
He left Seoul National University to build, entered Y Combinator after a run of LLM experiments, and turned a founder's recurring blank-page problem into Typa. His wager is simple: the future of AI-assisted content begins with a conversation, not a prompt box.
Typa is a YC-backed (S24) AI ghostwriting platform that helps founders, companies, and agencies turn voice notes, links, and stray ideas into on-brand posts across X, LinkedIn, Bluesky, and newsletters. Built by the team behind Weavel, its 24/7 agent 'Puff' learns a user's voice, keeps a self-updating knowledge base of their work, and drafts content for approval before publishing - aiming to make consistent, authentic content possible without burnout.