Jonathan Birnbaum
Angel investor in New York City
New York City, New York
Jonathan Birnbaum, Angel investor in New York City is an active investor based in New York City, New York. This profile covers what Jonathan Birnbaum backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelInvestment Bank
- Stages
- Pre SeedSeedSeries BLate Stage Venture
- Invests in
- FintechWealthTechMarketplaceHealthcare & BiotechSaaS & EnterpriseConsumer Goods (CPG)
- Location
- New York City, New York
- Typical check
- $1.6M
- Past investments
- 8
Notable investments
Catalant
AviziaSidekick FundHourlyNerdEat Your Coffee
DocDocBells VenturesDomain MoneyHow to reach Jonathan Birnbaum
Angels and operators like Jonathan Birnbaum reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
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About this profile
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Cite this page
Round Funded. "Jonathan Birnbaum." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jonathan-birnbaum
Frequently Asked Questions
What does Jonathan Birnbaum invest in?
Jonathan Birnbaum invests in Fintech, WealthTech, Marketplace and Healthcare & Biotech, typically at Pre Seed, Seed, Series B and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jonathan Birnbaum invest at?
Jonathan Birnbaum typically invests at Pre Seed, Seed, Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Jonathan Birnbaum's typical check size?
Jonathan Birnbaum typically writes checks around $1.6M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.