Castle Island Ventures

Alpen Labs is a startup focused on enhancing Bitcoin scalability through zero-knowledge technology. The company aims to create a comprehensive financial ecosystem that promotes privacy and programmability within Bitcoin. By developing an online platform, Alpen Labs seeks to foster broader adoption of cryptocurrency and expand global financial access. Its infrastructure empowers developers to build applications directly on this platform, facilitating an inclusive financial future for everyday users. Through its innovative approach, Alpen Labs is positioned to significantly contribute to the evolution of the cryptocurrency landscape.

Hata is a regulated platform facilitating transactions between businesses and consumers, enabling access to cryptocurrencies using fiat currencies like the US Dollar and Malaysia Ringgit. It aims to provide safe and effortless access to cryptocurrency for all users through its commitment to customer service and regulatory compliance.

SatLayer is a stealth-mode startup developing a modular security platform specifically designed for Bitcoin. Its core offering, Bitcoin Validated Service (BVS), aims to bolster the security of decentralized applications (dApps) and protocols within the cryptocurrency ecosystem.

Build on Bitcoin is a hybrid Layer-2 network Bitcoin blockchain

Alpen Labs is a startup focused on enhancing Bitcoin scalability through zero-knowledge technology. The company aims to create a comprehensive financial ecosystem that promotes privacy and programmability within Bitcoin. By developing an online platform, Alpen Labs seeks to foster broader adoption of cryptocurrency and expand global financial access. Its infrastructure empowers developers to build applications directly on this platform, facilitating an inclusive financial future for everyday users. Through its innovative approach, Alpen Labs is positioned to significantly contribute to the evolution of the cryptocurrency landscape.

Developer of an online trading platform intended to facilitate buying and selling of cryptocurrencies. The company's platform helps to open and close positions directly from digital wallets, enabling crypto traders to improve return on investment.

Mash is a developer of an online financial platform that aims to address the challenges of monetization on the internet. The company facilitates value-for-value exchanges between content creators, organizations, and their audiences, promoting a new business model for the open internet. By providing friction-minimized streaming payments that are low-cost and instantly settled, Mash enables clients to effectively monetize their digital experiences through active user engagement. This innovative approach is designed to unlock new ways for producers and consumers to interact, enhancing the overall value exchange in the digital landscape. The platform operates on a foundation built around Bitcoin and the Lightning Network, although users do not need to have extensive knowledge of these technologies to benefit from the service.

Hoseki is developing infrastructure to facilitate secure and convenient proof of Bitcoin reserves, aiming to establish Bitcoin as the global monetary standard.

Eaglebrook Advisors is a cryptocurrency-focused investment firm that specializes in providing financial advisors with access to bitcoin through its proprietary asset management platform. The firm offers a range of services designed to facilitate the management of digital investments, including portfolio integration, institutional custody, tax optimization, and liquidation strategies. By prioritizing security and compliance, Eaglebrook Advisors aims to simplify the investment process for financial advisors, enabling them to effectively manage and optimize their clients' cryptocurrency assets.

Mash is a developer of an online financial platform that aims to address the challenges of monetization on the internet. The company facilitates value-for-value exchanges between content creators, organizations, and their audiences, promoting a new business model for the open internet. By providing friction-minimized streaming payments that are low-cost and instantly settled, Mash enables clients to effectively monetize their digital experiences through active user engagement. This innovative approach is designed to unlock new ways for producers and consumers to interact, enhancing the overall value exchange in the digital landscape. The platform operates on a foundation built around Bitcoin and the Lightning Network, although users do not need to have extensive knowledge of these technologies to benefit from the service.

River Financial Inc. is a financial technology company based in San Francisco, California, founded in 2019 by Alexander Leishman and Andrew Benson. The company specializes in providing a platform for individuals and institutions to buy, manage, and sell bitcoin. Its flagship product is a Bitcoin brokerage designed for sophisticated retail investors, offering a high-touch service that prioritizes security and client experience. River Financial's platform includes tools for investment performance, such as cost basis tracking, catering to the needs of its clients in the evolving cryptocurrency market.

Hoseki is developing infrastructure to facilitate secure and convenient proof of Bitcoin reserves, aiming to establish Bitcoin as the global monetary standard.

River Financial Inc. is a financial technology company based in San Francisco, California, founded in 2019 by Alexander Leishman and Andrew Benson. The company specializes in providing a platform for individuals and institutions to buy, manage, and sell bitcoin. Its flagship product is a Bitcoin brokerage designed for sophisticated retail investors, offering a high-touch service that prioritizes security and client experience. River Financial's platform includes tools for investment performance, such as cost basis tracking, catering to the needs of its clients in the evolving cryptocurrency market.

Flipside Crypto, Inc. is a Boston-based company founded in 2017 that specializes in providing analytics and business intelligence for blockchain organizations. The company offers a range of services, including cryptocurrency management, digital walleting, custody services, and portfolio dashboards aimed at investors. Flipside Crypto is known for its suite of analytics tools that deliver insights into user behaviors, developer activities, and financial metrics, including the Fundamental Crypto Asset Score (FCAS), which measures the health of cryptocurrency projects. The company collaborates with various partners to distribute its analytics, enhancing the visibility and understanding of cryptocurrency markets. Flipside Crypto is supported by notable investors, including Coinbase Ventures and True Ventures.

Flipside Crypto, Inc. is a Boston-based company founded in 2017 that specializes in providing analytics and business intelligence for blockchain organizations. The company offers a range of services, including cryptocurrency management, digital walleting, custody services, and portfolio dashboards aimed at investors. Flipside Crypto is known for its suite of analytics tools that deliver insights into user behaviors, developer activities, and financial metrics, including the Fundamental Crypto Asset Score (FCAS), which measures the health of cryptocurrency projects. The company collaborates with various partners to distribute its analytics, enhancing the visibility and understanding of cryptocurrency markets. Flipside Crypto is supported by notable investors, including Coinbase Ventures and True Ventures.