Frank Gruber
Investor at Established Ventures
Portland, Maine
Frank Gruber, Investor at Established Ventures is an active investor based in Portland, Maine. This profile covers what Frank Gruber backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPEInvestor
- Stages
- Pre SeedSeed
- Invests in
- Media & ContentMarketplacePropTech & Real EstateE-commerce & D2CFintech
- Location
- Portland, Maine
- Typical check
- $150K
- Past investments
- 4
Notable investments
FinmarkHow to reach Frank Gruber
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Cite this page
Round Funded. "Frank Gruber." Round Funded investor database, updated September 23, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/frank-gruber
Frequently Asked Questions
What does Frank Gruber invest in?
Frank Gruber invests in Media & Content, Marketplace, PropTech & Real Estate and E-commerce & D2C, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Frank Gruber invest at?
Frank Gruber typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Frank Gruber's typical check size?
Frank Gruber 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.