Seth Demsey is an angel investor and operator angel based in Vienna, Virginia, United States with 2 known investments: BuyHappy and Blue Crystal Labs.
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Investment focus
- Stage
- Seed
Contacts
Seth Demsey portfolio companies (2)
- BuyHappy
- Blue Crystal Labs
Affiliated funds' portfolios
Co-CEO at Corvex, whose known portfolio counts 2 companies
- SomaLogic
- EQRx
Investor Profile
The known portfolio sits in sectors Consumer and SaaS, and focus areas Consumer Internet, Data Analytics and Marketing Tech.
Seth Demsey appears in Seed rounds across the known deals.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
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Frequently asked questions
Who is Seth Demsey?
Seth Demsey is an angel investor and operator angel based in Vienna, Virginia, United States with 2 known investments on file, among them BuyHappy and Blue Crystal Labs. The sections above list the sectors, stages and firms attached to that record.
What does Seth Demsey invest in?
Listed sectors include Consumer and SaaS; listed focus areas include Consumer Internet, Data Analytics and Marketing 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 Seth Demsey invest at?
The known deals of Seth Demsey include 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 Seth Demsey listed at?
Seth Demsey is listed as Co-CEO at Corvex, whose known portfolio counts 2 companies.
How do I contact Seth Demsey?
An email address and a LinkedIn page are on file for Seth Demsey. 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