John M. Cioffi is an angel investor and operator angel based in Redwood City, California, United States with 6 known investments: Altobeam, ClariPhy Communications, PHYTunes, Collinear Networks, Coppercom and Teknovus.
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Investment focus
- Stage
- Seed
- Focus
- BiotechClean EnergyCloud InfrastructureDevOpsEnterprise SaaSFiber NetworkingSemiconductors
Contacts
John M. Cioffi portfolio companies (6)
- Altobeam
- ClariPhy Communications
- PHYTunes
- Collinear Networks
- Coppercom
- Teknovus
Investor Profile
The listing covers sectors Climate, Hardware, Healthcare and SaaS, and focus areas Biotech, Clean Energy, Cloud Infrastructure and DevOps. Startups operating in these areas may find John M. Cioffi relevant.
John M. Cioffi 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 John M. Cioffi?
John M. Cioffi is an angel investor and operator angel based in Redwood City, California, United States with 6 known investments on file, among them Altobeam, ClariPhy Communications and PHYTunes. The sections above list the sectors and stages attached to that record.
What does John M. Cioffi invest in?
Listed sectors include Climate, Hardware, Healthcare and SaaS; listed focus areas include Biotech, Clean Energy, Cloud Infrastructure and DevOps. 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 M. Cioffi invest at?
The known deals of John M. Cioffi 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.
How do I contact John M. Cioffi?
An email address, a phone number and a LinkedIn page are on file for John M. Cioffi. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal