Codeium (now rebranded as Windsurf) is an AI code acceleration platform that helps developers write, understand, and refactor code faster using advanced AI. Founded in 2021 by Varun Mohan and Douglas Chen, the company offers free AI-powered autocomplete and chat features that work across 70+ programming languages and integrate with popular IDEs. Codeium has grown to over 1 million users and competes directly with GitHub Copilot. The platform uses proprietary models fine-tuned for coding tasks and offers enterprise features for security-conscious organizations. In 2025, Google signed a licensing deal to acquire Windsurf's technology. Varun Mohan, an MIT graduate of Indian-American origin, has led the company to become one of the leading AI coding assistants.