Here are the top B2B marketplaces and B2B-capable platforms to consider in Latin America (brief description and why they matter):

1. Mercado Libre — Mercado Libre Empresas / new B2B unit

   • Largest regional marketplace; in 2025 it launched an explicit B2B/corporate unit and already supports millions of wholesale-enabled users across major LATAM markets (Brazil, Mexico, Argentina, Chile). Best for reach, logistics and integrated fintech (Mercado Pago). (reuters.com)

2. Alibaba / Alibaba.com

   • Global B2B sourcing platform widely used by LATAM importers and wholesalers. Good for cross‑border sourcing and large-volume procurement; has strong traction in Brazil and Mexico. (statista.com)

3. Amazon (Amazon Mexico / regional marketplace + Amazon Business features)

   • Amazon’s regional footprint (especially Mexico and Brazil) gives access to fulfillment and corporate procurement workflows. Amazon Business features may be available or supported via seller programs in LATAM—useful for established buyers/sellers needing scale and logistics. (reuters.com)

4. Linio / Falabella marketplaces (regional)

   • Linio (and Falabella’s ecosystem) is strong in Mexico, Colombia, Peru and Chile; useful for reaching regional retailers and distributors. Often used by wholesalers and brands expanding into retail channels. (practicalecommerce.com)

5. Americanas / B2W / Magazine Luiza (Brazil)

   • Major Brazilian marketplaces (Americanas, Magazine Luiza, B2W network) are critical for B2B/B2C distribution in Brazil — useful if your focus is the Brazilian market. (vinculumgroup.com)

6. Vertical / regional B2B platforms and SaaS marketplaces

   • CommerceUp / SourcingUp and other LATAM B2B SaaS marketplaces/platforms help wholesalers, distributors and manufacturers set up B2B storefronts and private marketplaces (good for digitalizing existing wholesale channels). Best when you want a branded B2B portal rather than relying on a large public marketplace. (es.wikipedia.org)

7. Superapps and on‑demand platforms with B2B offerings (Rappi, others)

   • Rappi and similar superapps increasingly offer business accounts, delivery/fulfillment and fintech services for small retailers and restaurants — useful for fast local distribution and micro‑B2B sales. (about.rappi.com)

How to choose the right marketplace (short checklist)

• Target country: pick local leaders (Mercado Libre for most LATAM, Americanas/Magazine Luiza for Brazil, Linio/Falabella for Andean/Spanish‑speaking markets).
• Volume vs. discovery: Alibaba for international bulk sourcing; Mercado Libre/Amazon for regional reach and logistics.
• Logistics & payments: prefer platforms with integrated fulfillment and local payments (reduces friction).
• B2B features: bulk pricing, credit/financing, business accounts, invoices — confirm these are available in the specific country and category.
• Vertical fit: some niches (industrial supplies, agri inputs, pharma) have specialized platforms or distributors — search for vertical marketplaces or local B2B portals.

If you want, I can:

• shortlist 3–4 marketplaces by country (Mexico, Brazil, Colombia, Chile, Argentina), or
• prepare an entry checklist (fees, KYC, logistics, contracts) for onboarding sellers/buyers on any of these platforms.