Roblox

Roblox was founded in 2004 by David Baszucki and Erik Cassel, who started it in Menlo Park, California. It is headquartered in San Mateo, California, and is listed on the New York Stock Exchange as RBLX, after a direct listing in March 2021. It was incorporated in Delaware and reincorporated in Nevada in May 2025.

It runs a platform where people build and play 3D experiences made by other users. The Roblox Client is the app for playing, Roblox Studio is the free toolset creators build and publish with, and Roblox Cloud is the infrastructure behind both. Creators script in Luau, a language based on Lua with an optional static type system, and Studio includes AI tools such as Assistant, Code Assist and the Cube generative model released in 2025.

According to its annual report for 2025, Roblox had 3,065 full-time employees on December 31, 2025, most of them at the San Mateo headquarters. Its cloud runs on more than 150,000 servers in 25 regional data centers, with some databases, storage and queuing on Amazon Web Services. Its careers board lists roles in San Mateo, Gurugram and Seoul.