B2B Ecommerce Statistics for 2026

Market size, buyer behavior, and ROI data for manufacturers, distributors, and industrial sellers

Last updated: July 28, 2026  ·  Reviewed and refreshed quarterly

B2B was once relegated to person-to-person interactions and sales calls. But, as you’ll see in these stats, ecommerce for B2B is continuing to grow, as is the usage of AI. You’ll find stats about B2B ecommerce market size, AI, buyer behavior, and marketplaces. 

Market Size & Growth

The US B2B ecommerce market reached $2.297 trillion in site sales in 2024, up 10.5% year over year, and is projected to hit $3.027 trillion by 2028. The broader global B2B ecommerce market is separately estimated at $36 trillion in 2026, growing at a 14.5% compound annual growth rate.

• US B2B ecommerce site sales reached $2.297 trillion in 2024, up 10.5% year over year, and are projected to reach $3.027 trillion by 2028.  (Elogic Commerce, 2026)
• Total US manufacturing and wholesale sales grew just 0.4% in 2025, even as digital B2B channels gained share at double-digit rates (Elogic Commerce, 2026)
• The global B2B ecommerce market is projected to reach $36 trillion in 2026, growing at a 14.5% compound annual growth rate.  (International Trade Administration, 2026)
• About 12% of US B2B sales were transacted digitally in 2024, a share projected to reach 14.3% by 2028.  (BigCommerce, citing Forrester, 2026)
• Four industries account for roughly 60% of US B2B ecommerce sales: drugs and druggists' sundries (this includes biological and medical products, botanical drugs and herbs, and pharmaceutical products), grocery and related products, electrical and electronic goods, and motor vehicles and parts. (Forrester, 2022)
• The US B2B ecommerce market is projected to grow at an 18.5% compound annual growth rate from 2026 to 2033.  (Uncap, 2026)

Buyer Behavior & Self-Service

B2B buyers increasingly skip the sales rep altogether: 61% now prefer a rep-free buying experience, 83% have already defined their purchase requirements before ever talking to a rep, and 39% place orders over $500,000 through self-service channels alone. Ecommerce and digital channels are doing away with the traditional B2B gatekeepers.

• 61% of B2B buyers now prefer a rep-free buying experience, signaling a strong shift toward self-service research and evaluation.  (Consensus, 2026)
• 67% of B2B buyers prefer self-service portals over interacting with a sales rep for routine reorders and product information.  (Forrester, 2024, via Creatuity)
• 83% of B2B buyers have already defined their purchase requirements before engaging a sales rep, and by first contact have typically completed 61% of their buying journey.  (The SEO Works, 2026)
• 39% of B2B buyers now place orders over $500,000 through self-service ecommerce or remote channels, up from 28% two years earlier.  (McKinsey Global B2B Pulse, via Wave Connect, 2026)
• 67% of B2B buyers expect payment term options that match their internal accounting cycles. This is a recurring blocker to full digital adoption that consumer ecommerce simply doesn't face.  (Uncap, 2026)
• Real-time inventory visibility is cited as one of the highest-priority capabilities industrial B2B buyers look for before shifting procurement to a digital channel.  (Uncap, 2026)
• 45% of B2B buyers used AI during a recent purchase, weighing an average of seven information sources before deciding.  (Gartner, 2026)
• The average B2B buying cycle length dropped from 11.3 months in 2024 to 10.1 months in 2025. (6Sense)

Conversion & ROI Benchmarks

Industrial B2B conversion rates vary sharply by traffic type: 2–3% is considered strong for anonymous visitors, while best-in-class quote-to-order flows reach 45–55%. B2B ecommerce investment in this space shows 211–391% returns over a three-year period.

B2B ecommerce conversion is not like B2C conversion. The sales cycles are longer, order sizes are bigger and custom needs may require talking to a salesperson. If you sell B2B and B2C it’s a good idea to look at your conversion rates for these segments separately. 

• In industrial B2B, 2–3% visitor-to-purchase conversion is considered strong for open, anonymous traffic. Logged-in reorder buyers convert at 15–30%, quote-to-order flows run 25–35%, and 45–55% represents best-in-class performance.  (Elogic Commerce, 2026)
• B2B ecommerce investment shows 211–391% returns over a three-year period.  (Elogic Commerce, 2026)
• Order-processing costs drop from roughly $50–150 per order under manual handling to about $25 per order once self-service ecommerce is in place.  (Elogic Commerce, 2026)
• 86% of B2B purchases stall somewhere in the buying process, and 81% of buyers report dissatisfaction with the provider they ultimately chose.  (Forrester, State of Business Buying, 2024)

AI & Automation

AI is moving from a research aid into an active participant in the B2B transaction itself. Gartner projects AI agents will manage 90% of B2B procurement by 2028, channeling more than $15 trillion in spend — while 45% of buyers already report using AI during a purchase today.

AI is everywhere, so it’s not a surprise it’s gaining traction in the B2B space. Don’t be shocked if next time you try to do a bulk order online, you’re interacting with an AI salesperson or AI generated content.

• Gartner projects that 75% of B2B commerce transactions will be influenced or automated by AI by 2028.  (Gartner, 2025)
• AI agents, functioning as autonomous procurement assistants, are projected to manage 90% of B2B procurement by 2028. Over $15 trillion of B2B spend is estimated to go through AI agent exchanges by 2028  (Gartner, 2025)
• The global headless commerce market is estimated at $2.13 billion in 2026 and projected to reach $7.24 billion by 2033, growing at a 22.6% compound annual growth rate (Coherent Marketing Insights)
• 19% of B2B sales teams have already begun using generative AI and finding success. 23% are experimenting with gen AI. Teams that blend personalized customer experiences with generative AI are 1.7 times more likely to increase market share. (McKinsey)
• Out of 4,000 B2B buyers, nearly 90% of buyers report AI features are now part of the solutions they acquired. (6Sense)

Marketplaces & Consolidation

Marketplaces are growing fast in dollar terms — Amazon Business alone generated $83.1 billion in gross merchandise value in 2025 — but still represent a small share of total B2B ecommerce, which remains dominated by direct manufacturer- and distributor-run sites.

B2B ecommerce isn’t only about your website, it also means marketplaces like Amazon. 

• Amazon Business generated $83.1 billion in gross merchandise value in 2025, about 6.2% of total Amazon merchandise sales.  (Capital One Shopping Research, 2026)
• US B2B marketplace ecommerce sales totaled $349.9 billion in 2024, up 34.6% from 2023.  (Capital One Shopping Research, 2026)
• Marketplace-model, or “non-merchant,” ecommerce still accounts for only about 1% of total US B2B ecommerce. Direct manufacturer- and distributor-run ecommerce dominates the category by volume. This figure is from 2022.  (Forrester, 2022)
• MSC Industrial's Q3 sales exceeded $1 billion, Kawasaki Engines USA grew average order value by 500%, and Global Industrial posted 9.2% Q1 growth from digital channels.  (MarketScale, 2026)
• Consolidation is accelerating alongside digital growth: Motorcar Parts of America acquired the Centric Parts brake brands, and QXO's planned acquisition of TopBuild won shareholder approval in mid-2026.  (Digital Commerce 360, via MarketScale, 2026)

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Frequently Asked Questions

How big is the US B2B ecommerce market in 2026?

In the US B2B ecommerce sales hit $2.297 trillion in 2024. That was an increase of 10.5% year over year. By 2028 the US B2B ecommerce sales are projected to hit $3.027 trillion (Elogic Commerce, 2026). Globally, the B2B ecommerce market is estimated to hit $36 trillion in 2026 (International Trade Administration, 2026).

Are B2B buyers moving away from sales reps?

Yes, the majority of B2B buyers (61%) now prefer a rep-free buying experience. 83% already define their purchase needs before engaging with a rep (Consensus, 2026; The SEO Works, 2026). 39% of B2B buyers now place orders over $500,000 through self-service ecommerce. That’s up from 28% just two years prior (McKinsey Global B2B Pulse, via Wave Connect, 2026). 

What's a good conversion rate for B2B ecommerce?

Conversion rate benchmarks are tricky. For industrial B2B, an average of 1-3% is a good conversion rate for anonymous traffic. Logged-in buyers who reorder often convert at 15-30%. Those requesting quotes and completing an order convert around 25-35%. The highest conversion rates of 45-55% are for best-in-class B2B ecommerce (Elogic Commerce, 2026). Segment your ecommerce site’s B2B and B2C conversion rates when possible.

Is AI actually being used in B2B purchasing yet, or is it still a forecast?

Yes and Yes. Gartner found that 45% of B2B buyers are already using AI during a recent purchase. McKinsey finds that 19% of B2B sales teams have implemented generative AI with successful results. Gartner further forecasts that by 2028, 90% of B2B procurement will be managed by AI agents. 

Do marketplaces like Amazon Business dominate B2B ecommerce?

No. In 2025, Amazon Business had $83.1 billion in GMV (Capital One Shopping Research, 2026). While this is a large value, it only accounts for about 1% of total US B2B ecommerce (Forrester, 2022). The dominant B2B ecommerce channels are direct manufacturer and distributor-run. 

A Note on Sourcing

Every figure above is attributed to a named source and dated. The four-industry breakdown and the marketplace-share figure both trace back to the same 2022 Forrester report and haven't been refreshed since, so they're flagged rather than presented as current. Market-size figures early on span very different scopes so the same-sounding number in two different places isn't necessarily a contradiction. This page is reviewed and refreshed quarterly as new research becomes available.

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