Rockstart is an accelerator and venture capital firm. Based in Amsterdam, North Holland, Netherlands. The known portfolio counts 15 companies, including Refurbi, Tractor Junction, Level Nine, SenseUp Biotechnology, Another Earth and Root Sustainability.
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Investment focus
Who to pitch at Rockstart
Rockstart portfolio companies (15)
- Refurbi
- Tractor Junction
- Level Nine
- SenseUp Biotechnology
- Another Earth
- Root Sustainability
- Geobirds
- Sin Intermediarios
- hackU
- Contribe.io
- Decameal
- EtOH Spirits
- Ora Biotics
- Swetro
- Weseed
Co-investors
Funds that share portfolio companies with Rockstart.
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About Rockstart
The firm's listing covers sectors AI, Climate, Commerce and FinTech, and focus areas AgriTech, Analytics, Biotech and Circular Economy; known deals cluster at Pre-Seed, Seed and Series A.
Of the 14 people on file at Rockstart, Mark Durno (Managing Partner), Max ter Horst (Managing Partner) and Don Ritzen (Founder and advisor) are listed as the contacts to approach first.
Rockstart shares portfolio companies with 20 other investment firms, among them Info Edge Ventures, Epic Angels and Astanor.
Frequently asked questions
What is Rockstart?
Rockstart is an accelerator and venture capital firm based in Amsterdam, North Holland, Netherlands, with a known portfolio of 15 companies. The portfolio comes from public investment records rather than from the firm, so deals that never surfaced publicly are not in it.
What does Rockstart invest in?
Listed sectors include AI, Climate, Commerce and FinTech; listed focus areas include AgriTech, Analytics, Biotech and Circular Economy. Those tags come from the portfolio attached to the firm, so they describe what has been backed rather than a stated mandate for what comes next.
What stage does Rockstart invest at?
The known deals of Rockstart include Pre-Seed, Seed and Series A rounds. Check that against your own round before reaching out: stage mismatch is the most common reason a well matched sector still goes nowhere.
Who should I pitch at Rockstart?
3 of the 14 people on file at Rockstart are listed as contacts for the firm. All 14 have their own profile page.
How do I contact Rockstart?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 14 people attached to the firm have their own pages, each showing whether an address is on file for them.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal