Sebastien de Halleux
Founding General Partner at Graph Ventures
San Francisco, California
Sebastien de Halleux, Founding General Partner at Graph Ventures is an active investor based in San Francisco, California. This profile covers what Sebastien de Halleux backs, at which stage, and how founders can reach out in 2026.
Sebastien de Halleux is a Founding General Partner at Graph Ventures, with 25 years of experience in scaling frontier technology businesses across gaming, AI, and climate tech.
- Investor type
- VC
- Stages
- SeedEarly Stage Venture
- Invests in
- Gaming & EntertainmentArtificial IntelligenceClimate & Energy
- Location
- San Francisco, California
- Typical check
- $375K
How to reach Sebastien de Halleux
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About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise.
Frequently Asked Questions
What does Sebastien de Halleux invest in?
Sebastien de Halleux invests in Gaming & Entertainment, Artificial Intelligence and Climate & Energy, typically at Seed and Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Sebastien de Halleux invest at?
Sebastien de Halleux typically invests at Seed and Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Sebastien de Halleux's typical check size?
Sebastien de Halleux typically writes checks around $375K. Use it as a signal for whether your raise fits their stage.
How do I contact Sebastien de Halleux?
Unlock Sebastien de Halleux's verified email on Round Funded and send a personalized pitch. We surface only deliverable contacts so your outreach lands.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.