Turnkey, a crypto wallet infrastructure provider, has raised $30 million in a Series B round led by Bain Capital Crypto, with participation from Sequoia, Lightspeed Faction, Galaxy Ventures, Variant, and Wintermute Ventures. The company supports over 50 million wallets and secures billions in crypto assets. Turnkey plans to use the funding to expand its engineering and operations teams, strengthen infrastructure, and accelerate development of its open-source secure operating system, QuorumOS. Known for simplifying secure key management with developer-friendly tools, Turnkey aims to empower scalable financial applications and enhance cross-platform blockchain integration for enterprise-grade wallet and custody solutions.