Romain Sestier

Romain Sestier is the Co-founder & CEO of StackOne, the integration gateway for AI Agents and SaaS. Backed by GV and Workday Ventures, StackOne lets builders ship secure, native integrations in days, not months, via unified APIs and AI Actions that power real-time workflows across Knowledge, HR, Ticketing and adjacent categories. Before founding StackOne, Romain built and scaled developer platforms and integration ecosystems at Google and high-growth B2B SaaS companies, bridging product, engineering, and go-to-market.