Leadbay, a startup with roots in both France and the US, has successfully closed a $4.3 million seed funding round, spearheaded by prominent accelerator Y Combinator. The investment also saw participation from Rebel Ventures, Roosh Ventures, Inovexus Ventures, TS Ventures, Alumni Ventures, Bright Ventures by Bright Data, Transpose Platform, Deel Ventures, and various angel investors. This capital injection is set to fuel Leadbay's mission to expand its US go-to-market team in San Francisco, enhance its AI inference model through a research partnership with Sorbonne University, and grow its engineering team.

The company, co-founded in 2023 by CEO Ludovic Granger and CTO Milan Stankovic, PhD, addresses a critical gap in the B2B sales landscape. While existing sales intelligence platforms like Sales Nav, Clay, or ZoomInfo primarily focus on companies with strong digital signals (e.g., hiring activity, fundraising, online presence), Leadbay specializes in identifying and qualifying what it terms "digitally scarce" businesses. These include local plumbers, hairdressers, hotels, and manufacturers—SMBs that constitute a significant portion of the economy but are often invisible to traditional prospecting tools due to their minimal online footprint.

Leadbay's proprietary AI inference model is designed to analyze fragmented, unstructured, and low-signal data, effectively mimicking the intuition of top sales representatives to discover and qualify leads that others miss. This innovative approach has already yielded impressive results for its enterprise clients, including global brands like L'Oréal, Saint-Gobain, Deel, Gerflor USA, Corgi, and Nespresso B2B. These customers have reportedly seen their addressable market triple and their supply of qualified leads increase tenfold.

The startup's potential was recognized early by Y Combinator CEO Garry Tan, who, in August 2025, highlighted the immense opportunity in serving SMBs, which represent 40% of the U.S. GDP. He described it as a "blue ocean and a billion-dollar market." With this new funding, Leadbay is poised for significant distribution in both France and the U.S., aiming to transform the daily life of sales representatives by providing access to previously unreachable market segments.