Jim Jansen, Venture investor in Amsterdam is an active investor based in Amsterdam, North Holland. This profile covers what Jim Jansen backs, at which stage, and how founders can reach out in 2026.
Jim Jansen is a Venture Partner at Antler and the Founder and CEO of Brownstone, specializing in scaling businesses through digital transformation and AI monetization.
Jim Jansen invests in SaaS & Enterprise and Artificial Intelligence, typically at Seed and Series A.
- Investor type
- VC
- Stages
- SeedSeries A
- Invests in
- SaaS & EnterpriseArtificial Intelligence
- Location
- Amsterdam, North Holland
- Typical check
- $625K
How to reach Jim Jansen
Angels and operators like Jim Jansen 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.
Reach active investors like this one
About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.
Cite this page
Round Funded. "Jim Jansen." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jim-jansen
Frequently Asked Questions
Who is Jim Jansen?
Jim Jansen, Venture investor in Amsterdam is an active investor based in Amsterdam, North Holland. Jim Jansen invests in SaaS & Enterprise and Artificial Intelligence, typically at Seed and Series A.
What does Jim Jansen invest in?
Jim Jansen invests in SaaS & Enterprise and Artificial Intelligence, typically at Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jim Jansen invest at?
Jim Jansen typically invests at Seed and Series A. Lead with traction that fits the stage when you reach out.
What is Jim Jansen's typical check size?
Jim Jansen typically writes checks around $625K. 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.