Guillaume Dubray
Managing Partner @ Polytech Ventures
Lausanne, Switzerland
Guillaume Dubray is a seed investor at Polytech Ventures in Lausanne focused on Accounting and Biotechnology. Guillaume Dubray is the Co-Founder at Earny Switzerland. Guillaume Dubray attended Alliance Manchester Business School.
- Total investments:
- 2
- Last investment:
- Lead investor:
- 100%
Last updated:
For AI agents: llms.txt
Industries Guillaume Dubray invests in
Stages Guillaume Dubray invests in
Countries Guillaume Dubray invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Investment Focus
Industry
- Accounting 1 (50%)
- Biotechnology 1 (50%)
- Manufacturing 1 (50%)
- Financial Services 1 (50%)
Investments
Co-Investors
About Polytech Ventures
Polytech Ventures are an early stage VC firm based in Switzerland with a strong international focus. Their strategic location at EPFL in Lausanne grants us access to one of the most dynamic and recognized innovation centers in the world
Polytech Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
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Alexander Fries
Founder
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Guillaume Dubray
Managing Partner
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Jacques Billy
Non Executive Director
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Laurent Bischof
Managing Partner
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Sal Matteis
Managing Partner
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FAQ
What does Guillaume Dubray invest in?
Guillaume Dubray invests primarily in Accounting, Biotechnology and Manufacturing startups, most often at Seed stage. Most of the 2 investments tracked by Shizune back companies in Switzerland. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Guillaume Dubray?
Public channels for Guillaume Dubray include LinkedIn and X (Twitter). 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 Guillaume Dubray last invest?
The most recent investment recorded for Guillaume Dubray closed in Oct 2025. Shizune tracks 2 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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