Investor profile
Sebastien de Halleux
Angel, Operator angel & Founding General Partner at Graph Ventures
An angel investor and operator angel based in San Francisco, California, United States, Sebastien de Halleux has 10 known investments: Regent, ClearSpace, MightyFly, Realo, SailPlan, TalentWorks, Kosmik, Cut+Dry, Formally and Wet Dog Weather.
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Investment focus
Contacts
Sebastien de Halleux portfolio companies (10)
- Regent
- ClearSpace
- MightyFly
- Realo
- SailPlan
- TalentWorks
- Kosmik
- Cut+Dry
- Formally
- Wet Dog Weather
Affiliated funds' portfolios
Founding General Partner at Graph Ventures, whose known portfolio counts 10 companies
- Lava
- Ximple
- Sage Care
- Circuit & Chisel
- Perena
- Froot Pops
- Chariot Claims
- Elmnts
- LAAM
- XY.AI Labs
Investor Profile
Founders in the listed sectors FinTech, Hardware and SaaS, and focus areas Data Analytics, Enterprise SaaS, Gaming and HR Tech will recognize the pattern in this portfolio.
Stage-wise, the known deals cluster around Pre-Seed and Seed rounds.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
Colleagues at Graph Ventures
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Frequently asked questions
Who is Sebastien de Halleux?
Sebastien de Halleux is an angel investor and operator angel based in San Francisco, California, United States with 10 known investments on file, among them Regent, ClearSpace and MightyFly. The sections above list the sectors, stages and firms attached to that record.
What does Sebastien de Halleux invest in?
Listed sectors include FinTech, Hardware and SaaS; listed focus areas include Data Analytics, Enterprise SaaS, Gaming and HR Tech. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Sebastien de Halleux invest at?
The known deals of Sebastien de Halleux include Pre-Seed and Seed rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Sebastien de Halleux listed at?
Sebastien de Halleux is listed as Founding General Partner at Graph Ventures. 4 other people in the database share a firm with Sebastien de Halleux.
How do I contact Sebastien de Halleux?
An email address and a LinkedIn page are on file for Sebastien de Halleux. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal