Gymshark's Shopify Empire Did Not Build Itself

Montirex Followed the Same Pattern

Daniel Yuen and Kieran Riddell-Austin founded Montirex in Liverpool in 2019. They started selling three t-shirts from a living room. Within a year, Footasylum had put the brand on shelves across the UK and both founders went full-time. By 2023, Montirex had opened a new headquarters in Speke, employed 35 people, and was stocked in JD Sports stores nationwide.

The numbers that followed are hard to argue with. Revenue went from £33.4 million to £76.7 million in a single financial year. Pre-tax profits moved from £3.5 million to £20.8 million across the same period. The brand is projecting £130 million in the current financial year and is targeting European and US expansion. It runs on Shopify throughout.

The platform was not swapped out at scale. What changed was the quality of work done on it. When Montirex brought in specialist support to audit the backend, fix the theme structure, and optimise the code, the store hit a 96% performance score on GTmetrix and organic rankings improved with it. The product was already strong. The audience was already there. The bottleneck was the technical work that had not been done. That is what a specialist Shopify agency addresses from day one of an engagement.

The Ceiling DIY Cannot Break

Almost every ecommerce owner does the same thing in the early days. They build the store themselves. They learn Shopify by doing. They handle the products, the copy, the ads, the email sequences, the customer service, and the late-night troubleshooting when an app breaks the night before a peak trading period. This is not a bad approach. It is how founders learn their business.

But there is a ceiling to Shopify growth, and it arrives quietly and then all at once. The store looks fine. Traffic is coming in. The conversion rate sits at 1.2% when it should be closer to 3%. Collection pages are locked out of Google because the theme is blocking indexation. There is no schema markup, so rich results never appear in search. Two apps are conflicting and nobody can work out why checkout abandonment jumped last month. The product feed has errors Google Merchant Centre flagged six weeks ago and nobody has had time to fix.

These are not unusual problems. They are the standard list. And every one of them is costing real money in real time. A specialist Shopify SEO agency spots all of them inside the first audit.

The owner keeps doing what they can. They watch YouTube tutorials. They read Shopify documentation. Progress happens, slowly. But the plateau does not break, because breaking it requires a level of cross-store pattern recognition that only comes from doing this work at scale, across dozens of different businesses, over years. Every hour spent debugging app conflicts is an hour not spent on product, strategy, or the next phase of growth. The same applies to technical SEO issues that compound quietly in the background until organic traffic has already taken the hit.

A Technical Founder Who Hit the Same Wall

Rob is the founder of Bespoke Glass Products. He built his own Shopify store. He is technically capable. Here is what happened next.

Rob is technically capable. He built his own applications. He still hit the ceiling. The ceiling is not about capability. It is about where individual expertise stops and accumulated cross-sector experience begins. Six Digital’s founding ethos is built around exactly that difference.

Outsourcing Shopify Is More Profitable Than Going It Alone

The argument against hiring an agency is always some version of cost. The argument for it is return. Here is what the numbers look like when the right decision gets made.

J.Lindeberg, the Swedish sportswear brand, recorded 70% revenue growth following a Shopify migration handled by specialists. Slinger, the sports equipment business, added 40% in revenue within four months of bringing in the right team. Proper technical remediation of page speed, rather than plugin-stacking, consistently produces some of the sharpest organic traffic gains available to a Shopify store without touching the content. Page speed is rarely prioritised until the traffic loss is already visible. These are not outlier results. They are what happens when real technical problems get fixed properly. The Shopify SEO and PPC case study on the Six Digital blog sets out what that looks like in practice.

Agency expertise also compounds differently than solo learning. A team working across fifty Shopify stores has seen your specific problem before. Not a version of it. Exactly it. They know which fix works, which one creates three new problems downstream, and which one looks persuasive on YouTube and breaks everything in production.

Two agencies that have never spoken to each other, a development team that hands over on a Friday and goes dark, an account manager who has not logged into the store since onboarding. These are real failure modes and they happen regularly. One accountable team, one invoice, and full visibility at every stage. Nothing moves without the client seeing it first. That is a better model, and the difference shows up in results. If the store has hit its ceiling and the problem is hard to name, get in touch and start from the diagnosis.

The Platform Is Not the Problem

Gymshark did not build a billion-pound brand alone. The Shopify platform is available to every business reading this right now. Ben Francis had access to the same tools a £200k store owner has access to today. What separated Gymshark from the thousands of fitness brands that launched in the same period and disappeared is not the platform. It is the decisions made around it, and the point at which outside expertise came in.

The ceiling is not Shopify. The ceiling is the absence of the right people working on it. Six Digital is a Shopify SEO agency that exists for exactly the point where the store has outgrown the founder’s bandwidth.