Castle Island Ventures

Alkimiya

crypto

Alkimiya provides universal markets for fundamentals, allowing users to trade on metrics like on-chain revenue, stablecoin metrics, and blockspace resources through products like liquid prediction markets and tokenized assets.

Alpen Labs

crypto

Alpen Labs develops Alpen, an EVM-compatible Bitcoin validity rollup and testnet for building Bitcoin-native financial applications. The platform enables developers to deploy smart contracts and build applications involving BTC lending, payments, vaults, and other programmable financial use cases.

Andrena

crypto

Andrena provides high-speed, low-latency internet service to the Mid-Atlantic region of the USA.

Ansible Labs

crypto

Stealth

Arcade.xyz

crypto

Arcade.xyz is a leading decentralized lending platform for NFTs and other crypto assets like ERC20s, memecoins, and RWAs. Operating on Ethereum and Base, it allows users to borrow against their assets through non-liquidatable, peer-to-peer loans with customizable terms or by accepting open offers. The platform is governed by the ArcadeDAO.

Arch Lending

hybrid

Arch Lending provides secure crypto-backed loans.

ARX Research, Inc.

crypto

ARX Research makes secure NFC chips and open-source tools that connect physical items to on-chain assets and smart contracts. Its HaLo chips support cryptographic signing, authentication, and physically backed token use cases for brands, creators, and Web3 projects.

Attestiv

ai robotics

Attestiv provides an AI-powered platform and APIs for validating the authenticity of digital photos, videos, audio, and documents. It helps enterprises in insurance, financial services, cybersecurity, media, and human resources detect manipulation, deepfakes, and fraud through automated analysis and reporting.

Babylon Foundation

crypto

Babylon Foundation is an exempted Cayman Islands foundation company building native use cases for Bitcoin. It provides information and user guides related to Babylon Genesis, BABY addresses, and the Babylon ecosystem.

Beam

crypto

Beam helps businesses send and receive payments by bridging crypto and traditional payment networks.

Birch Hill Holdings

hybrid

Birch Hill Holdings brings traditional credit discipline to onchain finance, building infrastructure for institutions to underwrite, curate, and scale tokenized credit exposure. They serve institutional clients evaluating digital asset credit exposure who need disciplined risk, compliance, and oversight frameworks.

Bitwise

crypto

Bitwise helps institutional and retail investors access cryptocurrency markets through index fund management and investment products.

BlockFi

out of scope

The application process for remediation for BlockFi International clients is now closed. All clients who completed remediation through the Persona portal are being reviewed. Any additional information requests must be answered by August 15th, 2025. BlockFi provides a list of official communication channels for its clients to avoid phishing attempts and scams, advising them to only engage with the listed channels and providing specific email addresses for support or KYC remediation inquiries.

BOB

crypto

BOB is a hybrid Layer 2 that combines Bitcoin security with Ethereum EVM compatibility, enabling users to access DeFi applications and earn yield on Bitcoin.

Casa

crypto

Casa provides non-custodial, self-custody Bitcoin security software and multi-key vaults. It serves individuals, families, businesses, enterprises, and governments seeking to secure bitcoin, stablecoins, and other supported digital assets while retaining control of their keys.

CAT Labs

crypto

CAT Labs develops digital-asset recovery, investigation, and protection tools to fight crypto-enabled crime. It serves government, law enforcement, defense and intelligence agencies, asset-recovery professionals, and crypto businesses.

Cboe Clear U.S.

hybrid

Cboe Clear U.S. (CCUS) is a CFTC-registered derivatives clearing organization (DCO) built to provide institutional-grade clearing infrastructure for emerging asset classes, including digital asset derivatives and event contracts. It serves as the central counterparty for certain digital asset derivatives executed on Cboe Futures Exchange, primarily serving clearing members and institutional market participants.

Chaos Labs

hybrid

Chaos Labs builds enterprise AI infrastructure that helps organizations understand AI work, capture organizational knowledge, and govern AI-generated intelligence. It also operates Chaos AI, a DeFi agent offering structured, executable financial actions.

Coala Pay

hybrid

Coala Pay is a payment platform for humanitarian aid delivery. It helps institutions move funds into difficult corridors quickly using digital currency infrastructure, local payout channels, and compliance-focused audit trails.

Coin Metrics

crypto

Coin Metrics organizes blockchain data and makes it transparent and accessible through market data feeds, on-chain analytics, and risk management tools.

Cyclops

hybrid

Cyclops is an all-in-one crypto and stablecoin platform built exclusively for payments companies, enabling them to accept, settle, convert, and send payouts using crypto and stablecoins. It serves payment processors globally, helping them integrate digital asset capabilities into their existing infrastructure.

delta

fintech

delta provides a mandate-enforcement layer for agentic payments. It evaluates proposed agent actions against signed user mandates and policy before payment release, returning a decision and an auditable execution receipt for platforms handling procurement, payouts, and complex transactions.

DFX Finance

crypto

DFX Finance is the leading crypto FX trading protocol offering permissionless and capital efficient trading for fiat-backed stablecoins.

Dynamic

crypto

Dynamic is an identity and wallet management platform for linking accounts and managing access across Web3 apps.