Prototron fund is an accelerator. Based in Tallinn, Harju, Estonia. Known portfolio companies include Raiku, UP Catalyst, Jälle Technologies, Parcelsea, 10Lines and Captain Corrosion, 10 companies in all.
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Investment focus
- Stage
- Pre-Seed
Contacts
Who to pitch at Prototron fund
Prototron fund portfolio companies (10)
- Raiku
- UP Catalyst
- Jälle Technologies
- Parcelsea
- 10Lines
- Captain Corrosion
- Neurosalience
- Solaride
- Vetik
- Wastefox
Co-investors
Funds that share portfolio companies with Prototron fund.
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About Prototron fund
The firm's listing covers sectors Climate, FinTech, Hardware and Healthcare, and focus areas Circular Economy, Clean Energy, DefenseTech and IoT; known deals cluster at Pre-Seed.
Ivar Siimar (Business Mentor) and Yrjö Ojasaar (Investment Board Member) are listed as the contacts to pitch at Prototron fund.
Across the known portfolio, 17 co-investors appear alongside Prototron fund, including Beamline Accelerator, Little Green Fund and HashKey Capital.
Frequently asked questions
What is Prototron fund?
Prototron fund is an accelerator based in Tallinn, Harju, Estonia, with a known portfolio of 10 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 Prototron fund invest in?
Listed sectors include Climate, FinTech, Hardware and Healthcare; listed focus areas include Circular Economy, Clean Energy, DefenseTech and IoT. 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 Prototron fund invest at?
The known deals of Prototron fund include Pre-Seed 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 Prototron fund?
Both people on file at Prototron fund are listed as contacts for the firm, each with their own profile page.
How do I contact Prototron fund?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 2 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