François Lejeune
Product Manager at FullEnrich
François is FullEnrich's first Product Manager, previously at Lemlist. He built a waterfall enrichment engine from zero to $1M in revenue and is the most credible voice on how enrichment actually works under the hood — from provider routing to match-rate optimization.
waterfall enrichmentdata enrichmentB2B contact dataenrichment APIdata quality
Articles by François Lejeune
September 24, 2026
The 9 Best MCP Servers for Sales Teams in 2026
Nine MCP servers for sales ranked by job: contact data, CRM, prospecting, call notes and research, with what each can write and the plan it needs.
September 22, 2026
How to Build an AI Sales Agent That Actually Closes Deals in 2026
How to build an ai sales agent step by step: components, tools and the data layer that decides whether it books meetings or burns your domain.
July 1, 2026
What Is Data Enrichment? The Field Guide From Someone Who Built One
Data enrichment fills missing emails, phones, and company data from external sources. How it works, single-source vs waterfall, real examples, and when to enrich vs buy a list.
July 1, 2026
API Enrichment: What It Is and How It Works
An enrichment API turns a name, email, or LinkedIn URL into verified contact data. How it works, what it returns, and what to check before you pick one.
March 4, 2024
Waterfall Enrichment: A Complete Guide for 2026
Waterfall enrichment queries 20+ data providers in sequence for an ~80% find rate — vs 50-60% from any single source. How it works, when to use it, and why it matters.