Bu Kinoshita
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Bu Kinoshita is the co-founder and CTO of Resend, an email sending platform launched in 2023, and he is also building react.email. Before Resend, he was the first engineering hire at WorkOS, where he built the first MVP and helped scale it to serve more than 200 B2B SaaS customers. Resend’s public materials list him as one of the company’s three founders. He is also known for building more than 100 Node packages and for the open-source products Taskr and Secret.
Updated 4 September 2026
Public sources: ycombinator.com resend.com
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