Sebastien de Halleux

Partner atGraph VenturesCalifornia

Sebastien de Halleux is a founding partner at Graph Ventures and an entrepreneur-in-residence at Capricorn Investment Group. He previously held operational roles at Saildrone, Playfish, and Glu Mobile.

What Sebastien can write

Writes checks ofNot reported
Comes in atPre-seed, SeedMostly follows a lead
Best routeA short note on LinkedInA warm intro from a founder they backed works better.

Career

  1. Glu Mobile
  2. Playfish · Co-Founder and COO
  3. Saildrone · COO
  4. Graph Ventures · Founding General Partner
    Now
  5. Capricorn Investment Group · Entrepreneur-in-residence

Companies founded

Graph VenturesPlayfish

Focus

Innovation ManagementEntrepreneurship

Education

Imperial College London, Master’s degree in Civil and Environmental Engineering

Also at Graph Ventures

Alert me when Graph Ventures is active

One email when Sebastien's firm raises a fund, adds a partner or shows new activity.

Founders and investors at a Mode VC gathering

Send Mode VC your deck

Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.

Send your deck

Questions

Who is Sebastien de Halleux?

Sebastien de Halleux is a founding partner at Graph Ventures and an entrepreneur-in-residence at Capricorn Investment Group. He previously held operational roles at Saildrone, Playfish, and Glu Mobile.

How much does Sebastien de Halleux invest?

Graph Ventures has not reported a check size. It invests at pre-seed, seed.

How do I pitch Sebastien de Halleux?

A warm intro from a founder Graph Ventures backed works best. A short LinkedIn note with one line on traction is the next best route.

What did Sebastien de Halleux do before Graph Ventures?

Glu Mobile; Co-Founder and COO at Playfish; COO at Saildrone; Entrepreneur-in-residence at Capricorn Investment Group.

Last updated 2026-10-15. Is this you? Ask for a correction.