# Leadbay

> Leadbay is a Y Combinator (F25) B2B sales startup building a domain-specific AI model that discovers and qualifies small-to-mid-sized business leads that traditional platforms like LinkedIn, ZoomInfo, Apollo, and Clay can't find. Trained on market data, a company's own CRM/ERP history, and reps' instincts, Leadbay learns a team's Ideal Customer Profile and predicts who will buy next - delivering qualified leads directly inside agentic workflows and AI apps like Claude, ChatGPT, and Copilot. Customers in data-scarce industries such as construction, hospitality, manufacturing, and B2B services report roughly 3-5x more qualified prospects. The company raised a $4.3M seed round led by Y Combinator in May 2026 and is based in San Francisco.

- **Founded:** 2023
- **Headquarters:** San Francisco, California, United States
- **Founders:** Ludovic Granger (Co-founder & CEO), Milan Stankovic (Co-founder & CTO)
- **Team size:** ~8-29 (YC lists ~8; enrichment data lists ~29)
- **Products:** Leadbay AI Model for B2B Sales, Predictive Lead Scoring & ICP Learning, Leadbay Compass / Lead Discovery, MCP Library & Agentic Delivery, Waterfall Enrichment & Signal Crawling
- **Notable:** Accepted into Y Combinator's Fall 2025 (F25) batch., Raised $4.3M seed round led by Y Combinator (May 2026)., Customers report 3-5x more qualified leads and over half of closed deals from previously undiscovered companies.

## Products & services

- **Leadbay AI Model for B2B Sales** — A domain-specific AI model trained on exhaustive market data, a company's internal knowledge (CRM, ERP, CSV), and reps' instincts to predict who a company's next customers will be, especially in data-scarce markets.
- **Predictive Lead Scoring & ICP Learning** — Learns a team's Ideal Customer Profile from past won/lost deals, then ranks and scores new prospects by their likelihood to buy.
- **Leadbay Compass / Lead Discovery** — Discovers and qualifies SMB leads in construction, hospitality, manufacturing, retail, and B2B services that don't appear in LinkedIn, ZoomInfo, Apollo, or Clay.
- **MCP Library & Agentic Delivery** — Native UX/UI components and connectors that deliver qualified leads and sales tools directly inside AI apps like Claude, ChatGPT, and Copilot.
- **Waterfall Enrichment & Signal Crawling** — Access to 20+ databases plus human-like signal crawling to answer qualification questions and enrich prospect records; syncs with CRM, ERP, data lakes, and activation tools.

## Achievements

- Accepted into Y Combinator's Fall 2025 (F25) batch.
- Raised $4.3M seed round led by Y Combinator (May 2026).
- Customers report 3-5x more qualified leads and over half of closed deals from previously undiscovered companies.
- Adopted by enterprise brands including L'Oreal, Saint-Gobain, Nespresso B2B, and Deel.
- Established a research partnership with Sorbonne University on low-data AI inference.

## Latest updates

- **2026-05** — Closed $4.3M seed round led by Y Combinator; plans to expand the U.S. GTM team in San Francisco, grow engineering, and fund a Sorbonne research partnership.
- **2026-06** — Launched 'predictive prospecting' positioning and Keynote series unveiling its AI Model for B2B Sales.
- **2026** — Rolled out MCP library to deliver qualified leads inside AI apps like Claude, ChatGPT, and Copilot.

## Links

- Website: https://leadbay.ai
- LinkedIn: https://www.linkedin.com/company/leadbay
- Twitter/X: https://x.com/LeadbayAI

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Profile page: https://yespress.io/leadbay-yc-f25
Published by YesPress — https://yespress.io
Last updated: 2026-07-30