Janneke Niessen is an angel investor and operator angel based in Amsterdam, North Holland, Netherlands with 4 known investments: Polarsteps, 7write, The Next Closet and Closure.
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Investment focus
Contacts
Janneke Niessen portfolio companies (4)
- Polarsteps
- 7write
- The Next Closet
- Closure
Affiliated funds' portfolios
Co-Founder at CapitalT, whose known portfolio counts 9 companies
- Overstory
- Chapter
- RYE
- AirForestry
- cur8
- trail
- AI-BOB
- Balthazar
- Northsea
Investor Profile
The listing covers sectors AI, Climate, Consumer and SaaS, and focus areas Clean Energy, Climate Tech, E-Commerce and Enterprise SaaS. Startups operating in these areas may find Janneke Niessen relevant.
Stage-wise, the known deals cluster around Seed and Series A rounds.
The portfolio and focus above give founders context on whether Janneke Niessen matches their raise.
Colleagues at CapitalT
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Frequently asked questions
Who is Janneke Niessen?
Janneke Niessen is an angel investor and operator angel based in Amsterdam, North Holland, Netherlands with 4 known investments on file, among them Polarsteps, 7write and The Next Closet. The sections above list the sectors, stages and firms attached to that record.
What does Janneke Niessen invest in?
Listed sectors include AI, Climate, Consumer and SaaS; listed focus areas include Clean Energy, Climate Tech, E-Commerce and Enterprise SaaS. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Janneke Niessen invest at?
The known deals of Janneke Niessen include Seed and Series A rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Janneke Niessen listed at?
Janneke Niessen is listed as Co-Founder at CapitalT. 3 other people in the database share a firm with Janneke Niessen.
How do I contact Janneke Niessen?
An email address and a LinkedIn page are on file for Janneke Niessen. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal