Sebastien de Halleux
Founding Partner @ Graph Ventures
San Francisco, United States
Sebastien de Halleux is a seed investor at Graph Ventures in San Francisco focused on Software and SaaS. Sebastien de Halleux has a 20-year track-record of launching startups around the world, leading them from idea to success. Sebastien is currently Chief Gaming Officer at Matchday, building a new type of game for football's 5 billion fans. Sebastien is also a founding General Partner at Graph Ventures, an early stage fund with a portfolio of300+ companies including Blue Apron, Ipsy, Envoy, and Dapper Labs. Most recently, Sebastien was Entrepreneur-in-Residence at Capricorn, a pioneering investment group focused on scaling innovative solutions to persistent global problems, including key investments in Tesla, SpaceX, Planet Labs, Quantumscape and Joby Aviation and founding COO of Saildrone, helping launch a category-defining company which revolutionized planetary data collection at sea, using wind and solar powered ocean drones. At the confluence of autonomy, big data and AI/ML, Saildrone pursued a vision called ‘The Quantified Planet’ to help better understand key planetary systems that affect humanity, such as extreme weather, ocean acidification, and global fisheries. Formerly, Sebastien was Co-Founder and COO of Playfish, one of the largest and fastest growing social video games companies which was acquired by Electronic Arts in 2009 (Nasdaq:EA). Prior to founding Playfish, Sebastien helped launch Glu Mobile, an early pioneer in mobile games which IPO'ed in 2007 (Nasdaq:GLUU) and held innovation and strategy roles at Nokia and Booz Allen Hamilton. Sebastien is the recipient of the 2012 EA Emerging Leaders Award, the 2011 Tech 100 award, the 2010 TechFellow award, and the 2003 Booz Allen Professional Excellence Award. His contribution in establishing a successful public-private partnership between Saildrone and the National Oceanic and Atmospheric Administration (NOAA) was recognized with the 2020 Ron Brown Excellence in Innovation Award and the 2018 US Department of Commerce Bronze Medal. Sebastien has served on the boards of Saildrone, Samasource, Vittana, UWC-USA, the Solar Fuel Institute, and Trusted Family. Sebastien holds a Master’s degree in Civil and Environmental Engineering from Imperial College London and is a Henry Crown Fellow at the Aspen Institute.
- Total investments:
- 17
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Sebastien de Halleux invests in
Stages Sebastien de Halleux invests in
Countries Sebastien de Halleux invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $4.3M–$9M
Investment Focus
Industry
- Software 3 (18%)
- SaaS 2 (12%)
- Transportation 2 (12%)
- Marine Transportation 2 (12%)
- B2B 1 (6%)
Stage
- Seed 10 (59%)
- Pre-Seed 4 (24%)
- Angel 1 (6%)
- Series A 1 (6%)
- Funding Round 1 (6%)
Country
- United States 9 (53%)
- France 1 (6%)
- Belgium 1 (6%)
- Switzerland 1 (6%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Kosmik is a visual collaboration platform. Kosmik is based around a zooming user interface where you can store and edit any type of data. Kosmik is the first "dSaaS" (decentralized Software as a Service), relying on a custom designed peer-to-peer database, maximizing user privacy, offering offline first comfort and end to end encryption. | Seed / May 15, 2022 | ||
Wet Dog Weather
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Wet Dog Weather makes a SaaS platform for weather and sensor data dissemination and display. Our focus is on fact, interactive, and performant interactive data visualization. | $600K / Pre-Seed / Mar 01, 2022 | |
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Wet Dog Weather
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Wet Dog Weather makes a SaaS platform for weather and sensor data dissemination and display. Our focus is on fact, interactive, and performant interactive data visualization. | Seed / Jan 01, 2022 | |
| Formally is a legal collaboration company seeking to use intelligent technology and accessible design to simplify legal processes and increase access to justice. | Seed / Nov 09, 2021 | ||
| PCUBE-LAB are developing NeuroClues, a solution to instantaneously quantify your clinical exam based on a portable laboratory using eye tracking. | $4.9M / Seed / Nov 08, 2021 | ||
| ClearSpace is a spin-off of EPFL and was founded in early 2018 to lead the development of sustainable in-orbit services in the tracks of the EPFL CleanSpace One (CSO) mission. ClearSpace develops on-orbit technologies and provides services for non-functional satellites in orbit. ClearSpace has signed a service contract with ESA to lead the firstmission to remove a Space Debris autonomously called ClearSpace-1. | $4.3M / Seed / Jun 30, 2021 | ||
| SailPlan simplifies the way ships, yachts, and the marine industry collects, processes, and analyzes data. We specialize in providing customized data infrastructure solutions for marine applications that help improve their efficiency, safety, and profitability. | Pre-Seed / Jun 01, 2021 | ||
| Cut+Dry is a unified digital ordering and payment platform that allows restaurants to identify, purchase, and pay for any product. | Seed / May 05, 2021 | ||
| MightyFly is enabling worldwide access to goods with fast, on-demand delivery services for businesses and consumers. We’re putting the infrastructure in place to connect remote locations together with long range, heavy cargo aircraft. Many areas in the world today suffer from an inability to obtain critical and often urgently needed goods andsupplies at an affordable cost. Our goal at MightyFly is to solve this problem through express, customized aerial drone delivery services. MightyFly drones will transport cargo to multiple locations in a single flight across hundreds of miles of remote terrain that is difficult if not impossible to cross with trucks or other ground vehicles. We are developing vertical-takeoff-and-landing (VTOL) drones that fly more than 300 miles, and carry payloads in excess of 50 pounds at a fraction of the cost of helicopters. Featuring automated cargo loading and unloading, and requiring no launch or recovery infrastructure, MightyFly drones will accommodate ad-hoc deliveries to undeveloped sites as well as servicing locations along established routes. | $5.1M / Seed / Apr 20, 2021 | ||
| Regent develops an electric boat-flying machine for coastal transportation. The company designs and manufactures electric flying machines that will transport commercial passengers. The vehicle, known as a seaglider, is a wing-in-ground-effect craft that operates a few meters above the water's surface and combines an airplane's high speedwith a boat's low operating cost. Seagliders are designed to travel at speeds of up to 180 mph (290 km/h) with a range suitable for regional trips, connecting coastal cities and islands. The company aims to revolutionize regional transportation by creating fast, efficient, and sustainable seagliders that connect coastal communities. | $9M / Seed / Apr 13, 2021 | ||
| See all 17 investments → | |||
Co-Investors
About Graph Ventures
Graph Ventures is an investment group that specializes in seed and early-stage venture investments. It was founded in 2011. Investments include: * BetterUp * Birdies * BlueApron * Dapper Labs * Earnin * Envoy * Hinge * Houseparty * Ipsy * Loft * Lever * Lingokids * Moon Express * Papaya * PicsArt * Porch * Quinto Andar * RideOS * Saildrone *Very Good Security * VivaReal * Zeplin
Graph Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Brian Truong
Partner
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Matt Wyndowe
Founding Partner
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Razmig Hovaghimian
Partner
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Sebastien de Halleux
Founding Partner
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Alexandra Brown
COO & Partner
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FAQ
What does Sebastien de Halleux invest in?
Sebastien de Halleux invests primarily in Software, SaaS and Transportation startups, most often at Seed and Pre-Seed stage. Most of the 17 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Sebastien de Halleux's check size?
Sebastien de Halleux typically joins rounds of $4.3M–$9M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Sebastien de Halleux participates in.
How do I contact Sebastien de Halleux?
Public channels for Sebastien de Halleux include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Sebastien de Halleux last invest?
The most recent investment recorded for Sebastien de Halleux closed in May 2022. Shizune tracks 17 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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