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Sofie Buyse

Sofie Buyse is a Belgian product builder, co-founder of Holmes and previously the first hire and product manager at Henchman, the legal AI startup acquired by LexisNexis for EUR 136.1M in 2024.

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Overview

Buyse joined Henchman as its first employee, working alongside founders Gilles Mattelin, Jorn Vanysacker, and Wouter Van Respaille as the company grew its AI contract-drafting product into more than 170 law firms. Under her tenure, Henchman won a Best UI/UX Design Award. LexisNexis acquired Henchman in July 2024 for EUR 136.1M.

After the Henchman exit, Buyse co-founded Holmes in 2026 with Robin Praet and Robbrecht Delrue. Holmes is an autonomous QA platform for AI-era engineering teams, and launched in May 2026 with a EUR 1.1M pre-Seed round led by Syndicate One.

Buyse is based in Ghent.

Career history

  1. FounderHolmes

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