Castle Island Ventures — 2024 Investments
9 investments dated 2024 · listed companies and verified rows first · show all
Phylax builds the Credible Layer, a policy engine that lets on-chain protocols declare states they must never reach and enforces circuit breakers that reject transactions crossing those limits.
Crypto & Web3CybersecurityEnterprise SoftwareNew York, US
Odyssefs Lamtzidis(Executive Officer, Director)Evangelos Ntomprozis(Executive Officer)
Co-investorsBankless VenturesBreedFigmentHash3 CapitalBreed VCFigment Capital+2 more
Parry builds integrated mission systems combining software, hardware, and AI-enabled autonomy that operate across platforms and environments without requiring custom integration.
AI & Machine LearningDeep TechDefense TechEnterprise SoftwareRoboticsAlexandria, US
Jon Pilon(Executive Officer)inAydin Mohtashamian(Executive Officer)inJohn D Parkes(Executive Officer, Director)in
BoardRobert Miller(Director)David Gross(Director)
Board seatGus Coldebella· per SEC Form D · $90.7M raise · filed Nov 2024
Co-investorsTeamworthy VenturesTrue Ventures
Kintsu is a liquid staking protocol on the Monad blockchain that lets users stake MON tokens and receive sMON liquid staking tokens usable across DeFi for trading, lending, and pooling while earning staking and MEV yield.
Crypto & Web3Fintech
Connor McKenzie(Founder)in
Co-investorsNxGenPragma VenturesPurechain CapitalReciprocal VenturesBrevan Howard DigitalFinTech Collective
Monad is a high-performance EVM-compatible blockchain designed for fast, low-cost transactions.
Cloud ComputingCrypto & Web3Data & InfrastructureCalifon, US
Eunice Giarta Hon(Executive Officer)James Hunsaker(Founder)Keone Hon(Founder)inEunice Giarta(Founder)
Co-investorsAlphaLab CapitalAmbush CapitalArchetypeBankless VenturesBig Brain HoldingsBloccelerate VC+33 more
Mountain Protocol offers a regulated, enterprise-grade stablecoin product designed to pass the "risk free rate" to stablecoin holders, acting as a bridge between crypto and traditional finance markets.
Crypto & Web3Fintech
Martin Carrica(Founder)Matias Caricato(Founder)
Co-investorsCoinbase VenturesDepartment of XYZMulticoin CapitalVenture Dept.Bankless VenturesWormhole Capital
Nirvana Labs provides bare-metal cloud compute instances across three families optimized for different workloads, with pricing up to 37% lower than AWS equivalents.
AI & Machine LearningCloud ComputingData & InfrastructureDeep TechDeveloper ToolsEnterprise Software
Co-investorsCrucible CapitalHash3 CapitalLattice CapitalRaptor GroupVarys CapitalJump Crypto+1 more
SatLayer is a Bitcoin restaking protocol that lets holders deposit Bitcoin or liquid staking tokens into vaults to earn rewards and provide shared security for Bitcoin Validated Services (BVSs).
Crypto & Web3Data & InfrastructureFintech
Luke Xie(Founder)in
Co-investorsAsymmetricBloccelerate VCHack VCBing VenturesMirana VenturesOKX Ventures
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Build on BitcoinSendblocks
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.


































