Best Ecommerce Development Companies in 2026: 12 Compared

The 12 top ecommerce development companies for multi-platform and B2B builds in 2026, compared on platform breadth, partner status, ERP integration depth and named work, with a decision framework that names the right company for each situation, including when it is not us.

Best Ecommerce Development Companies in 2026: 12 Compared

Last updated: November 9, 2026 · 21 min read · By Joe McFerrin, CEO of IWD Agency

Most ecommerce development companies can launch a storefront. Far fewer can tell you which platform the store belongs on, sync contract pricing from the ERP that owns every number, and keep that integration healthy after launch. That gap decides whether a B2B or multi-platform project ships on budget or turns into a rescue, so it is what this comparison measures.

This guide profiles 12 development companies that build on more than one commerce platform, or pair commerce with the B2B and ERP depth complex catalogs need: Magento and Adobe Commerce, Shopify Plus, BigCommerce, Salesforce Commerce and composable stacks. The top ecommerce development companies for this work range from full-service shops with 500+ staff to boutique optimization teams, so every profile ends with who the company is right for, including when that is not IWD.

Disclosure up front: IWD Agency publishes this guide and lists itself first. Our deepest B2B and ERP proof is on Adobe Commerce, and our profile says where competitors have more launches on Shopify B2B and BigCommerce B2B Edition. Competitor facts come from the verification behind our platform guides, and partner tiers carry the date they were checked. For single-platform shortlists, see the best Magento development agencies, best Shopify Plus agencies, best BigCommerce agencies and best B2B ecommerce agencies.

The 30-Second Verdict

If you are scanning:

  • Manufacturer or distributor whose ERP is the system of record, platform still open: IWD Agency, Classy Llama, Groove Commerce
  • One vendor for commerce, hosting and marketing: Americaneagle
  • B2B strategy and architecture before any build: Zaelab
  • Global, multi-region storefronts: Vaimo
  • Product data is the real problem: Pivotree
  • Brand-led luxury, fashion or CPG: BORN Group
  • An existing Magento or BigCommerce store that needs to get faster and safer: IronPlane
  • Budget binds and you can own project management: Net Solutions
  • Escaping a legacy cart, or SMB on BigCommerce and Shopify: Optimum7, 1Digital
#CompanyBest forCompany size fit
01IWD AgencyERP-heavy B2B, platform decision still openMid-market to enterprise
02AmericaneagleFull-service enterprise deliveryUpper mid-market to enterprise
03Classy LlamaManufacturer and distributor replatformsMid-market and larger B2B
04ZaelabB2B strategy and connected commerceEnterprise
05Groove CommerceDistributors still choosing a platformLarger distributors
06VaimoGlobal enterprise B2B and B2CEnterprise
07PivotreeEnterprise commerce plus data managementEnterprise
08BORN GroupBrand-led luxury and CPG buildsEnterprise
09IronPlaneOptimization, support and rebuildsMid-market
10Net SolutionsHybrid US and India delivery valueMid-market
11Optimum7Migrations from legacy cartsSMB to mid-market
121DigitalBigCommerce B2B plus marketingSMB to mid-market

The numbers are for navigation. IWD is listed first because we publish this page, not because we have the most launches on every platform.

How to Judge an Ecommerce Development Company

Score every candidate on these six dimensions before you compare portfolios. Most failed projects trace back to a mismatch on one of them.

  1. Platform breadth with a point of view. A company certified on one platform recommends that platform every time. A company that builds on several can lose the sale on one and keep the client on another. Breadth only counts if there is named work on the platform being recommended to you.
  2. B2B feature fluency. Company accounts with buyer roles, customer-specific catalogs and price lists, quote-to-order, net terms and punchout (cXML or OCI) for procurement buyers. A team that has to look these up is learning on your budget.
  3. ERP and integration depth. In B2B the ERP usually owns pricing, inventory and customer terms. Named projects on NetSuite, SAP, Microsoft Dynamics, Acumatica, Epicor or Infor beat generic integration claims, and the integration is where budgets most often slip.
  4. Partner status, read correctly. Adobe, Shopify and BigCommerce rank partners in public directories, and tiers change. Our October 2026 BigCommerce B2B review found several agencies describing a different tier on their own sites, so check the directory yourself.
  5. Live, named work. Ask for three client stores launched in the last 24 months and check them. Magento stores expose headers such as X-Magento-Tags; BigCommerce B2B Edition stores usually load a buyer-portal script you can see in the page source.
  6. Post-launch economics. Who staffs the account after launch, where they sit, what the response commitments are, and how patching and upgrades are handled.
Ready to talk scope?

Want one team that builds on all three major platforms?

This post is a comparison guide, not our service page. If you already know you want a multi-platform partner, see how we scope and staff builds on our ecommerce development services page, or book a 30-minute assessment.

The 12 Top Ecommerce Development Companies, Profiled

Every company below builds on more than one commerce platform, or combines commerce with custom software, composable architecture or data management. Each also appears in at least one of our platform guides. Where a partner tier may have changed since we checked it, we give the date.

01. IWD Agency

IWD Agency homepage, an ecommerce development company for B2B and ERP-integrated builds on Adobe Commerce, Shopify Plus and BigCommerce
IWD Agency · iwdagency.com · Adobe Solution Partner · Shopify Plus partner · BigCommerce Elite Partner · 300+ brands since 2008

Quick stats: Building ecommerce since 2008, 18 years · 300+ brands shipped · Adobe Solution Partner, Shopify Plus partner and BigCommerce Elite Partner · Teams in Austin, Barcelona, São Paulo and Warsaw

Headquarters: Austin, Texas.

Specialties: IWD is an ecommerce development agency for B2B builds where the back office and the website have to agree on every number: company accounts, customer-specific catalogs, contract pricing read live from the ERP, quote-to-cart workflows and punchout. Our Magento agency and Adobe Commerce agency teams handle B2B builds, Hyva storefronts and Magento 1 migrations with full data continuity, and our Shopify Plus agency and BigCommerce agency practices give the platform recommendation somewhere else to land. NetSuite connectors for all four platforms come from our sister company Dominate, so integration problems cannot fall into a gap between your agency and your connector vendor.

Notable clients: Daniels Manufacturing (DMC), an aerospace and defense tooling manufacturer on Adobe Commerce B2B synced with Infor SyteLine; Penn State Extension, moved off Magento 1 onto Adobe Commerce; Purdue Extension; Marucci Sports; and Rolex. Intel, YETI, Asics and Siemens appear in our client logo row.

Honest limits: Our live Shopify B2B launch record is thinner than our Adobe Commerce B2B record. On BigCommerce we are an Elite Partner, but we do not hold the B2B Specialized certification and we have no published B2B Edition case study. If your platform is decided and you want the team with the most launches on it, our Shopify B2B and BigCommerce B2B guides name them.

Best for: Manufacturers, distributors and wholesalers whose ERP is the system of record, and companies that want the Adobe Commerce, Shopify Plus or BigCommerce question answered on evidence rather than on one agency's only skill.

Shortlisting IWD?

Talk to the team behind this guide

Senior engineers do the work. See how we approach B2B ecommerce development and ERP integration services, or book a 30-minute assessment and we will tell you which platform and which company fit your brief, even when it is not us.

02. Americaneagle

Americaneagle homepage, a full-service US agency with multi-platform enterprise commerce delivery
Americaneagle · americaneagle.com · Full-service agency · Des Plaines, Illinois

Quick stats: Web practice since 1995 · 500+ staff · Adobe Commerce Solution Partner · BigCommerce Preferred and B2B Specialized in the BigCommerce Partner Directory on October 29, 2026 (its own site says Elite)

Headquarters: Des Plaines, Illinois, with US locations that include Chicago, Los Angeles, New York and Washington, D.C.

Specialties: The vendor-consolidation option: commerce delivery plus hosting, design, 24/7 support and digital marketing under one roof, across Adobe Commerce, BigCommerce, Shopify and Sitecore-adjacent stacks. Its BigCommerce page claims 250+ BigCommerce implementations. Formal account management that procurement teams like and boutique-minded merchants can find heavy.

Named work: Berlin Packaging, a rigid packaging and industrial supplies company, sells 40,000+ products on a BigCommerce store Americaneagle built, with a proprietary ERP integrated for inventory, a customer portal showing credit limits and order history, and a quote cart for special pricing.

Best for: Enterprises that want one vendor across web, commerce, hosting and marketing. Specialists usually deliver more B2B depth per dollar.

03. Classy Llama

Classy Llama homepage, a replatform agency for manufacturers and distributors on Adobe Commerce and BigCommerce
Classy Llama · classyllama.com · Springfield, Missouri · Adobe Commerce and BigCommerce

Quick stats: Working with Magento since 2007 · 100+ specialists · Adobe Commerce Solution Partner · Listed as Classy Llama Studios in the BigCommerce Partner Directory: Preferred, B2B Specialized and BigDev Certified on October 29, 2026

Headquarters: Springfield, Missouri.

Specialties: Manufacturing and distributor replatforms, built one migration at a time, plus B2B portals and integrations. A Celigo partner, it lists NetSuite, Sage, Microsoft Dynamics, Infor SyteLine, Epicor and SAP among the systems it connects, and says a large share of its work is rescuing implementations that stalled or under-delivered.

Named work: Lone Star Candle Supply moved from Magento to BigCommerce with custom Celigo middleware for ERP integration and enhanced shipping logic.

Best for: Manufacturers and distributors moving onto Adobe Commerce, or leaving Magento for BigCommerce, who want a Midwest team with ERP middleware experience. If Shopify Plus also needs to stay on the table, IWD is the cross-platform alternative.

04. Zaelab

Zaelab homepage, a B2B commerce consultancy for enterprise manufacturers and distributors
Zaelab · zaelab.com · B2B commerce consultancy · Composable and enterprise platforms

Quick stats: B2B-only positioning · BigCommerce Elite and BigDev Certified, not B2B Specialized, in the BigCommerce Partner Directory on October 29, 2026 · 2023 BigCommerce Excellence in Delivery award

Headquarters: US East Coast; its BigCommerce directory profile lists Westport, Connecticut.

Specialties: One of the few agencies that markets itself as B2B-only: commerce strategy for manufacturers and distributors, composable and enterprise platform builds, and connected-commerce work that ties storefronts to ERP, CPQ and dealer networks. Stronger on strategy and enterprise architecture than on quick mid-market builds.

Named work: Starwest Botanicals, a Sacramento supplier of organic botanicals, spices and teas, moved from separate B2B and B2C websites on legacy Magento to one BigCommerce storefront serving both, with Syspro ERP syncing product data, pricing, inventory and orders.

Best for: Enterprise manufacturers that need strategy and architecture before a build, and companies that want B2B and B2C on one storefront. Ask about the missing B2B Specialized badge on the first call.

05. Groove Commerce

Groove Commerce homepage, a B2B ecommerce development company working across BigCommerce, Shopify and other platforms
Groove Commerce · b2becommerceagency.com · Baltimore, Maryland · groovecommerce.com now redirects to The B2B eCommerce Agency

Quick stats: Now The B2B eCommerce Agency, "A Groove Commerce company" · BigCommerce Preferred, B2B Specialized and BigDev Certified in the BigCommerce Partner Directory on October 29, 2026 · Platform-agnostic B2B portal practice

Headquarters: Baltimore, Maryland.

Specialties: B2B portals for manufacturers and distributors of "roughly $50M to $500M in revenue" on whichever platform fits: BigCommerce, Shopware, Znode, Shopify, Adobe Commerce or Salesforce Commerce. It names NetSuite, Epicor, Prophet 21, SAP, Microsoft Dynamics, Infor and Acumatica among its ERPs, and runs a customer pilot before full rollout.

Published pricing: Its process starts with a two-week, $5,000 diagnostic.

Named work: Homepage testimonials come from TPC Wire & Cable and Ballard Industrial, whose store runs on BigCommerce, and its directory profile features Cutter & Buck's move from Magento 1 to BigCommerce Enterprise. The current site does not publish a B2B Edition case study.

Best for: Larger distributors that have not picked a platform, including teams weighing Salesforce Commerce, and that care most about buyer adoption. If BigCommerce is already decided, a BigCommerce-first partner may move faster.

06. Vaimo

Vaimo homepage, a global B2B and B2C commerce agency and Adobe Commerce Premier Partner
Vaimo · vaimo.com · Stockholm, Sweden · Global enterprise commerce

Quick stats: Founded 2008 · Adobe Commerce Premier Partner · 14 offices across Europe, the US, the Middle East and APAC · 500+ enterprise commerce projects

Headquarters: Stockholm, Sweden.

Specialties: Global enterprise B2B and B2C on Adobe Commerce and composable stacks, with a deep PIM practice (Akeneo, inRiver) that matters enormously for catalog-heavy B2B, plus Adobe Experience Cloud integration with Marketo, Target and Analytics. Minimum engagement size skews higher than US mid-market agencies.

Notable clients: Helly Hansen, Diesel, Speedo and Carlsberg.

Best for: Global brands running storefronts across 5+ countries, languages, currencies and tax regimes. US-only mid-market companies will find leaner fits elsewhere on this list.

07. Pivotree

Pivotree homepage, an enterprise commerce and data management provider
Pivotree · pivotree.com · Toronto · Enterprise commerce and MDM

Quick stats: Toronto-headquartered public company · Enterprise commerce, master data management and managed services under one roof · Platform practices across BigCommerce, Adobe Commerce and custom builds

Headquarters: Toronto, Canada, with offices in the US, India and Mexico.

Specialties: Enterprise B2B commerce implementation plus the unglamorous work that makes B2B function at scale: product data management, catalog normalization, supply chain consulting and managed operations. If your B2B problem is really a data problem, such as huge catalogs merged across acquisitions, its MDM practice is the differentiator no build-only company matches.

Best for: Enterprises whose bottleneck is product data quality and operational scale as much as the storefront. Overkill for mid-market builds.

08. BORN Group

BORN Group homepage, a brand-led enterprise commerce agency and Tata Consultancy Services company
BORN Group · borngroup.com · New York · Tata Consultancy Services company

Quick stats: Founded 2009 · Acquired by Tata Consultancy Services in 2020 · Adobe Commerce Premier Partner and BigCommerce Premier Elite in our May 2026 directory snapshots · Offices in New York, London, Bangalore, Berlin and Singapore

Headquarters: New York City (parent: Tata Consultancy Services, Mumbai).

Specialties: Brand-led enterprise builds that blend creative capabilities (brand strategy, design, content production) with Adobe Commerce and BigCommerce engineering, plus Adobe Experience Manager integration depth. Heavy fashion, luxury and CPG concentration, with visually distinctive, content-heavy storefronts rather than spreadsheet-driven B2B.

Notable clients: Tom Ford, Estée Lauder and Smashbox.

Best for: Premium luxury, fashion and CPG brands at enterprise scale that want creative and engineering from one vendor. Overkill for B2B distributors or mid-market DTC.

09. IronPlane

IronPlane homepage, a US ecommerce development company for Magento and BigCommerce builds, optimization and support
IronPlane · ironplane.com · Portland, Maine · Magento and BigCommerce

Quick stats: Adobe Bronze partner on October 29, 2026 · BigCommerce Elite Partner in our May 2026 BigCommerce guide · 60+ team · 24/7/365 support coverage

Headquarters: Portland, Maine, with a second location in Poznań, Poland.

Specialties: The store that already exists: audits, performance optimization, Hyva re-themes, upgrade rescues and support retainers on Magento, including stores it did not build. On BigCommerce it adds custom Stencil theme development, complex catalog migrations and B2B Edition implementations. More engineering depth than brand-led design.

Published pricing: HyperCare support from $1,500 a month for 10 hours. Extra work is quoted as time and materials, hosting is not included, and contracts run one, two or three years.

Best for: Mid-market merchants with a working Magento or BigCommerce store that needs to get faster, safer or cheaper to run. For ground-up enterprise B2B builds, the companies above have deeper benches.

10. Net Solutions

Net Solutions homepage, a hybrid US and India software company with an Adobe Commerce practice
Net Solutions · netsolutions.com · San Diego with India delivery

Quick stats: Founded 2000 · 200+ team across the US and India · Adobe Commerce Solution Partner · Hybrid onshore and offshore delivery

Headquarters: San Diego, California, with delivery centers in India.

Specialties: Commerce inside a broader software practice that also covers custom software, mobile apps and AI and ML integration. The hybrid model prices 30 to 50 percent below pure-US competitors. Strong on custom extension work, integrations with non-standard third-party systems, and modernization projects such as Magento 1 to Adobe Commerce.

Best for: Mid-market brands where budget is a real constraint and someone internal can own project management. Deep quote-workflow and punchout projects belong with the specialist tier.

11. Optimum7

Optimum7 homepage, a migration-focused ecommerce development company working across BigCommerce, Shopify and Magento
Optimum7 · optimum7.com · Miami, Florida · Migrations across platforms

Quick stats: Founded 2007 · Migration-specialist positioning across BigCommerce, Shopify and Magento · BigCommerce Elite Partner in our May 2026 BigCommerce guide · Development plus marketing services

Headquarters: Miami, Florida.

Specialties: High-volume platform migrations, including the messy legacy carts (Volusion, 3dcart-era stores, custom PHP) that other agencies decline, plus custom catalogs, integrations, checkout flows and app development for B2B use cases on SaaS platforms.

Best for: SMB and mid-market merchants escaping a legacy cart with B2B requirements in the destination. For ERP-integrated enterprise B2B, use the specialist tier.

12. 1Digital

1Digital Agency homepage, a BigCommerce-focused ecommerce development company with Shopify coverage
1Digital · 1digitalagency.com · Philadelphia · BigCommerce and Shopify

Quick stats: Founded 2010 · BigCommerce Elite Partner · BigCommerce-centered practice with Shopify coverage

Headquarters: Philadelphia, Pennsylvania.

Specialties: A steady line of BigCommerce B2B Edition builds for smaller distributors and wholesalers (customer groups, price lists, quote flows) with the pragmatic integrations that segment needs: shipping, tax and mid-tier ERPs. Design, development, SEO, PPC and content sit under one roof.

Best for: Wholesalers standing up B2B on BigCommerce without enterprise overhead who want one company for the build and the marketing. For complex ERP sync or very large catalogs, step up to the specialist tier.

Head-to-Head Comparison Matrix

Star ratings hide judgment calls, so this matrix shows only what our platform guides recorded. "Not shown" means our guides did not find it published, not that the company cannot do it.

CompanyPlatformsPartner status as recordedNamed ERP or B2B evidence
IWD AgencyAdobe Commerce, Magento, Shopify Plus, BigCommerceAdobe Solution Partner, Shopify Plus, BigCommerce EliteDMC: Adobe Commerce B2B with Infor SyteLine
AmericaneagleAdobe Commerce, BigCommerce, ShopifyBigCommerce Preferred, B2B Specialized (Oct 29)Berlin Packaging: proprietary ERP, quote cart
Classy LlamaAdobe Commerce, Magento, BigCommerceBigCommerce Preferred, B2B Specialized (Oct 29)Lone Star Candle Supply: Celigo ERP middleware
ZaelabBigCommerce, composableBigCommerce Elite (Oct 29)Starwest Botanicals: Syspro ERP
Groove CommerceBigCommerce, Shopify, Adobe Commerce, Salesforce Commerce, moreBigCommerce Preferred, B2B Specialized (Oct 29)B2B Edition case study not shown
VaimoAdobe Commerce, composableAdobe Commerce Premier PartnerPIM-heavy B2B (Akeneo, inRiver)
PivotreeBigCommerce, Adobe Commerce, customPublic companyMaster data management
BORN GroupAdobe Commerce, BigCommerceAdobe Premier, BigCommerce Premier Elite (May 2026)Brand-led; B2B not the focus
IronPlaneMagento, Adobe Commerce, BigCommerceAdobe Bronze (Oct 29)B2B Edition implementations
Net SolutionsAdobe Commerce, custom softwareAdobe Commerce Solution PartnerNon-standard third-party integrations
Optimum7BigCommerce, Shopify, MagentoBigCommerce Elite (May 2026)Custom integrations, B2B on SaaS
1DigitalBigCommerce, ShopifyBigCommerce Elite (May 2026)B2B Edition price lists, quote flows

What Drives the Cost of an Ecommerce Development Project

Serious ecommerce development companies quote after discovery, because pricing logic, account structures and integrations decide the budget far more than the storefront does. A quote that arrives before anyone has seen your ERP, your price lists and your order flow is a guess.

Five things move the scope most:

  • Catalog complexity. Customer-specific catalogs, contract pricing and configurable products multiply the testing scope.
  • Integration architecture. Real-time ERP reads cost more to build and test than a scheduled sync, and a productized connector costs less than a custom one when it fits your data.
  • B2B workflows. Company accounts, approval chains, quotes, punchout and net terms each add build and test time.
  • Data migration. Moving off Magento 1 or another platform means mapping products, customers, orders and URLs, and protecting your search rankings in the cutover.
  • Number of storefronts. Each brand, region or B2B portal adds content, configuration and testing.

Scope these five before you collect proposals, or the proposals will not be comparable. Ask every company for an itemized quote tied to that scope and a timeline you can hold them to.

Should You Hire a Single-Platform Specialist or a Multi-Platform Company?

This list favors companies that build on more than one platform, which is not the right answer for every buyer.

  • A single-platform specialist wins when the platform is decided and your hardest problem is specific to it: deep Magento engineering and upgrade debt, a Shopify B2B launch, or a BigCommerce B2B Edition build on a layered ERP price model. Our platform guides name these specialists, from Atwix on Magento to Uncap and BlueSwitch on Shopify B2B and Mira Commerce and Anchor Group on BigCommerce B2B.
  • A multi-platform company wins when the platform is still open, you are replatforming, the ERP integration is the hard part, or you already run more than one platform, such as a legacy Magento store next to a new Shopify Plus one.
  • Either way, check depth on the platform being recommended. Breadth can hide thin experience on one platform. Ask for named work on the exact platform proposed, and expect an honest answer about where the record is thinner. Ours is thinner on Shopify B2B, as our profile says.

Still weighing platforms? Our Shopify Plus vs BigCommerce vs Adobe Commerce vs Magento for B2B comparison covers the trade-offs, and our best Adobe Commerce agencies guide covers the licensed edition separately.

Decision Framework

Pick an ecommerce development company by your actual situation

Manufacturer or distributor whose ERP owns pricing and inventory, platform still open

IWD Agency. Certified practices on Adobe Commerce, Shopify Plus and BigCommerce, NetSuite connector software from sister company Dominate, and Adobe Commerce B2B work synced with Infor SyteLine at DMC.

Committed to Adobe Commerce, or leaving Magento for BigCommerce, with ERP middleware

Classy Llama. Manufacturer and distributor replatforms, a Celigo partnership and a B2B Specialized badge on BigCommerce.

One vendor for commerce, hosting and marketing under enterprise procurement

Americaneagle. Specialists beat it on B2B depth per dollar; nobody on this list beats it on vendor consolidation.

Strategy and architecture before any build (composable, CPQ, dealer networks)

Zaelab. B2B-only consultancy muscle. Bring it in before the platform decision, not after.

Larger distributor choosing among BigCommerce, Shopify, Adobe Commerce and Salesforce Commerce

Groove Commerce. A platform-agnostic B2B portal practice with a paid diagnostic and a customer pilot. IWD is the alternative if the shortlist is Adobe Commerce, Shopify Plus and BigCommerce.

Global B2B across regions, languages and tax regimes

Vaimo. Fourteen offices and 500+ enterprise projects. Overkill for a US-only mid-market build.

Product data is the real problem, or the storefront has to feel editorial

Pivotree or BORN Group. Pivotree when master data management is the bottleneck; BORN Group for luxury, fashion and CPG brands that want creative and engineering from one vendor.

Existing Magento or BigCommerce store that needs speed and stability, not a rebuild

IronPlane. Optimization-first engagements and a published support entry price. Start with an audit, not a proposal.

Budget binds, or you are escaping a legacy cart

Net Solutions, Optimum7 or 1Digital. Net Solutions for hybrid-delivery builds, Optimum7 for messy migrations, and 1Digital when marketing belongs in the same engagement.

Platform already decided, and you want the team with the most launches on it

A platform specialist. Our Shopify B2B, BigCommerce B2B and Magento support guides name the deepest single-platform records.

Questions to Ask Every Ecommerce Development Company

  1. Which platforms do you build on, and which would you not recommend for us? A company that cannot argue against one of its own platforms is not giving platform advice.
  2. Show me three live client stores from the last 24 months on the platform you are recommending. Then verify them yourself through response headers or page source.
  3. Which ERPs have you integrated, in named projects, and what broke? Real veterans have war stories; pretenders have feature lists.
  4. What is your partner tier on each platform today? Then check the Adobe, Shopify and BigCommerce directories yourself.
  5. For each requirement on our list, is it native, an app or custom? Listen for specific answers on catalogs, quotes, terms, tax exemption and freight.
  6. How would you architect contract pricing: live ERP reads or scheduled sync? There is no universal answer, but there should be a reasoned one.
  7. Who exactly works on our account, and where do they sit? Names, roles, hours and the onshore and offshore split.
  8. What happens after launch? Patching and upgrade cadence, response commitments with numbers attached, and who owns the integration when it fails.

How We Scored This List: Methodology

Five checks, applied to every company including IWD:

  1. Platform breadth. Practices on more than one commerce platform, or commerce combined with custom software, composable architecture or data management.
  2. B2B and ERP evidence. Named ERPs and named B2B projects scored above capability lists.
  3. Partner verification. Tiers stated as our guides recorded them, with the date: May 2026 directory snapshots for the BigCommerce and Adobe Commerce guides, and October 29, 2026 checks for the BigCommerce B2B, Shopify B2B and Magento support guides.
  4. Delivery model. Headquarters, office locations and the onshore, hybrid or offshore mix.
  5. Company size fit. Inferred from client rosters, published positioning and published pricing where it exists.

Reviewed and left out: integration platforms such as Celigo, Boomi and Jitterbit, and connector vendors such as i95Dev, DCKAP and APPSeCONNECT, because this list covers development companies rather than integration software. Our NetSuite integration partners guide compares them. Platform specialists such as Atwix, Wagento, Inviqa, Uncap, BlueSwitch, Mira Commerce and Anchor Group are profiled in our platform guides.

Disclosure: IWD Agency publishes this guide and lists itself first. Where a competitor fits your situation better, the decision framework says so by name. If you think a placement is wrong, send us the evidence and we will re-check it.

Frequently asked questions

What are the top ecommerce development companies in 2026?

It depends on your situation, which is why this list is organized by fit. For ERP-heavy B2B with the platform still open, IWD Agency, Classy Llama and Groove Commerce. For full-service enterprise delivery, Americaneagle. For B2B strategy, Zaelab. For global work, Vaimo. For data-heavy enterprises, Pivotree. For brand-led luxury, BORN Group. For existing stores, IronPlane. For tighter budgets, Net Solutions, Optimum7 and 1Digital.

What does an ecommerce development company do?

It designs, builds, migrates, integrates and supports online stores. For B2B and enterprise merchants the storefront is usually the smaller half of the work: connecting it to the ERP, modeling customer-specific pricing and catalogs, migrating customer and order history, and keeping patches, upgrades and integrations healthy after launch.

How much do ecommerce development companies charge?

Serious companies quote after discovery, because catalog complexity, B2B workflows and ERP integration decide the budget. Expect an itemized quote tied to a written scope and a timeline. If a company quotes a complex B2B build before seeing your ERP and price lists, treat the number as a guess.

Should I hire a multi-platform or a single-platform development company?

Choose a multi-platform company when the platform is still open, you are replatforming, or the ERP integration is the hard part, because it can recommend against one of its own platforms. Choose a single-platform specialist when the platform is decided and you want the team that has shipped your exact use case most often. Either way, ask for named work on the platform being recommended.

How long does an ecommerce development project take?

By the brackets in our platform guides, a new Shopify Plus B2B storefront typically takes 12 to 22 weeks, a mid-market BigCommerce B2B Edition build 12 to 20 weeks, a fresh Magento or Adobe Commerce build 16 to 28 weeks, and an Adobe Commerce B2B build 22 to 36 weeks. ERP integration runs partly in parallel: 4 to 10 weeks with a productized connector, 8 to 20 weeks for custom sync.

How do I verify an ecommerce development company's claims?

Ask for three live client stores from the last 24 months and check them: Magento and Adobe Commerce stores expose headers such as X-Magento-Tags, and BigCommerce B2B Edition stores usually load a buyer-portal script visible in the page source. Check the Adobe, Shopify and BigCommerce partner directories for current tiers, and ask for named ERPs in named projects. Anonymous case studies plus generic integration claims are a warning sign.

Which ecommerce platform is best for B2B?

It depends on catalog complexity and your ERP. Adobe Commerce leads for complex catalogs, deep customization and native B2B features such as company hierarchies, negotiable quotes and requisition lists. Shopify Plus B2B fits moderate B2B needs and wins on operating cost. BigCommerce B2B Edition sits between them, with strong native B2B features at SaaS economics. A company certified on only one of these will recommend that one every time.

Best B2B ecommerce agencies · Best Magento development agencies · Best Adobe Commerce agencies · Best Shopify Plus agencies · Best BigCommerce agencies · Best Shopify B2B agencies · Best BigCommerce B2B agencies · Best Magento support companies · Best NetSuite integration partners

If you are scoping a new build, a replatform or an ERP integration, book a 30-minute assessment. We will tell you honestly whether IWD is the right fit, and if another company on this list matches your situation better, we will say which one.

Work with IWD

IWD has built ecommerce for 300+ brands since 2008, on Adobe Commerce, Magento, Shopify Plus and BigCommerce. If you want a team that will also tell you when your preferred platform is the wrong one, book a 30-minute assessment.