Paul Klein IV is a San‑Francisco‑based serial entrepreneur and engineer. After honing his chops at Twilio during its IPO and founding Stream Club—a live‑streaming platform acquired by Mux in 2021 he launched Browserbase in 2024 to give developers and AI agents fast, reliable, multi‑region browser infrastructure. In its first 14 months, Klein raised $67.5 million (led by CRV, Kleiner Perkins, Notable Capital, and Okta Ventures over multiple rounds). He views Browserbase as the “last‑mile” interface between large language models and the web, enabling end‑to‑end browser automation far beyond traditional scraping.