A venture capital firm that wants to invest in B2B marketplaces and other B2B ecommerce platforms even before these ventures become startups has raised $45 million.

Interplay will use the money raised to invest in 20 more very early stage B2B ecommerce marketplace and platform companies. It will provide with small cash infusions of $1 million to $2 million per start-up, Interplay says. Interplay is a New York-based investment firm.

“The closing of $45 million for our third fund, Interplay Early-Stage Fund III, will focus on B2B marketplaces and vertical software companies,” says CEO Mark Peter Davis.

The latest round of investment in Interplay brings its total funding to more than $140 million. The company did not say its primary funding source.

Thus far, Interplay has made 52 investments in B2B marketplaces. They include LeafLink, a wholesale cannabis platform, and Provi.com, an online marketplace that simplifies the complex process of ordering wholesale alcohol by connecting buyers, distributors, and suppliers among others.

Interplay’s most recent investment is in Roofr.com, which leverages satellite imagery and takes accurate measurements of the roof to generate a tentative estimate, enabling users to get access to the desired roofers with transparent pricing, according to Pitchbook.com.

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