Sjoerd Rietberg is an angel investor and operator angel based in Amsterdam, North Holland, Netherlands. The known portfolio counts 2 companies: BillionToOne and QuantWare.
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Investment focus
- Stage
- Pre-Seed
- Focus
- ProductivitySocial
Contacts
Sjoerd Rietberg portfolio companies (2)
- BillionToOne
- QuantWare
Investor Profile
The listing covers sectors Consumer and SaaS, and focus areas Productivity and Social. Startups operating in these areas may find Sjoerd Rietberg relevant.
Sjoerd Rietberg appears in Pre-Seed rounds across the known deals.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
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Frequently asked questions
Who is Sjoerd Rietberg?
Sjoerd Rietberg is an angel investor and operator angel based in Amsterdam, North Holland, Netherlands with 2 known investments on file, among them BillionToOne and QuantWare. The sections above list the sectors and stages attached to that record.
What does Sjoerd Rietberg invest in?
Listed sectors include Consumer and SaaS; listed focus areas include Productivity and Social. 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 Sjoerd Rietberg invest at?
The known deals of Sjoerd Rietberg include Pre-Seed 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.
How do I contact Sjoerd Rietberg?
A phone number and a LinkedIn page are on file for Sjoerd Rietberg. They are readable inside RaiseHunt after you create an account. The database holds no email address for this profile.
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Data: RaiseHunt investor dataset · Snapshot 6 September 2026 · How this data is built · Report a correction or request removal