Project Eleven, which builds tools to prepare blockchains for post-quantum threats, raised a $20M Series A led by Castle Island at a $120M post-money valuation (Yogita Khatri/The Block)

Yogita Khatri / The Block: Project Eleven, which builds tools to prepare blockchains for post-quantum threats, raised a $20M Series A led by Castle Island at a $120M post-money valuation  —  Partner offers  —  Quick Take  — Project Eleven has raised a $20 million Series A funding at a $120 million valuation in a round led by Castle Island Ventures.

Jan 14, 2026 - 21:00
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Project Eleven, which builds tools to prepare blockchains for post-quantum threats, raised a $20M Series A led by Castle Island at a $120M post-money valuation (Yogita Khatri/The Block)

Yogita Khatri / The Block:
Project Eleven, which builds tools to prepare blockchains for post-quantum threats, raised a $20M Series A led by Castle Island at a $120M post-money valuation  —  Partner offers  —  Quick Take  — Project Eleven has raised a $20 million Series A funding at a $120 million valuation in a round led by Castle Island Ventures.

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