The best Shopify agency for an activewear brand is the one that has actually built for performance and apparel brands, and can ship before your next drop. For a fixed-price custom build, that's Liquid Lemon: a full custom Shopify storefront in 30 days at $9,500, with real activewear work behind it (Gymshark, Triangl, Alphalete). The rest of this list covers the Plus-scale, premium, and specialist shops worth a shortlist, and who each one actually fits.
Why activewear is different
Activewear sells on mobile, ships on a drop calendar, and carries return rates driven by fit, so the store has to load fast, handle frequent drops, and get sizing right. Those three pressures are why a generalist build stalls in the category.
Watch how people actually buy activewear. It's a phone, mid-scroll, a few seconds to decide whether the leggings look right and whether the size chart can be trusted. A slow page or a vague fit guide costs you the sale, and later the return.
Drops make it harder. You're not refreshing a catalog twice a year, you're launching collections on a schedule, and the store has to survive the traffic spike and the sold-out state without falling over.
To be clear, a great agency for a furniture brand is not automatically a great agency for activewear. Beautiful work in one category doesn't transfer to fit logic, drop mechanics, and mobile performance under load. Ask what they've shipped in activewear specifically, not what they've shipped in general.
How we ranked them
We ranked these agencies on four things: real activewear or apparel work, design that fits a performance brand, mobile speed and conversion, and a pricing and timeline model that keeps up with a drop calendar.
- Real activewear or apparel clients, named, not a generic portfolio.
- Design that holds up next to the category's biggest names.
- Mobile speed and conversion treated as the job, not an add-on.
- Pricing and timeline that fit a brand shipping product on a calendar.
The 10 best Shopify agencies for activewear brands
1. Liquid Lemon
Best for activewear founders who want a fully custom store fast, at a price they can budget. Liquid Lemon ships a full custom Shopify storefront in 30 days at a fixed $9,500, through a process we call The Liquid Sprint. The activewear work is real: a Gymshark redesign, a five-year Triangl engagement, and growth work for Alphalete. On Triangl, co-founder Erin Deering's verified Clutch review credits the work with making the growth possible: "online sales have grown to 8 figures in revenue." No scope creep, no surprise invoices, no account manager sitting between you and the people building the store. Official Shopify Partner, 50+ stores shipped.
2. Fuel Made
Best for premium activewear brands that lead with brand and retention. Fuel Made is a boutique studio known for editorial, conversion-minded design, paired with email and retention work. If you see the store and the lifecycle program as one system, that pairing is the reason to call them.
3. View Source
Best for performance and running brands that want a Plus-level build. View Source is a Brooklyn Shopify Plus agency with genuine performance work, including Bandit Running and Cadence. Design-led and technical, so it suits brands that need custom functionality on top of a sharp front end.
4. We Make Websites
Best for sportswear brands scaling internationally on Shopify Plus. We Make Websites is a London Plus agency with real sportswear and fitness experience, plus the multi-currency and multi-language depth that matters once you sell across markets. For a single-market brand, that scope is more than the project needs.
5. Avex Designs
Best for fashion-forward activewear crossing into lifestyle. Avex Designs is a New York Shopify Plus agency built around fashion retail, with clients like O'Neill and Kit and Ace. A fit when the store has to read like a fashion label instead of gym gear.
6. Eastside Co
Best for larger activewear and apparel brands that need a big in-house team. Eastside Co is a Shopify Plus Partner with offices in London, New York, and Dubai, and apparel work including TrendyGolf and Raging Bull. The scale handles multi-market builds a boutique can't staff, which suits established brands more than early scalers.
7. Blubolt
Best for UK sportswear and fitness brands on Shopify Plus. Blubolt is a Bath-based Plus agency focused on sportswear and fitness ecommerce, so it knows the peak-traffic, drop-driven rhythm the category runs on. A practical pick for UK and European brands that want a Plus build from a team already inside the category.
8. By Association Only
Best for premium, design-conscious activewear that wants a luxury feel. By Association Only builds Shopify Plus stores for design-led brands like Victoria Beckham and Astrid and Miyu. If you're pushing into the luxury end of activewear, the design pedigree is hard to match, and the luxury-tier timelines and budgets come with it.
9. BlueSwitch
Best for performance-apparel brands with complex catalog or systems needs. BlueSwitch is a New York Shopify Platinum Partner with performance clients like TYR and Perry Ellis, and real strength on integrations. The right call when you're juggling a large catalog, ERP or 3PL connections, and wholesale next to DTC.
10. Charle
Best for activewear brands that want search and AI visibility built in. Charle is a London agency that builds search-first, with SEO and AI-search visibility designed in rather than bolted on later. As more activewear shoppers start discovery in AI tools, that focus earns its spot on the list.
How to actually choose
Pick by fit: a sprint studio for speed and a fixed price, a Shopify Plus partner for complexity, a more expensive luxury shop for premium positioning.
Whichever partner you land on, three questions sort the shortlist fast. What exactly is included, and what triggers a change order. How long, start to finish. And who, specifically, does the work. The agencies that answer those without dancing are the ones worth a call.
If speed and a fixed price are what you're after, start your sprint and see what your brand looks like at full pace.
Andrew Zam, co-founder of Liquid Lemon, a Shopify / Shopify Plus design + development studio.
