Jeff Sinclair
Angel investor in Stamford
Stamford, Connecticut
Jeff Sinclair, Angel investor in Stamford is an active investor based in Stamford, Connecticut. This profile covers what Jeff Sinclair backs, at which stage, and how founders can reach out in 2026.
Mr. Jeff Sinclair is an Angel Investor. He served as Product Manager, Engagement Platform at Atlassian.
- Investor type
- Angel
- Stages
- Early Stage Venture
- Invests in
- Artificial IntelligenceFintechPaymentsSaaS & EnterpriseCrypto & Web3Consumer & RetailConsumer Goods (CPG)E-commerce & D2C
- Location
- Stamford, Connecticut
- Typical check
- $500K
- Past investments
- 1
Notable investments
How to reach Jeff Sinclair
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About this profile
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Cite this page
Round Funded. "Jeff Sinclair." Round Funded investor database, updated September 8, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jeff-sinclair
Frequently Asked Questions
What does Jeff Sinclair invest in?
Jeff Sinclair invests in Artificial Intelligence, Fintech, Payments and SaaS & Enterprise, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jeff Sinclair invest at?
Jeff Sinclair typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Jeff Sinclair's typical check size?
Jeff Sinclair typically writes checks around $500K. 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.