Jan Hammer
Partner at Index Ventures
London, England
Jan Hammer, Partner at Index Ventures is an active investor based in London, England. This profile covers what Jan Hammer backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPEInvestment PartnerFounderInvestor
- Stages
- Early Stage VentureSeries ASeries BLate Stage Venture
- Invests in
- FintechArtificial IntelligenceMarketplacePayments
- Location
- London, England
- Typical check
- $2M
- Past investments
- 35
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productboardHow to reach Jan Hammer
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About this profile
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Cite this page
Round Funded. "Jan Hammer." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jan-hammer
Frequently Asked Questions
What does Jan Hammer invest in?
Jan Hammer invests in Fintech, Artificial Intelligence, Marketplace and Payments, typically at Early Stage Venture, Series A, Series B and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jan Hammer invest at?
Jan Hammer typically invests at Early Stage Venture, Series A, Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Jan Hammer's typical check size?
Jan Hammer typically writes checks around $2M. 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.