Jeff Stein
Angel investor in Boston
Boston, Massachusetts
Jeff Stein, Angel investor in Boston is an active investor based in Boston, Massachusetts. This profile covers what Jeff Stein backs, at which stage, and how founders can reach out in 2026.
- Investor type
- Angel
- Stages
- Pre SeedSeed
- Invests in
- SaaS & EnterpriseConsumer & RetailClimate & EnergyDeveloper Tools & DataMobility & LogisticsSupply Chain & LogisticsMedia & ContentMarketing & AdTech
- Location
- Boston, Massachusetts
- Typical check
- $150K
- Past investments
- 1
Notable investments
How to reach Jeff Stein
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About this profile
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Cite this page
Round Funded. "Jeff Stein." Round Funded investor database, updated September 8, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jeff-stein
Frequently Asked Questions
What does Jeff Stein invest in?
Jeff Stein invests in SaaS & Enterprise, Consumer & Retail, Climate & Energy and Developer Tools & Data, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jeff Stein invest at?
Jeff Stein typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Jeff Stein's typical check size?
Jeff Stein typically writes checks around $150K. 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.