Bill Flagg
Angel investor in Boulder
Boulder, Colorado
Bill Flagg, Angel investor in Boulder is an active investor based in Boulder, Colorado. This profile covers what Bill Flagg backs, at which stage, and how founders can reach out in 2026.
- Investor type
- Angel
- Stages
- Seed
- Invests in
- Healthcare & BiotechSaaS & EnterpriseConsumer & RetailE-commerce & D2CEdTech
- Location
- Boulder, Colorado
- Typical check
- $250K
- Past investments
- 2
Notable investments
PaySimpleSurveyGizmoHow to reach Bill Flagg
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Cite this page
Round Funded. "Bill Flagg." Round Funded investor database, updated September 8, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/bill-flagg
Frequently Asked Questions
What does Bill Flagg invest in?
Bill Flagg invests in Healthcare & Biotech, SaaS & Enterprise, Consumer & Retail and E-commerce & D2C, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Bill Flagg invest at?
Bill Flagg typically invests at Seed. Lead with traction that fits the stage when you reach out.
What is Bill Flagg's typical check size?
Bill Flagg typically writes checks around $250K. 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.