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Quentin Romero Lauro and the Trouble Between the Tabs
Before building Radius, the browser formerly known as Sol, Quentin Romero Lauro studied how entrepreneurs and engineers put AI to work. His recurring interest is the awkward space between having a capable tool and knowing what to do with it.
Quentin Romero Lauro Is Folding the IDE Into the Browser
Before his browser became an IDE, Quentin Romero Lauro spent years watching people negotiate with software - Pittsburgh entrepreneurs, AI engineers, and front-end developers included. Now those observations are converging in one small San Francisco company.
Sol Browser
Sol Browser is a San Francisco startup (Y Combinator Fall 2025) building a browser designed to work as a developer's IDE. It lets engineers run multiple AI coding agents - Claude Code, Codex, Cursor - in parallel from browser tabs, alongside terminals, diff viewers, running apps, docs and pull requests. The company began as Inspector, an AI IDE that connected the browser to the codebase so agents could see the same visuals, elements and logs a developer sees, then expanded that idea into a full browser workspace. Founded by Quentin Romero Lauro and Michael Klikushin, it operates as Sandbox Technologies, Inc.