B2B Marketplaces

A capture concept in the marketplace cluster of Kyle’s June 18, 2026 saved-bookmark batch, alongside the parent Marketplaces page and SaaS + Marketplace. All three share the same seed link — Casey Winters’ essay on the SaaS + marketplace model — and cross-tag one another. The thread is the question of how marketplace dynamics apply business-to-business: matching buyers and sellers among companies rather than consumers, and how a software layer can sit on top of (or seed) the transaction. The concept is captured rather than synthesized; the wiki carries the link and the cross-links but no developed argument yet.

Context: B2B marketplaces are platforms that connect business buyers and sellers (wholesale goods, freight, materials, services). A recurring growth pattern is starting with SaaS tooling to acquire one side, then layering transactions on top — the “SaaS-enabled marketplace” model.

Quick Capture links — June 18, 2026

Links Kyle saved to this topic on June 18, 2026 (manual capture batch).

• https://caseyaccidental.com/saas-marketplace/ — Casey Winters: the SaaS + marketplace model. Marketplaces SaaS + Marketplace

Where this appears

• Marketplaces — parent concept; shares the Casey Winters seed link.
• SaaS + Marketplace — the model where software seeds or sits atop the marketplace transaction.

The landscape, and the numbers — November 2022

Two articles read the same day, plus the framing Kyle used in a press interview (November 2nd, 2022 — Stephanie Palazzolo (Business Insider)).

The market: roughly $100 trillion flows between businesses — 4-5x consumer transaction volume. Only 5-10% of B2B transactions happen online; about half still ran through calls, fax and in-person reps in 2022. Projected $3.6 trillion in B2B marketplace sales by 2024.

Reading: The $100 Trillion Opportunity in Marketplaces on the size of the prize · B2B Marketplaces Will Be the Next Billion-Dollar E-Commerce Startups on how they monetize.

The structural point both make: these go vertical. A B2B marketplace is tailored to one deceptively large industry — global chemicals alone is $3.8T in revenue. And a marketplace that stays a storefront doesn’t hold; the business is in what wraps the transaction. Factor.io embedding working-capital lending into the purchase-order flow is the pattern, not the exception — the same Capital-as-a-Service wedge Control Points 2.0 describes from the software side.

The named landscape

company	market
Knowde	Chemicals — ingredients and raw materials for a $5T market
Moov	Used semiconductor equipment, $105B market
Faire	Wholesale for independent retailers and brands; crossed $1B annual volume
Material Bank	Construction and interior-design materials
LeafLink	Wholesale for the cannabis industry
Mirakl	White-label marketplace software for wholesalers and retailers
Construct Connect	Bidding platform for construction projects

Contrary’s own positions in the category (as of November 2022): Faliam, Tava Health, Patch.