Stefan Haeckel
Angel investor in Vienna
Vienna, Vienna
Stefan Haeckel, Angel investor in Vienna is an active investor based in Vienna, Vienna. This profile covers what Stefan Haeckel backs, at which stage, and how founders can reach out in 2026.
Mr. Stefan Hackel is an Angel Investor.
- Investor type
- Angel
- Stages
- Early Stage Venture
- Invests in
- Climate & EnergyFintechMarketplace
- Location
- Vienna, Vienna
- Typical check
- $500K
- Past investments
- 5
Notable investments
myClubsbackbone.oneWatt AnalyticsrefinqHow to reach Stefan Haeckel
Angels and operators like Stefan Haeckel 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. "Stefan Haeckel." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/stefan-haeckel-155623-4
Frequently Asked Questions
What does Stefan Haeckel invest in?
Stefan Haeckel invests in Climate & Energy, Fintech and Marketplace, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Stefan Haeckel invest at?
Stefan Haeckel typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Stefan Haeckel's typical check size?
Stefan Haeckel 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.