Radius was founded by Quentin Romero Lauro in 2025.

Who are Radius's investors?

Radius's investors include Y Combinator, American Express Ventures (Amex), Hashed, Vento.

Where is Radius headquartered?

Radius is headquartered in San Francisco, US.

Radius

YC F25

San Francisco, US · Founded 2025 · 2 employees · 4 known investors

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Radius is a Chromium-based browser for developers that lets coding agents like Claude Code, Codex, and Cursor run in parallel alongside PRs, docs, terminals, and localhost servers in a tabbed interface. It is local-first, scriptable via a CLI, and free to use on macOS.

Also known as Sandbox Technologies INC. · Cheepr.ai · FunForge.ai · Inspector · sandbox.ai · sandbox.ai, Cheepr.ai, FunForge.ai, Inspector, Sol

AI & Machine Learning Developer Tools Enterprise Software SaaS Artificial Intelligence Design Design ToolsUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (F25)

Radius was founded in 2025 by Quentin Romero Lauro.

Quentin Romero Lauro Co-Founder and CEOFounder at Sol

AJ ParkFounder

Alain RossmannFounder

Andy HertzfeldFounder

Burrell SmithFounder

Michael Klikushin Co-Founder & CTOCTO / Founder at Sol

Investors · 4

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us

American Express Ventures (Amex)reported

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

HashedreportedSeoul

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

VentoreportedTorino · $165K – $1.1M

How we know: Y Combinator's founder network · Not right? Tell us

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Companies working in the same space as Radius.

Legal entities · 1

corporate structure

Sandbox Technologies INC.

Frequently asked questions

What does Radius do?: Radius is a Chromium-based browser for developers that lets coding agents like Claude Code, Codex, and Cursor run in parallel alongside PRs, docs, terminals, and localhost servers in a tabbed interface. It is local-first, scriptable via a CLI, and free to use on macOS.
Who founded Radius?: Radius was founded by Quentin Romero Lauro in 2025.
Who are Radius's investors?: Radius's investors include Y Combinator, American Express Ventures (Amex), Hashed, Vento.
Where is Radius headquartered?: Radius is headquartered in San Francisco, US.