RoundOS
Pricing
Sign in
01 · Free data roomBuild, share and track important documents.
Data room analyticsDocument AnalyticsPitch Deck TrackingSecure sharingPermissionsNDA & agreementsWatermarkingVersionsBranding
View all Data Room features →
02 · AI Fundraising CRMRun the work between investor meetings.
Today & next movesFollow-upInvestor researchInvestor CRMInvestor updatesImports & sources
View all Operator features →
See it workingOpen a live roomWalk a real RoundOS room.
PricingSecurity
Deal rooms
StartupsVenture capitalM&A data roomInvestor relations
Beyond fundraising
Sales dealsBoard documentsDue diligenceReal estate
Fundraising
Fundraising hubPre-seedSeedSeries A
Learn
BlogFundingCustomer storiesInvestor room template
Compare
All alternativesBest free data roomsBest DocSend alternativesDigify alternativeiDeals alternative
Free tools & templates
Calculators and fundraising tools. No signup.
SAFE, dilution, runway, pipeline coverage, investor fit.
Sign inExploreData RoomAI Fundraising CRMPricingSecurityDocument AnalyticsPitch Deck TrackingData Room featuresData room analyticsSecure sharingPermissionsNDA & agreementsWatermarkingVersionsBrandingUse casesFundraising hubStartupsVenture capitalM&A data roomInvestor relationsSales dealsBoard documentsDue diligenceReal estatePre-seedSeedSeries AOperatorToday & next movesFollow-upInvestor researchInvestor CRMInvestor updatesImports & sourcesMoreCustomer storiesAll alternativesBest free data roomsInvestor room templateFree toolsBlogFundingIntegrations
Funding/Spiral Hydrogen/Pre-Seed

Spiral Hydrogen: Pre-Seed

Develops bubble-free electrolyser for green hydrogen production

Oct 4, 2026RoundOS

Spiral Hydrogen

Company profile and funding history

Sources

  1. tech.eu
Raised
€2.7M
Round
Pre-Seed
Announced
Apr 30, 2026
Sector
Climate tech
Headquarters
Netherlands

Investors

    All participants (3)
    • byFounders
    • Norrsken Evolve
    • Superangel

    More in Climate tech

    Cyclic Materials · StrategicQuaise Energy · StrategicTeragen Energy · Pre-seed
    Climate techPre-seedEurope