Windsurf is an AI code editor. It was first built by Codeium, a startup known for free code completion, and launched in November 2024. In July 2025 Google hired Windsurf's chief executive and some staff, and Cognition, the maker of the coding agent Devin, then bought the rest of the company.
The editor is based on Visual Studio Code. Its agent, called Cascade, reads the codebase, edits many files, runs terminal commands and remembers context between sessions. Tab completion predicts the next edit. Users can choose models from several providers, and plugins bring Windsurf features to JetBrains IDEs and other editors. It is available for Mac, Windows and Linux. Previews let developers see a web app inside the editor and click elements to ask for changes.
There is a free plan with limited prompt credits. Pro, Teams and Enterprise plans add more credits and admin controls. Developers and engineering teams at companies of all sizes use it. Cognition is based in San Francisco.