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Since 2021, Castle Island Ventures has backed 1 African startup across 3 disclosed funding rounds totaling $88M, most heavily in Nigeria and Crypto & Web3.
Castle Island Ventures is a venture capital firm focused exclusively on public blockchains. The firm supports entrepreneurs building infrastructure and application companies for these transformative protocols. It invests in startups across sectors like financial services, enterprise software, cybersecurity, financial market infrastructure, consumer fintech, and new blockchain applications. In Africa, Castle Island Ventures has demonstrated a Pan-African focus through investments in crypto and Web3 infrastructure. The firm participated in three funding rounds for Yellowcard, a stablecoin and fiat payments platform for emerging markets: a Series A of $15.0M in September 2021, a Series B of $40.0M in September 2022, and a Series C of $33.0M in October 2024. These investments span Series A, B, and C stages, totaling $88.0M from September 2021 to October 2024. Castle Island Ventures frequently co-invests with prominent firms such as Third Prime Capital, Polychain Capital, and Valar Ventures, reflecting strong networks in the blockchain investment ecosystem.
Data updated · Jul 29, 2026
Castle Island Ventures has backed 1 African startup across 3 disclosed funding rounds tracked on Liners, totaling $88M since 2021.
Mostly Series C: 1 of its 3 tracked rounds are at that stage, followed by Series B (1).
Castle Island Ventures's tracked rounds are concentrated in Nigeria (3).
Its tracked rounds lean toward Crypto & Web3 (3).
Castle Island Ventures most often shares rounds with Third Prime Capital (3 shared deals), Polychain Capital (2 shared deals), Valar Ventures (2 shared deals).
Yes, Castle Island Ventures has a Pan-African geographic focus. It invested in Yellowcard, a crypto and Web3 stablecoin and fiat payments infrastructure for emerging markets.
Castle Island Ventures backed Yellowcard in three rounds: Series A ($15.0M, Sep 2021), Series B ($40.0M, Sep 2022), and Series C ($33.0M, Oct 2024).
