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.
Sebastien de Halleux invests in Gaming & Entertainment, Artificial Intelligence and Climate & Energy, typically at Seed and Early Stage Venture.
- Location
- San Francisco, California
- Typical check
- $375K
What does Sebastien de Halleux invest in?
- Investor type
- VC
- Stages
- SeedEarly Stage Venture
Where is Sebastien de Halleux based?
Sebastien de Halleux is based in San Francisco, California.
- Browse more startup investors near Sebastien de Halleux:
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How to reach Sebastien de Halleux
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About this profile
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Round Funded. "Sebastien de Halleux." Round Funded investor database, updated September 23, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/sebastien-de-halleux-san-francisco
Frequently Asked Questions
Who is Sebastien de Halleux?
Sebastien de Halleux, Founding General Partner at Graph Ventures is an active investor based in San Francisco, California. Sebastien de Halleux invests in Gaming & Entertainment, Artificial Intelligence and Climate & Energy, typically at Seed and Early Stage Venture.
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.
Where is Sebastien de Halleux based?
Sebastien de Halleux is based in San Francisco, California.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
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.
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