May 29, 2026

The 9 Best Ecommerce Website Design Agencies

Q: What is an ecommerce website design agency?

An ecommerce website design agency is a provider that specializes in designing and building online stores, rather than generic websites or mobile apps. The best ecommerce website design agencies combine UX design, web development, search engine optimization, and conversion rate optimization to build high-performing ecommerce sites that drive sales. Some specialize in a single ecommerce platform like Shopify, Shopify Plus, BigCommerce, Magento, or WooCommerce on WordPress, while others work across multiple platforms or build custom headless commerce solutions.

Q: How is an ecommerce development agency different from a Shopify expert or freelancer?

An ecommerce development agency typically brings a full team across UX design, front-end, back-end, content management system integration, and digital marketing, while a Shopify expert or freelancer usually offers theme customization or smaller-scope builds. Many individual freelancers and platform experts lack the strategy, design systems, and project management depth needed for a full website redesign or a complex e-commerce development project. That makes a full-service ecommerce design agency a better fit for mid-market brands and high-growth startup ecommerce stores.

Q: How much does an ecommerce website redesign cost?

Ecommerce website design pricing varies widely based on platform, scope, design systems complexity, and whether the engagement includes ongoing marketing strategies or just the build. A Shopify storefront redesign for a small DTC brand sits at a very different price point than a multi-country Magento or headless commerce build for an enterprise. The best path is to ask each agency for a detailed scope and a transparent pricing model tied to your business goals, rather than relying on industry averages. Big Human provides upfront estimates on both timeline and budget. Reach out to start the conversation.

Q: Which ecommerce platforms do design agencies typically work with?

The most common ecommerce platforms are Shopify and Shopify Plus, BigCommerce, Adobe Commerce (Magento), and WooCommerce on WordPress. Larger and more complex projects increasingly use headless commerce and composable stacks like commercetools. Agencies often specialize in one or two platforms, so match your platform choice to your shortlist before evaluating individual e-commerce web design companies.

Q: What does the design process look like for an ecommerce website?

Most ecommerce web design agencies move through discovery, UX design and information architecture, visual design and design systems, front-end and back-end development, content and CMS setup, QA, and launch. After launch, strong agencies stay on for conversion rate optimization and ongoing improvements to checkout, product pages, load times, and mobile-first usability. The exact shape and duration vary by agency and project scope, and most credible agencies will tailor the design process to your business goals rather than running a one-size-fits-all template.

Q: How long does an ecommerce website redesign take?

Project duration depends heavily on scope, platform, and team capacity. A focused Shopify storefront redesign for an existing brand moves faster than a multi-region Magento replatform or a headless commerce build. Most credible agencies will give you a project plan with phase-level milestones during scoping, rather than committing to a fixed timeline before discovery is complete. Big Human provides timeline estimates in the consultation process. Reach out for a quote.

Q: What should I look for in a strong ecommerce design agency portfolio?

Look for named brands you recognize, real case studies with specifics on the work done, before-and-after evidence of conversion rate or rankings improvements, and partnerships with credible ecommerce platforms. Be skeptical of portfolios that only show generic mockups, vague "online presence" claims, or unnamed clients. The best ecommerce website design agencies are explicit about their case studies, the platforms they used, and the metrics they helped move.

Q: How do agencies approach SEO and CRO for ecommerce sites?

Strong agencies treat SEO, conversion rate optimization, and digital marketing as part of the build, not afterthoughts. That typically means structured data, mobile-first architecture, fast load times, well-architected product pages, and clean URL structure. Most agencies also integrate email marketing, PPC, and social media channels into the launch plan, with CRO often continuing post-launch as a retainer focused on the checkout, product pages, and the highest-impact conversion funnels.

The 9 Best Ecommerce Website Design Agencies

The right ecommerce website design agency does more than build a pretty online store. They translate your brand into a high-performing ecommerce website that drives sales, ranks well in search engine optimization, and stays scalable as your business grows. Whether you're launching a new direct-to-consumer brand on Shopify, re-platforming a legacy Magento storefront, or moving toward headless commerce, the agency you pick will shape your customer experience for years.

This guide highlights nine of the best ecommerce website design agencies in the world. Some specialize in Shopify Plus; others lead with BigCommerce, Adobe Commerce, or composable solutions. As online shopping habits keep shifting toward mobile-first commerce and AI-powered personalization, the bar for ecommerce sites has moved with them. The agencies on this list reflect where strong ecommerce talent lives globally, and how to find a partner with the right regional and platform fit for your business goals.

How We Picked This List

We focused on ecommerce web design companies that meet a few specific criteria. Each agency has a verifiable portfolio on their own site, with named clients and live case studies rather than generic mockups. Each has a clear platform specialization, whether that's Shopify, Shopify Plus, BigCommerce, Magento, WooCommerce, headless commerce, or a composable stack. And each agency has been operating long enough to have shipped real ecommerce sites at scale, not just MVPs or theme tweaks. We also looked for variety in service shape. Some are pure design-and-development providers; others bundle in digital marketing, CRO, email marketing, social media, PPC, and ongoing project management.

We're an ecommerce website design agency ourselves, so we built this list with the perspective of practitioners.

1. United States: Big Human (New York)

Big Human is a full-service ecommerce website design agency in New York City, founded in 2010. The team of 35 designers, engineers, and strategists builds high-performing online stores on Shopify, BigCommerce, and custom stacks, with a data-driven approach that unifies ecommerce strategy, UX design, web development, SEO/AEO, and digital marketing under one roof. Big Human's anchor ecommerce client is Rockefeller Center, where the agency has been the digital partner of record since 2021. The team overhauled the entire backend ticketing system, redesigned the checkout flow with a multi-product Add to Cart, and launched new ticket tiers like the All-In Pass that drove significant year-over-year revenue growth. The site is now localized in nine languages. Companion editorial work on The Center Magazine drove a 230% increase in organic search traffic from 2022 to 2024, earning a Shorty Award for Best Blog and a Digiday Media Awards finalist nod.

The agency's ecommerce range stretches across DTC and B2B. For 1800Wheelchair, Big Human rebuilt the brand and ecommerce experience for a 1,200-product mobility retailer that has served more than one million customers, with a custom configurator UI for wheelchair personalization, a reworked checkout, and an accessibility-first, mobile-first design system. Other commerce and commerce-adjacent partnerships include Graduate Hotels, Carnegie Hall, Chelsea Piers, Fusion Worldwide (B2B electronics distribution), Quinn, and TodayTix Group.

Big Human's clients often stay for years, not one-off projects (although they can do that, too). Biweekly post-launch optimization, ongoing CRO, and full-funnel growth marketing are baked into the engagement model rather than tacked on as retainers.

Contact: Reach out to Big Human to chat about your project.

Best for: mid-market and enterprise brands looking for a single partner across ecommerce strategy, UX design, custom web development, and ongoing growth marketing, with proven work across ticketing, DTC, and B2B commerce.

2. United Kingdom: Charle Agency (London)

Charle Agency is a London-based Shopify and Shopify Plus specialist with a bent toward CRO, SEO, and retention. The team positions itself as a "Search-First Shopify agency," which translates to a design process where rankings, load times, and product pages are baked into the build from day one rather than bolted on later. Named clients include 111SKIN, Cambridge Satchel, Billionaire Boys Club, Muc-Off, Gilbert Rugby, Royal Museums Greenwich, Hippeas, Candy Kittens, and Rude Health.

Charle's Shopify-only focus means you get deep platform expertise rather than a generalist's web design services, and the team's CRO and retention practice often continues post-launch.

Best for: ecommerce stores that need to compete on organic search, with priorities around rankings, conversion rate, and mobile-first performance.

3. Sweden: Vaimo (Stockholm)

Vaimo is a Stockholm-headquartered ecommerce development agency built around composable commerce. The team is one of the largest Adobe Commerce (Magento) implementation providers in Europe, with deep practices in commerce tools and Akeneo PIM. Named clients include Carhartt WIP, Helly Hansen, Byredo, Bunzl, BAUHAUS, and Swiss Sense.

Vaimo's positioning sits at the enterprise end of the market, with significant B2B work and a strong PIM and data layer practice that suits ecommerce sites with large product catalogs. The team's services span ecommerce platform implementation, UX design, marketing strategies, and ongoing optimization.

Best for: mid-market and enterprise brands evaluating Adobe Commerce, headless commerce, or composable storefronts rather than off-the-shelf Shopify.

4. Netherlands: Yellowgrape (Amsterdam)

Yellowgrape is an Amsterdam-based, AI-powered ecommerce agency that combines Shopify design and web development with growth marketing. The team operates from Amsterdam with a second office in Berlin and focuses on European DTC brands. Named clients include Amac, XXL Nutrition, and Pretty Orange.

The agency's approach blends Shopify design and web development with PPC, email marketing, social media, and conversion rate optimization, making it a fit for European online stores that want a single partner across the customer journey. Yellowgrape leans into data-driven experimentation and post-launch metrics.

Best for: European DTC brands that want a single partner spanning Shopify design, paid media, and ongoing CRO rather than a one-off website redesign.

5. Germany: dotSource (Jena)

dotSource is one of the largest digital commerce agencies in the DACH region, headquartered in Jena. The team works across Adobe Commerce, Salesforce Commerce Cloud, SAP Commerce, and commercetools, with strong B2B and B2C practices. Named clients include BADER, hessnatur, Bogner, Ottobock, KWS Group, BayWa, Villeroy & Boch, ROSSMANN, Würth, C.H. Beck, and Lampenwelt. dotSource's strengths are enterprise-grade ecommerce solutions, CRM, PIM, and content infrastructure. The agency's service shape favors large brands and B2B distributors that need a partner to streamline complex catalog data, multi-region storefronts, and platform integration across multiple stacks.

Best for: enterprises and B2B distributors with complex catalogs, multi-region storefronts, or specialized B2B functionality.

6. France: Smile (Paris)

Smile is a Paris-headquartered open-source IT services group with offices across France and Europe, and an ecommerce practice focused on Adobe Commerce, PIM, and headless approaches. The group owns SensioLabs, the company behind the Symfony PHP framework, which gives the team unusual depth on the back-end side of e-commerce development. Named clients include Snowleader, Somfy Group, Dunlop Protective Footwear, Azelis, and UNESCO.

Smile's scale (over 2,000 staff across Europe and North Africa) puts it in a different category than boutique design shops. If you're evaluating ecommerce platforms beyond Shopify and want a partner who can handle deep back-end, CMS, and website development work, Smile is a solid candidate.

Best for: enterprises looking for an open-source-friendly ecommerce partner with B2B credentials, complex integrations, and pan-European delivery.

7. Canada: Diff Agency (Montreal)

Diff Agency is a Shopify Plus specialist headquartered in Montreal, and one of the most decorated Shopify Plus partner agencies globally. Now part of WPP, the team works with ambitious DTC and lifestyle brands across North America. Named clients include Tommy John, Hill's Pet Nutrition, Tonies, PopSockets, Boll & Branch, Sakara Life, Giant Tiger, DAVIDsTEA, Rudsak, and Kith. Diff's strengths are Shopify Plus theme architecture, design systems, checkout customization, and high-performing storefronts for brands at scale. The team handles ecommerce web design, project management, conversion rate optimization, and post-launch growth.

Best for: DTC and lifestyle brands that have outgrown a basic Shopify theme and want a partner with a deep portfolio of Shopify Plus redesigns and replatforms.

8. Australia: Convert Digital (Melbourne)

Convert Digital is a Melbourne-based ecommerce agency working primarily on Shopify Plus and commercetools, with some BigCommerce experience as well. The team serves Australian DTC and lifestyle brands almost exclusively. Named clients include Ghanda, Aje Collective, Boody, Henne, Thankyou, Koko Black, Naked Harvest, 2XU, Milligram, and Sarah & Sebastian. The agency's focus is the full Australian retail and DTC market, with a strong design process and clear emphasis on usability, user-friendly mobile-first builds, and ongoing optimization. Convert Digital has the regional expertise and platform partnerships to deliver scalable ecommerce solutions across APAC.

Best for: DTC and lifestyle brands selling in Australia or APAC that need a Shopify Plus or BigCommerce partner with deep local expertise.

9. Japan: TAM Inc (Osaka)

TAM Inc is an Osaka-based ecommerce and creative development agency with around 160 staff and a 30-year track record building for major Japanese brands. The team's ecommerce practice covers strategy, UX design, design systems, and full ecommerce platform implementation, with content management system and cloud integration capability. Named clients include Kaiyukan (Osaka Aquarium), Suntory Holdings, Keio Electric Railway, Calbee, Okamura, and Gentosha.

TAM operates almost entirely in the Japanese market, with deep Japanese-language UX, integration with local payment and logistics providers, and partnerships with major Japanese brands.

Best for: international brands considering a Japan-specific ecommerce site, or Japanese brands looking for a creative-and-development partner with local UX depth.

How to Choose an Ecommerce Website Design Agency

Picking an ecommerce web design agency comes down to four practical questions.

First, does their platform expertise match your stack? A Shopify Plus partner is not the same as a Magento implementation specialist, and asking a Shopify-only shop to deliver a complex headless commerce build can stall a project before it starts. Look at the named ecommerce platforms in their case studies before anything else.

Second, do their case studies look like your business? An agency that has only built DTC storefronts for $5M brands will struggle with a $200M B2B catalog migration, and vice versa. Compare the size, complexity, and shape of their ecommerce sites to what you're trying to build.

Third, is their service shape right? Some agencies stop at design and development; others bundle in digital marketing, conversion rate optimization, email marketing, PPC, social media, and ongoing project management. Figure out what you need post-launch before you sign.

Fourth, what's their approach to pricing and partnerships? Strong agencies are transparent about scope, retainers, and how they handle a redesign or expansion later. Be wary of providers who can't explain their pricing model clearly, or who lean on vague AI-powered "transformation" language without specifics.

Ready to Talk About Your Ecommerce Project?

If you're considering an ecommerce website redesign or building a new online store from scratch, Big Human's New York team has partnered with brands like Rockefeller Center and 1800Wheelchair on full-service ecommerce builds spanning Shopify, BigCommerce, and custom stacks. See our ecommerce work or get in touch to talk through your project.