The 8 Best Ecommerce Development Agencies in the USA (2026)

The short answer: Codal holds the strongest dual-platform position, Shopify Platinum Partner and BigCommerce Elite Partner at once. OuterBox is the strongest for scale at 300+ staff and twenty years. Groove Commerce has the deepest lifecycle stack. We Make Websites is the strongest pure Shopify Plus design shop. FactoryJet is eighth and we explain why below.

Start with partner tier. It is the only claim here you cannot buy.

Almost every roundup on this topic ranks agencies on adjectives. There is a much faster filter, and it is publicly verifiable in about two minutes.

Platform partner tiers are earned on delivered volume and client outcomes, not on a subscription. Shopify Platinum, BigCommerce Elite, Klaviyo Master Elite and HubSpot Diamond are all awarded by the platform vendor and published in that vendor's own searchable directory. You can check any agency's current tier without asking the agency.

That matters for two reasons. An agency claiming deep Shopify expertise with no partner status has either never delivered the volume or has lost the tier. And higher tiers usually come with faster escalation paths at the platform, which is worth a great deal at 2am when checkout is down.

One caution: check the directory, not the badge on the agency's website. Tiers lapse, and website badges frequently do not.

Which page do you actually need? This one ranks agencies on their ability to BUILD, which is why platform partner tier leads it. If your store already exists and the problem is that nobody finds it, our ecommerce SEO agency roundup ranks a partly different set on technical SEO capability instead. If you have decided to hire for a build and want scope and terms, go to our ecommerce development service page.

Disclosure, up front: FactoryJet is on this list, at number eight. Everything said about the other seven was fetched from their own websites on 7 September 2026 and is quoted or attributed. Nobody paid to appear.

The eight compared

The eight reviewed

1. Codal, best dual-platform and enterprise position

Chicago headquartered with offices in Lincoln, Ahmedabad and Toronto. It holds the strongest partner stack on this page: Shopify Platinum Partner and BigCommerce Elite Partner simultaneously, plus AWS Advanced Tier and Contentstack Preferred Partner, which together describe a genuine composable commerce practice rather than a claimed one.

Client work is enterprise-shaped: Charles Schwab ("Simplifying financial compliance for 1.8 million clients"), Thermos, Cost Plus Drugs, Flexport, and Origin USA where it reports "Driving $3.31M in additional sales".

Consider it if you are weighing Shopify against BigCommerce and want an agency with no reason to push you either way. Look elsewhere if you are a small store, because this is enterprise-shaped work.

2. OuterBox, best for scale and ecommerce SEO

Founded in 2004 with offices in Akron, Houston and Rochester, stating "more than 300 digital marketing experts" and twenty years in ecommerce. Published claims include "1000+ Successful Client Partnerships" and "2M+ Page #1 Google Rankings", with Lowe's, JEGS, Sur La Table, Matco Tools and Golfballs.com among clients. Google Premier Partner for 2026 and a Microsoft Advertising Select Partner.

Its ecommerce SEO practice is the notable part. Ecommerce SEO is a different discipline from content SEO, mostly faceted navigation, product schema and category architecture, and few agencies at this size run it as a named specialism.

Consider it if you have a large catalogue and organic search is the growth channel. Look elsewhere if you want a boutique relationship.

3. Groove Commerce, best lifecycle and retention stack

Founded 2007, headquartered in Baltimore with Philadelphia, Austin and Orlando locations. The partner combination is what distinguishes it: BigCommerce Elite, Klaviyo Master Elite and HubSpot Diamond. That is a retention and lifecycle stack, not a build-only one, which matters because most ecommerce agencies hand you a store and leave the repeat-purchase problem with you.

States "Trusted by 100+ eCommerce Merchants" with US Open Shop, Dippin' Dots, GE, NASA Official Gear and Cutter & Buck named. Published results include a 47% revenue increase for Dippin' Dots and 409% ROAS for Cordova Outdoors. B2B ecommerce is a named service.

Consider it if repeat purchase matters as much as acquisition, or you are B2B on BigCommerce. Look elsewhere if you only need a build.

4. We Make Websites, best Shopify Plus design shop

Shopify Partners since 2011, with London and New York offices, now a Tech Mahindra company. The client list is the strongest brand roster here: Good American, UFC, Levi's Dockers, Toteme, Condé Nast, Hasbro, HP and Vollebak. Services include "Headless & Composable Commerce" and "Internationalization", with work recognised by Awwwards and CSS Design Awards.

Consider it if design quality is the point and you are on Shopify Plus. Look elsewhere if you need BigCommerce or Magento depth.

5. Inflow, best ecommerce-only performance agency

Founded 2007 with Denver and Tampa locations, and notable for working exclusively with ecommerce brands across SEO, PPC, paid social and CRO. States "130+ Years Combined Industry Experience" and "$7 Million+ Media Managed", with America's Test Kitchen, Mountain House, Simms Fishing and KEH Camera among clients.

Published results are specific: 413% increase in ad revenue year on year for KEH Camera, 126% organic traffic growth for Simms, and a "First $1 Million Month" for Vitrazza. It is a Google Premier Partner, a Buy With Prime Agency Partner and holds a Clutch Top Digital Marketing Company award as a women-owned business.

Consider it if your store is built and the problem is growth. Look elsewhere if you need the build itself.

6. 1Digital Agency, best mid-market across four platforms

Founded 2012 in Philadelphia, working across Shopify, BigCommerce, WooCommerce and Magento, stating "50+ eCommerce specialists" and "400+ brands" served. Its review position is the most transparent on this page: "4.9/5 rating across 941+ verified reviews" aggregated across Google, Trustpilot, Clutch and Facebook, which is a far more checkable claim than a single-platform score.

Published results are given with engagement length attached, which is unusually honest: "+471.2% Online revenue growth over a 24-month engagement" and "+131.3% Annual revenue lift over a 2-year engagement".

Consider it if you are mid-market, especially on Magento or WooCommerce where fewer strong agencies remain. Look elsewhere if you need enterprise composable work.

7. SmartSites, best for build plus paid media

States "900+ Websites Launched" and "$100M+ Client Revenue Generated", with an unusually complete accreditation set: Google Premier Partner, Microsoft Advertising Select Partner 2025, Meta Business Partner and Amazon Ads Verified Partner, plus Inc. 5000 recognition and a BBB A+ rating.

Consider it if you want the store and the paid acquisition from one team. Look elsewhere if you want deep single-platform commerce engineering.

8. FactoryJet, for brands wanting the build and AI search together (disclosure: this is us)

Unlike our other roundups, this is the category where we are genuinely on home ground rather than adjacent to it. Commerce is the majority of our work, DTC and B2B.

We are still eighth, because on published track record the seven above are ahead. OuterBox states 300+ staff. 1Digital states 400+ brands and 941 verified reviews. Codal holds Shopify Platinum. Those are real and we are not going to talk around them.

What we add is narrow and current: we build stores to be cited by AI answer engines, not only to rank, because we measure what actually earns citations rather than guessing at it. Most commerce agencies treat that as a future problem. Month-to-month, founder on the account. Scope is on the ecommerce development service page, and if you are B2B specifically, the B2B ecommerce page covers that ground.

Consider us if you want the build and AI search visibility as one project. Look elsewhere if you want Shopify Platinum with enterprise references, which is Codal, ranked first here for that reason.

Two agencies we could not verify, and left out

Worth stating plainly because one of them outscored everybody.

Coalition Technologies was named in 6 of our 12 AI engine answers, the highest score on this test. Absolute Web scored 4 of 12. Both websites returned an HTTP 403 to our fetch on 7 September 2026, so we could not verify a single claim about either.

We left them out rather than describe them from memory or repeat what other roundups say about them. That rule cost us the top scorer on this page. We think a list where every entry was actually checked is worth more than a longer list where some were not, and you can now weigh that decision yourself rather than wonder why a name you expected is missing.

Methodology

Run on 7 September 2026 and repeatable. We asked ChatGPT (gpt-5.6), Claude (Sonnet 5), Gemini (3.8 Flash) and Perplexity (Sonar Pro), each with live web search enabled, to recommend US ecommerce agencies across three phrasings: development agencies, ecommerce SEO agencies, and "which agency should I hire to build and grow my Shopify store". Twelve answers. Coalition Technologies scored 6 of 12; SmartSites 5; Absolute Web, Codal, WebFX and OuterBox 4; Americaneagle, Blue Acorn iCi, 1Digital, Inflow and We Make Websites 3; Groove Commerce and Mobikasa 2.

We then pulled the live US Google results for the head terms, and fetched each shortlisted agency's own website, recording only claims stated there. Where a site does not state a founding year or team size, we left it out rather than estimate it. Two agencies returned HTTP 403 and were excluded, named above.

Nobody paid to appear. No review scores were invented. Where we place ourselves, we say so in the sentence rather than a footnote.

Sources

• Codal, partner tiers, offices and named client results
• OuterBox, founding year, team size, rankings claim and clients
• Groove Commerce, partner tiers, merchant count and case results
• We Make Websites, Shopify partnership since 2011, offices, clients and services
• Inflow, founding year, media managed, case results and certifications
• 1Digital Agency, founding year, team size, review aggregate and results
• SmartSites, websites launched, revenue generated and accreditations

If a figure here no longer matches an agency's site, tell us and we will correct it. Everything was accurate on the date above and we would rather fix it than defend it.