Best Shopify Agencies for Fashion Brands in the US (2026)

The best Shopify agencies for a fashion brand in the US are the ones that have already built stores for clothing labels: they know size guides, colour variants, lookbooks, drops and returns, not only themes and apps. This list ranks ten US agencies with a real fashion portfolio on Shopify, says where each is based, its Shopify partner status, the fashion brands it has worked with, and which kind of brand it suits best. Updated November 2026.

The ten agencies at a glance

How we chose

Every agency on this list meets three criteria, checked on its own website and in the Shopify Partner Directory in November 2026:

1. 1.It is based in the United States.
2. 2.It shows real fashion or apparel work on Shopify, with clothing, footwear or accessories brands named on its site.
3. 3.It holds a Shopify partner status, or presents itself as a Shopify Plus agency.

The order weighs how much of the portfolio is fashion, how well-known those fashion clients are, and the partner tier. We did not use team sizes, client counts or prices: they are rarely published, and a figure we cannot check on the agency's own page is not in this article. The list is reviewed when an agency's status or portfolio changes.

What Shopify partner tiers mean

Shopify ranks the agencies in its partner program in tiers based on the stores they build and the business they bring to the platform. Platinum is the highest, followed by Premier, Plus and Select. A Shopify Plus agency builds on Shopify's enterprise plan. The tier tells you an agency ships a lot of work on Shopify; it does not tell you whether that work is fashion. That is why the client list matters as much as the badge.

1. Domaine

Domaine works from Los Angeles and New York, with an office in Amsterdam, and shows a Shopify Platinum Partner badge. Its fashion and apparel projects include Oscar de la Renta, Karl Lagerfeld, Ulla Johnson, Tuckernuck, Moose Knuckles and Psycho Bunny: store locators, shop the look, appointment booking and custom size charts are the kind of features on those builds. Best for an established label that sells in several countries and needs multi-currency, multilingual stores. domaineworldwide.com

2. Avex

Avex is a New York agency that presents itself as a Platinum Shopify Plus agency. Its work page lists Khaite, Kith, Hugo Boss, Marchesa, LoveShackFancy, Brandon Blackwood, Fila and Kit and Ace, with projects that range from full migrations to UX design and A/B testing. Best for a fashion or streetwear brand that wants the design of the store and its conversion rate handled by the same team. avexdesigns.com

3. Roswell NYC

Roswell NYC is a New York agency and Shopify Platinum Partner that works with beauty, fashion, jewelry and luxury merchants. Its case studies include Diane von Furstenberg, Jones New York, Misook and Brixton. Beyond the build, it offers photography, retention marketing and paid media. Best for a brand that wants one agency for the store and for what brings customers back to it. roswell.nyc

4. Sweden Unlimited

Sweden Unlimited is an independent, female-founded agency in New York and a Shopify Premier Partner. It has spent more than twenty years on digital work for fashion, beauty and luxury brands, and its Shopify work includes Mansur Gavriel, Quince and CNCPTS. The team is small and senior-led, and handles branding, content and development together. Best for a design-led luxury brand that wants the people who think about the brand to be the ones who build the store. swedenunlimited.com

5. Alleyoop

Alleyoop is a Los Angeles Shopify Plus agency founded in 2019 for fashion, luxury and lifestyle brands, working remotely with its clients. Its work includes Cherry, EB Denim, The Elder Statesman, Venroy, Mimchik and Rock Revival, often covering strategy, design, development and email automations. Best for a growing fashion label that wants a senior team without the layers of a large agency. alleyoopco.com

6. Anatta

Anatta is based in Austin, has been a Shopify Plus Partner since 2014 and a Shopify Platinum Partner since January 2025. Its fashion and apparel clients include Vuori, Rothy's, Mack Weldon, BRUNT Workwear and Stio. Its focus is engineering: migrations from other platforms, integrations with ERP and order systems, and conversion testing. Best for an apparel brand that is scaling fast or moving off another platform. anatta.io

7. SLTWTR

SLTWTR is a design and development firm in Santa Barbara, California, listed as a Platinum partner in the Shopify Partner Directory. Its case studies are close to one family of brands: Billabong, Quiksilver, Volcom and Roark, including migrations from another commerce platform to Shopify and multi-brand architecture. Best for surf, outdoor and lifestyle apparel groups that run several brands at once. sltwtr.com

8. BlueSwitch

BlueSwitch is a New York agency that presents itself as a Platinum Shopify Plus agency for large B2B and direct-to-consumer projects. Its clients include Perry Ellis, Ted Baker, Lord & Taylor and TYR. It builds its own B2B tools on top of Shopify for ordering, onboarding and inventory. Best for a fashion brand that sells to retailers and to consumers and wants both on one platform. blueswitch.com

9. XgenTech

XgenTech was founded in New York in 2012 and is a Shopify Partner working in fashion and apparel, beauty and wellness. Its fashion clients include Naeem Khan, Figue, Miguelina and Hirshleifers, with work on lookbook layouts, size guides, visual merchandising and multi-currency checkout. Best for a smaller luxury or eveningwear label that needs a store built around its collections. xgentech.net

10. Solo Media Group

Solo Media Group is a Shopify Platinum agency with offices in New York, Los Angeles and Miami. Its featured clients include Huk and Bianca Censori, alongside beauty and consumer brands. It pairs brand design with engineering, retention and subscriptions in one team. Best for a brand that wants its identity and its store built by the same people. solomediagroup.com

How to choose a Shopify agency for a fashion brand

Look at their fashion work, not their badge. Ask for two or three fashion stores they built and open them on your phone: how the size guide works, how colour variants switch the photos, how fast a collection page loads.

Match the agency to your stage. A label with its first collection needs a clean theme, good product pages and a launch. A brand with wholesale accounts, several countries or a legacy platform needs engineering. The agencies above are not interchangeable on that point.

Ask who will do the work. Many agencies sell with senior people and build with junior ones. Ask who your day-to-day contact is and who writes the code.

Ask what happens after launch. Most of a fashion store's work comes after it goes live: new drops, seasonal campaigns, new product photos for every colourway. Ask how they handle ongoing support and what it costs.

Have your product content ready. An agency builds the store; it rarely makes the product photos. Plan who produces the on-model images, the colourway shots and the videos before the build starts. If you need them in volume, an AI tool such as our Shopify app creates on-model photos and videos from your product images and publishes them to your product pages.

Watch for red flags: no fashion store in the portfolio, a fixed price before they have seen your catalogue, and no clear owner of the code and theme after the project ends.