F or decades, wholesalers and manufacturers took business-to-business (B2B) purchase orders by fax.
Some ran for pages, hundreds of line items long, and someone keyed them into an ERP system the next morning. That was normal.
It isn’t anymore. Global B2B eCommerce reached an estimated $32.11 trillion in 2025, more than five times the size of the entire global direct-to-consumer (DTC) market (International Trade Administration, 2025). DTC gets most of the marketing attention. B2B is where the money actually moves.
How Big Is B2B eCommerce Compared to DTC?
Global B2B eCommerce is roughly five times the size of global retail (B2C) eCommerce. The International Trade Administration puts the global B2B eCommerce market at $32.11 trillion in 2025, growing at a 14.5% compound annual growth rate (CAGR) and trending toward $36 trillion in 2026. Global retail eCommerce, by comparison, reached $6.42 trillion in 2025, up 6.8% year over year, per eMarketer’s 2025 Worldwide Retail eCommerce Forecast, the slowest growth rate since 2022.
One caveat worth flagging: research firms don’t all measure this the same way. Grand View Research uses a narrower definition and puts global B2B eCommerce at $24.08 trillion in 2025. The exact multiple depends on the source, but every major estimate puts B2B eCommerce at four to five times the size of B2C. That’s not a rounding error. It’s a different scale of economy.
How Does the US Market Compare?
The gap holds up at home too. US B2B eCommerce reached an estimated $10.1 trillion in 2025 and is projected to hit $11.4 trillion by 2030. US retail (B2C) eCommerce, meanwhile, totaled about $1.23 trillion in 2025, up 5.4% year over year, according to Digital Commerce 360’s analysis of US Census Bureau data.
That puts US B2B eCommerce at roughly eight times the size of US B2C eCommerce. Separate research from Grand View Research estimates B2B now accounts for close to 87% of total US eCommerce transaction value. Most headlines still cover the smaller slice.
What’s Driving the Shift to Digital B2B Buying?
The bigger driver isn’t the software. It’s the buyer.
Procurement managers, plant managers, and purchasing directors today grew up ordering everything online. They expect the same speed at work that they get shopping for themselves. More than 90% of B2B transactions in the US are now conducted electronically, according to Digital Commerce 360 (January 2026).
The research backs this up. Forrester found that 74% of business buyers complete more than half their research online before making an offline purchase. And 67% of B2B buyers say they’re willing to spend $50,000 or more online without ever talking to a sales rep, per McKinsey’s B2B Pulse research. Gartner’s widely cited 2020 forecast, that 80% of B2B sales interactions would move to digital channels by 2025, has largely held up: McKinsey’s 2024 B2B Pulse survey confirmed the shift happened close to schedule.
Seventy-five percent of B2B executives now say the move to digital is permanent, not a pandemic-era blip, according to McKinsey.
Why Is DTC eCommerce Getting Harder to Scale?
DTC still builds strong brands. Nike, Warby Parker, and Glossier all proved the model works. But the economics have gotten tougher.
Customer acquisition costs keep climbing. Paid media is crowded. Buyers now expect free shipping, free returns, and two-day delivery as standard, not a perk. Margins get squeezed from every direction.
B2B often starts from a stronger position: contract pricing, repeat orders, and longer customer relationships. A distributor might keep the same account for twenty years. Order size tells the same story. Global average order value in B2C eCommerce sits around $150. Typical B2B orders often start around $500 to $1,000 for routine purchases, and contract or wholesale orders can run into the tens of thousands, according to eCommerce benchmark data from WiserReview (2025).
How Are B2B Commerce Platforms Catching Up?
Platforms have closed the gap fast. Shopify, Adobe Commerce, BigCommerce, and Salesforce have all invested heavily in native B2B features: company accounts with multiple buyers, contract pricing, tiered catalogs, net payment terms, quick reorder tools, and direct ERP integrations.
None of that is exotic technology anymore. It’s table stakes. And the payoff is measurable: companies with high digital-commerce maturity beat their sales targets by a 110% wider margin than low-maturity peers, according to Deloitte Digital’s February 2026 research. The advantage lives in the gap between having a B2B portal and actually running the business through it.
Where Will B2B eCommerce Growth Come From Next?
B2B eCommerce is growing roughly twice as fast as DTC. Global B2B eCommerce is expanding at a 14.5% CAGR (International Trade Administration), compared to 6.8% growth for global retail eCommerce in 2025 (eMarketer).
Three groups are capturing most of that growth:
- Manufacturers standing up direct wholesale ordering
- Distributors replacing phone and fax orders with digital portals
- Hybrid brands selling to consumers, retailers, and distributors at once
That third group is worth watching. Running B2B and DTC side by side gives a brand more than one revenue engine, and less exposure if either channel slows.
The Bottom Line
B2B eCommerce isn’t primarily a marketing project. It’s an operations project. Inventory sync, ERP integrations, customer-specific pricing, credit terms, and shipping rules are the real complexity. Get those wrong, and the storefront becomes an expensive brochure nobody uses.
DTC still builds brand awareness. B2B is where the revenue scale lives, and it’s still underbuilt relative to its size. Companies investing in the operational side of B2B eCommerce now, not just the storefront, are the ones positioned to capture the advantage while the door is still open.
