Here are leading B2B platforms used by buyers and sellers in North America, with a short note on what each is best for:

1. Amazon Business — broad B2B marketplace and procurement features (multi-user accounts, tax-exempt purchasing, integration with logistics). (anywhereb2b.com)

2. Thomasnet — North America–focused industrial/manufacturing supplier directory and RFQ tools (ideal for OEMs, MRO, engineering sourcing). (blog.webnexs.com)

3. Alibaba.com — global B2B marketplace with large supplier base used by many North American buyers for volume and cross‑border sourcing. (medium.com)

4. Faire — wholesale marketplace connecting independent retailers with brands and wholesalers (popular for consumer goods/retail replenishment). (anywhereb2b.com)

5. Handshake (Shopify’s B2B/wholesale) — wholesale ordering platform for brands and merchants (integrates with Shopify stores/fulfillment). (blog.webnexs.com)

6. SAP Ariba — enterprise procurement and supplier‑management platform used by large organizations for sourcing, contracts, and P2P workflows. (globalgrowthinsights.com)

7. Coupa — cloud procurement/spend-management platform for enterprise buyers (procure-to-pay, analytics, supplier risk). (globalgrowthinsights.com)

8. Grainger (e‑commerce & supplier/distributor) — major industrial distributor with strong B2B e‑commerce for maintenance, repair and operations (MRO). (anywhereb2b.com)

9. MFG.com (and IndustryNet, Kompass, Manta) — specialist supplier marketplaces and directories for custom manufacturing, industrial parts and business listings. (seymourtrade.com)

Notes and quick guidance

• Choose by function: marketplaces (Amazon Business, Alibaba, Faire) are best for volume buying and discovery; directories/industry portals (Thomasnet, IndustryNet, MFG.com) are best for certified local manufacturers and technical sourcing; procurement SaaS (SAP Ariba, Coupa) are best for enterprise procurement workflows and compliance. (blog.webnexs.com)
• Vertical focus matters: Thomasnet, Grainger, and MFG.com excel for industrial/MRO; Faire and Handshake are stronger for retail/consumer wholesale; Alibaba is strongest for global low‑cost sourcing. (blog.webnexs.com)
• If you want, I can: (a) rank these by traffic or market share, (b) suggest which to use for a given industry (e.g., electronics, apparel, industrial parts), or (c) pull recent market‑share/usage figures and vendor links.