needs to be protected through a well-structured redirect strategy. Integrations with ERP, fulfilment, PIM and CRM systems need to be mapped, rebuilt or reconfigured.
Forrester has identified that ecommerce replatforming projects which lack a clear discovery and requirements phase are significantly more likely to overrun on cost and timeline. The businesses that handle transitions well tend to share a common trait: they treat the project as a business transformation, not a technical migration.
“The most successful replatforming projects we have delivered are the ones where the business came to us with commercial clarity. They knew what was broken, what they wanted to be able to do that they could not do today, and what success looked like twelve months after go-live. Platform selection is much easier when those questions are already answered.”
Tanya Peasgood, Head of Consultancy, Williams Commerce
How to Approach the Platform Decision
A structured approach to platform selection makes the difference between a decision the business is confident in and one that creates doubt for years afterwards. The following framework reflects how Williams Commerce approaches this conversation with clients.
- Define the commercial problem first. What specific constraints is your current platform creating? Where are you losing revenue, losing time, or losing competitive ground? Specificity matters here.
- Map your integration landscape. Every platform decision is partly a systems integration decision. Your ERP, PIM, OMS, marketing automation and fulfilment systems all need to work with whatever you choose.
- Assess total cost of ownership honestly. Licence fees are visible. Developer costs, integration maintenance, plugin subscriptions and the cost of platform-imposed limitation are often not. A platform with a higher licence fee can easily be lower total cost in practice.
- Consider your team’s capability. Some platforms reward technical investment. Others are designed to be managed by commercial teams with minimal developer involvement. Neither is better in the abstract. But fit with your team matters enormously for long-term success.
- Think about the next five years, not just today. Platform decisions are multi-year commitments. The platform that fits your business today at £10 million in revenue needs to be capable of supporting you at £30 million.
The Migration Itself: What Best Practice Looks Like
A well-executed replatforming follows a clear progression. Discovery, in which requirements are defined and the current technical landscape is mapped. Architecture, in which the new platform environment, integrations and data flows are designed. Build and migration, in which development and data transfer take place in parallel. User acceptance testing, which involves the broader business, not just the development team. And a go-live approach that prioritises business continuity and rapid iteration over a single high-risk launch event.
SEO continuity deserves particular attention. Nielsen research highlights that organic search remains the highest-value traffic channel for the majority of mid-market ecommerce businesses. A migration that does not carefully manage URL structures, redirect mapping and crawlability can undo years of search equity within weeks.
The businesses that emerge stronger from a replatforming are not simply the ones that chose the right platform. They are the ones that invested properly in the quality of the migration itself.
Quick Platform Fit Guide
Use this as a starting point only. The right platform is always a function of your specific business requirements.
Platform | Best For | Key Strengths | Consider If… |
Shopify | DTC brands, multi-market, lean teams | Speed, AI features, low TCO, app ecosystem | Growth pace matters more than deep customisation |
Adobe Commerce | Complex B2B, large catalogues, enterprise personalisation | Deep customisation, Adobe Experience Cloud integration | Trading model is genuinely complex |
BigCommerce | Multi-brand, B2B, headless commerce | Native B2B Edition, open SaaS, composable-ready | Mixed B2B and DTC model with developer resource |
Drupal Commerce | Content-led commerce, media, membership | Content modelling depth, editorial control, flexibility | Commerce and content are equally important |
Craft Commerce | Bespoke trading models, developer-led builds | Custom product logic, unified content and commerce, headless-ready | Development resource is available and trading model is non-standard |
The Cost of Staying Still
There is a version of this conversation that focuses entirely on the risk of moving. The technical complexity. The project budget. The team disruption. Those risks are real and they deserve careful management.
But the conversation is incomplete without an honest accounting of the cost of not moving. Gartner estimates that by 2026, businesses running legacy ecommerce infrastructure will spend up to 40 per cent more on technology maintenance than those operating on modern platforms, simply to sustain equivalent performance levels. That is resource that is not going into growth, experience improvement or innovation.
For mid-market businesses, the competitive implications compound over time. Businesses on modern platforms can iterate faster, adopt new channels earlier, and deploy AI-powered features with less friction. The gap between the businesses that have invested in the right infrastructure and those that have not is widening, not closing.
Williams Commerce in Action: Replatforming Case Studies
Understanding the theory of replatforming is one thing. Seeing what it produces for real businesses is another. Here are two examples from our own client work that illustrate what a well-executed migration can achieve.
Gilson: Replatforming to Adobe Commerce to Transform B2B Self-Service
Gilson is a global manufacturer of precision instruments and laboratory equipment, supplying universities, pharmaceutical companies, and major corporations worldwide. When the business approached Williams Commerce, it was operating an ecommerce environment that could not support its ambitions for B2B self-service and digital growth.
The project involved Gilson replatforming to Adobe Commerce, with Williams Commerce enabling an omnichannel view for a new self-service portal, as well as managing the migration of Gilson’s Product Information Management system and EDI implementation.
The work was a genuine collaboration between the Williams Commerce team and Gilson’s own internal digital team. The result was an interactive self-service portal enabling easy online ordering, account balance management, payment processing, and order status updates, all in one place for a client base that includes some of the world’s most demanding research institutions.
The portal delivered a 245% higher average order value compared with other areas of the site, alongside a 30% increase in page views and visitors spending 30 seconds longer engaging with the portal.
The project went on to win two industry awards: Outstanding Evolution, Customer Experience in B2B at the Direct Commerce Awards 2024, and Silver in B2B Ecommerce Website of the Year at the UK Ecommerce Awards 2024. Read about the double award win. It is a strong example of what replatforming can deliver when commercial ambition and technical execution are properly aligned.
Sarsen Stone Group: Consolidating Four Brands onto a Single Adobe Commerce Platform
Sarsen Stone Group is the parent company of four distinct tile and interiors brands: Artisans of Devizes, Ca’ Pietra, Proper Good Paint, and the National Trust Tile Collection. Managing four separate ecommerce presences had become operationally complex and was limiting the group’s ability to grow efficiently.
Williams Commerce worked with Sarsen Stone Group to build a new, centralised ecommerce infrastructure on Adobe Commerce, bringing all four brands under a single platform instance while preserving each brand’s distinct identity and customer experience.
The project delivered a 60% boost in revenue and a 101% rise in conversion rate. The ability to manage multiple brand storefronts from a single backend removed significant operational friction and gave the group a platform architecture genuinely capable of supporting its next phase of growth.
As the client noted at the time, the new web infrastructure became an integral part of the group’s growth strategy, with the ability to manage multiple websites from one place sitting at the heart of how the business intended to scale.
Where to Start
If this article has resonated, the most valuable first step is rarely a platform demo. It is a clear-eyed review of what your current platform is costing you, commercially and operationally, and what you need to be able to do that you cannot do today.
Williams Commerce has spent over 15 years helping mid-market and enterprise businesses make exactly this transition. We are platform-agnostic in our advice, partnered with Shopify, Adobe Commerce, BigCommerce, and experienced with Drupal Commerce, and we have delivered complex replatforming projects across retail, manufacturing, healthcare and professional services.
The right platform exists for your business. The question is whether the conversation to find it has started yet.
Get in touch with our team to begin a no-commitment platform review.
Your First Call With Us: FAQs
No. Our approach is platform-agnostic. We will listen first and recommend second.
Broadly: what your current platform is stopping you from doing, how your business trades, and where you want to be in three to five years.
If it feels like a good fit, we can scope a formal platform and data investigation, a structured piece of consultancy that maps your requirements and arrives at a clear, evidenced recommendation. We can also arrange a live demo of any platform you are curious about, so you can see the capability for yourself before any decisions are made.
Absolutely. A demo is often one of the most useful early steps. Seeing what a modern platform can actually do, from AI-powered merchandising to B2B self-service workflows, tends to make the decision considerably clearer.
It varies by complexity, but most discovery engagements run between two and four weeks and produce a documented roadmap you can act on straight away.
That is fine. The investigation might confirm your current platform still has headroom. Either way, you will leave with clarity.
Simply get in touch with our team. The first conversation costs you nothing but an hour of your time. Email our sales team on [email protected] or call us to discuss further on 0116 326 1116.
