Fundraising Fox
Jan Hammer
InvestorInvestor at Index Ventures
London
Writes $500K – $50M checks · typically $15M
Midas 2026 · #79Midas 2025 · #50Midas 2024 · #59Midas 2023 · #18Midas 2022 · #17Midas 2021 · #14Midas 2020 · #47Midas 2019 · #38Midas 2018 · #100
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About
Jan Hammer specializes in backing formative, non-obvious startups rebuilding finance and data infrastructure—favoring full-stack fintech approaches (e.g., Adyen) and early bets on companies like Collibra, Wise and Robinhood.
Contact· self-published, not guessed
Invests in
ConsumerEnterprise SoftwareSaaS
Deals · 1
Cowboy Space CorporationQuoted
via Index Ventures · filed Apr 2026
Attribution from SEC filings, press coverage, and firm rosters.
Other disclosed investments
Investor
AdfinAdyenAdyenAlanApronAtlarBeameryBehavoxBitPayCapitolisClauseMatchCodatCollibraComply AdvantageCordCredit BenchmarkDuffelDunaDuvoDuvoaiFastGeophyHarmonicJust Eat Takeaway.comMistral AIMitti (by SafetyCulture)MomentMontonioNovusOANDAProductboardRemoteResistant AIRobinhoodRobinhoodRohlikSafety CultureSeedLegalsSilverfinSocialbakersSofíaSolvoSpiko Paris, FranceTacticTebiTema GlobaltopiTransakValderaWiseZendesk New YorkZuora
Per curated public sources.
Colleagues at Index Ventures
Network16
▶4 more connections
Emil Schaefer · scoutErik Kriessmann · scoutTerrence Rohan · scoutTheo Osborne · scout
Investors connected to Jan in public investor directories — a warm-intro map.
Frequently asked questions
- Who is Jan Hammer?
- Jan Hammer specializes in backing formative, non-obvious startups rebuilding finance and data infrastructure—favoring full-stack fintech approaches (e.g., Adyen) and early bets on companies like Collibra, Wise and Robinhood.
- Where does Jan Hammer work?
- Jan Hammer is Investor at Index Ventures.
- What does Jan Hammer invest in?
- Jan Hammer invests in Consumer, Enterprise Software, SaaS.
- What check size does Jan Hammer write?
- Jan Hammer typically writes checks of $500K – $50M.
- What companies has Jan Hammer invested in?
- Investments tracked here include Adfin, Adyen, Adyen, Alan, Apron, Atlar, Beamery, Behavox, BitPay, Capitolis, ClauseMatch, Codat, and 41 more.
About this profile. Compiled from public sources — Index Ventures's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights