Top B2B e-commerce development agencies (and how to choose one) (2026)

A B2B e-commerce development agency builds the online store or portal your business customers order from, and connects it to the systems that hold your prices, stock, and orders. Below is SeedX, the publisher of this page, followed by eight agencies we selected using the criteria further down.

SeedX appears first because it publishes this page. Its position does not indicate a higher assessment than the other agencies. SeedX's public case studies show e-commerce development and ERP integration, but they do not detail B2B ordering features. The other eight follow in alphabetical order. We read each of their sites on October 7, 2026, and we did not hire or test any of them. Every agency, ours included, gets the same five fields. Three are facts from the agency's own site. Two, "May suit" and "Ask before you hire," are our own reading.

How we made this list

For the eight other agencies, we started from names on pages that rank for this search and searches close to it, then opened each agency's own website. An agency stayed on the list only if its site passed three tests:

1. It has a page about B2B e-commerce builds, not only consumer stores.
2. It names the platforms it builds on.
3. It names at least one B2B client.

The tests show an agency is eligible. They do not show it is better than one we left out. Two limits apply to everything below:

• A named client shows a relationship. It does not prove the agency built that client's ordering system.
• We left out most result figures the agencies quote. They measure different things over periods we could not see, so they cannot be compared.

SeedX was not screened with these tests. It is listed because it publishes this page, and its entry uses only what its own site shows.

Before you shortlist anyone, open the page linked in its profile and check that the work shown looks like your project.

SeedX and eight screened agencies

SeedX (publisher of this page)

• Platforms it names: Shopify on its documented e-commerce project, with NetSuite as that project's ERP. A separate project that is not e-commerce uses WordPress.
• What it says it builds: e-commerce websites, custom website design and development, and integrations with CRMs, payment gateways, and other business tools.
• Work and clients on its Solstice Medicine case study: a Shopify store integrated with NetSuite ERP, in English and in Traditional and Simplified Chinese, for a wholesale business expanding into direct-to-consumer sales. The case study does not describe B2B ordering features. Its case studies also show The Millennium Alliance, a B2B events business, where the work was not e-commerce: three websites merged into one WordPress site connected to Salesforce and Pardot.
• May suit: a business that wants e-commerce development and marketing from one provider. Confirm the B2B ordering features you need before hiring.
• Ask before you hire: whether a past project included B2B ordering features, which ones, and whether a client with similar needs can give you a reference or a demonstration.

Americaneagle.com

• Platforms it names: Shopify, BigCommerce, OroCommerce, Adobe Commerce, Salesforce, Sitecore, and others.
• What it says it builds for B2B: ERP and product data integration, punchout catalogs, customer-specific pricing and catalogs, approval workflows, and quotes.
• Work and clients on its manufacturing and distribution page: Cowles Custom Products, where it says it replaced a mostly manual order entry process with an automated one. It also names Berlin Packaging, State Electric Supply Co., and John Bean Technologies as clients.
• May suit: a manufacturer or distributor that has not chosen a platform and wants an agency that works on several.
• Ask before you hire: which platform team would run your project, and who you would speak to each week.

Brilliance Business Solutions

• Platforms it names: Optimizely (it states Gold partner status), Shopify, and BigCommerce. It also names Acumatica, an ERP, and inRiver, a product data tool.
• What it says it builds for B2B: stores for manufacturers and distributors, with the store connected to the ERP.
• Work and clients on its site: a BigCommerce site for Norsland Lefse. It also names Neogen, Graphic Controls, Batteries Plus, and Gesswein as clients.
• May suit: a manufacturer or distributor whose main worry is getting ERP data into the store.
• Ask before you hire: whether it has connected your exact ERP before, and whether you can call that client.

Classy Llama

• Platforms it names: Adobe Commerce, BigCommerce, and Shopify.
• What it says it builds for B2B: customer portals for ordering, invoices, and order tracking, plus integration with CRM, ERP, and inventory systems.
• Work and clients on its B2B page: C&B Equipment and US Lumber, where it reports time saved on order handling. It also names Orbus, Bomgaars, and Ace Industries.
• May suit: a seller that wants customers to check invoices and orders without calling.
• Ask before you hire: what exactly it built for those two clients, and how the time saved was measured.

Groove Commerce

• Platforms it names: BigCommerce and Shopify.
• What it says it builds for B2B: ERP and product data on the store, bulk pricing, purchase orders, punchout, and Net-30 terms.
• Work and clients on its B2B page: it names Ballard Industrial and LA Police Gear as clients. The page does not describe the build for either.
• May suit: a manufacturer, distributor, or wholesaler moving offline orders onto BigCommerce or Shopify.
• Ask before you hire: what it built for those two clients, and what it would do if neither of its two platforms fits your pricing rules.

Human Element

• Platforms it names: Adobe Commerce (it states Adobe Silver Solution Partner status), Shopify Plus, BigCommerce, Shopware, Sana Commerce, and Znode.
• What it says it builds for B2B: custom and tiered pricing, quotes, custom catalogs, and ERP integration.
• Work and clients on its B2B page: it names Young Trucks and Pentair as clients.
• May suit: a company that sells to both businesses and consumers. Its site names that group.
• Ask before you hire: how many B2B stores it has launched on your chosen platform in the last two years.

OuterBox

• Platforms it names: BigCommerce, Shopify, Magento, and WooCommerce.
• What it says it builds for B2B: account-based pricing and logins, quote request paths next to the cart, product configurators, ERP and product data integrations, and payment terms.
• Work and clients on its B2B page: a custom e-commerce site with product filtering for A&C Plastics, and a quick-quote form for TIE Industrial.
• May suit: an industrial seller whose buyers often ask for a quote instead of checking out.
• Ask before you hire: which platform it would put you on and why, since it also builds custom sites.

Shero Commerce

• Platforms it names: Shopify for B2B (it states Shopify Platinum Partner status). Its site also names BigCommerce, Magento, and WooCommerce.
• What it says it builds for B2B: company accounts, customer catalogs, net payment terms, and ERP integration on Shopify.
• Work and clients on its Shopify B2B page: it names STX, JustRite, Benchmade Knife Company, Alto Music, and Gen Y Hitch as clients.
• May suit: a seller that has already decided on Shopify for B2B.
• Ask before you hire: which Shopify B2B features it has set up for those clients, and which needed custom work.

Xngage

• Platforms it names: Optimizely (it states Gold partner status), Znode, BigCommerce, OroCommerce, and Virto Commerce.
• What it says it builds for B2B: e-commerce sites with ERP integration for manufacturers, distributors, and wholesalers. It says it works only with these three groups.
• Work and clients on its B2B implementation page: Werner Electric, a catalog it says holds more than a million products. It also names Van Meter, Guest Supply, Mayer Electric, and EIS.
• May suit: a manufacturer or distributor with a very large catalog.
• Ask before you hire: how it decides between Optimizely and the other platforms it names.

When you contact agencies, send each one the same short brief: your current platform, your ERP, the buying steps you need (pricing rules, approvals, quotes, terms), what has to be moved from the old system, and when you want to launch. Add a budget range if you have one. The same brief gets you answers you can compare.

Pick the two or three whose platforms and shown work look most like your project, and send each the same brief plus the question under its name.

What a B2B e-commerce development agency does

These are the common parts to consider when scoping a build for B2B e-commerce. Your project may not need all of them.

• The store or portal. The site your customers log in to, on a platform such as Shopify, BigCommerce, Adobe Commerce, or Optimizely. Our B2B e-commerce platform comparison lists published prices, described B2B features, and details to confirm with vendors.
• Account rules. Each customer sees its own prices and catalog. Buyers can ask for a quote, send an order to a manager for approval, or pay on terms such as Net-30.
• ERP integration. An ERP is the system that holds your stock, prices, customers, and orders. The agency connects it to the store so both show the same numbers.
• Product data. Some agencies also connect a PIM, a single place where product details are kept and sent to the store.
• Punchout. Some large buyers shop from inside their own purchasing system. Punchout lets them open your catalog there and sends the cart back to that system for approval.

Several agencies here, SeedX among them, also sell design and marketing. Those are separate jobs. An agency can be strong at the build and have no marketing team, and the reverse.

Mark which of these parts your project needs, then ask each agency who owns each one.

How to choose a B2B e-commerce development agency

The checks below follow the six criteria in Netguru's guide to B2B e-commerce agencies. (Netguru) The questions and warning signs are worded by us. Put the same six to every agency so the answers can be compared.

Two more questions belong with every agency. Who handles data migration, testing, launch, and support afterward, and what has to work before you accept the project? And where are the people on your project based?

Then call a reference. Ask that client for specifics: how the agency communicated, how changes to scope were handled, and what support looked like at launch.

The same questions put to each agency give you answers you can lay side by side.

About SeedX

We design and build e-commerce stores as well as market them. Our Solstice Medicine project is a Shopify store connected to a NetSuite ERP for a wholesale business expanding into direct-to-consumer sales. Our B2B e-commerce work also covers what brings buyers to the store: product and category SEO, paid media aimed at business buyers, and email to trade accounts.

If your project needs company accounts, negotiated pricing, approvals, or a link to your buyers' purchasing systems, ask us to show comparable work before you decide, as you would with any agency here.

If you want one team for your B2B store and the marketing around it, tell us about your project.

Whichever agency you choose, send it the same brief and ask it the same questions as the others.

Frequently asked questions

Which B2B e-commerce development agencies are the best?

There is no single best one, because the answer changes with your platform, your ERP, and the way you sell. The eight screened agencies on this page show B2B e-commerce work and named clients on their own sites. SeedX, the publisher, is profiled with the same fields. An agency that has done a project like yours, and lets you speak to that client, has earned a place on your shortlist. The team it assigns, the scope, the support, and the cost decide the rest.

What is the difference between a B2B e-commerce development agency and a marketing agency?

A development agency builds the store and connects it to your systems. A marketing agency brings buyers to it through search, ads, and email. Some firms, SeedX included, do both.

Should we build in-house or hire an agency?

Look at who you have. If your team includes developers who know your platform and your ERP, and the store will keep them busy after launch, in-house can work. If you need those skills mainly for the build, an agency can supply the people for the project. Who maintains and supports the store afterward still has to be agreed either way.

Does the agency need to be a certified platform partner?

Check two things: whether your own purchasing rules ask for it, and whether the platform requires a partner for what you are buying. A partner level shows the platform company recognizes the agency. Each company sets its own levels, so a "Gold" from one is not the same as a "Platinum" from another, and none of them shows the agency has done B2B work like yours.