John Jersin is an angel investor and operator angel based in San Francisco, California, United States with 3 known investments: Outset, Zingbus and Candidate Labs.
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Investment focus
Contacts
John Jersin portfolio companies (3)
- Outset
- Zingbus
- Candidate Labs
Affiliated funds' portfolios
Co-Founder at C3 Ventures, whose known portfolio counts 10 companies
- Momentus
- Modern Health
- Sable
- VenoStent
- Shone
- UBITS
- FREY
- Curebase
- DailyDoctor
- Givefront
Investor Profile
The known portfolio sits in sector Climate, and focus area Mobility.
Stage-wise, the known deals cluster around Seed and Series A rounds.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
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Frequently asked questions
Who is John Jersin?
John Jersin is an angel investor and operator angel based in San Francisco, California, United States with 3 known investments on file, among them Outset, Zingbus and Candidate Labs. The sections above list the sectors, stages and firms attached to that record.
What does John Jersin invest in?
Listed sectors include Climate; listed focus areas include Mobility. 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 John Jersin invest at?
The known deals of John Jersin include Seed and Series A 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 John Jersin listed at?
John Jersin is listed as Co-Founder at C3 Ventures. 2 other people in the database share a firm with John Jersin.
How do I contact John Jersin?
An email address and a LinkedIn page are on file for John Jersin. 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