Guillaume Lebedel

Guillaume Lebedel is a French software engineer and entrepreneur based in London, England. He is the Co-founder and CTO of StackOne, a company building a universal integration layer for SaaS and AI agent use cases. He is active on X as @glebedel.^[1]

Career

Lebedel holds a Master's degree in Computer Science from EPITECH (European Institute of Technology) and studied additionally at California State University, Long Beach. He began his career in A/B testing and analytics at Oracle/Maxymiser, where he met his future co-founder Romain Sestier.

He rose to VP of Engineering at Yieldify (2018–2023), leading global engineering and technical support teams. When Yieldify was acquired by Epsilon, Lebedel and Sestier used the transition to co-found Upper.ai (a data-driven consulting venture) and subsequently launch StackOne.^[2]

StackOne (founded March 2023, London) provides an AI-powered platform enabling developers to build real-time, enterprise-grade integrations for SaaS and AI agent use cases. The company has raised $24.4M from Google Ventures (GV) and Episode 1 Ventures.^[3] Lebedel serves as CTO, described by investors as "a commercial CTO who can simplify complex concepts and align technology with business goals" and "the architect of the unique approach which is critical to StackOne's product."^[4]

Connection to Jan

Jan was contacted by StackOne (via Guillaume or co-founder Matt Carey) following his Twitter activity in early 2025. Jan attended a meeting and declined a full-time offer to join the company, preferring to continue independent work. StackOne was among a list of companies Jan noted he had turned down in May 2025 alongside Skyfire, Composio, Cloudflare, and Social Database.^[5]

See Also

• Jan Wilmake
• Soham_Ganatra