Nir Kalkstein is an angel investor and operator angel based in Israel with 2 known investments: Medial EarlySign and Nucleai.
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Investment focus
- Sector
- AIHealthcare
Contacts
Nir Kalkstein portfolio companies (2)
- Medial EarlySign
- Nucleai
Investor Profile
Founders in the listed sectors AI and Healthcare, and focus areas Digital Health, Machine Learning and Market Research will recognize the pattern in this portfolio.
Stage-wise, the known deals cluster around Seed and Series B 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 Nir Kalkstein?
Nir Kalkstein is an angel investor and operator angel based in Israel with 2 known investments on file, among them Medial EarlySign and Nucleai. The sections above list the sectors and stages attached to that record.
What does Nir Kalkstein invest in?
Listed sectors include AI and Healthcare; listed focus areas include Digital Health, Machine Learning and Market Research. 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 Nir Kalkstein invest at?
The known deals of Nir Kalkstein include Seed and Series B 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 Nir Kalkstein?
A phone number and a LinkedIn page are on file for Nir Kalkstein. They are readable inside RaiseHunt after you create an account. The database holds no email address for this profile.
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Data: RaiseHunt investor dataset · Snapshot 6 September 2026 · How this data is built · Report a correction or request removal