Windsurf is an AI native IDE built on VS Code that integrates its Cascade agent directly into the coding experience. Originally launched as Codeium (a free Copilot alternative), the product rebranded in late 2024 and shifted from autocomplete tooling to a full agentic IDE where the AI understands your entire codebase and can plan multi step edits across files.
Cascade is the core differentiator. It indexes your project through a proprietary system called Fast Context, building an understanding of your architecture and dependencies without requiring you to manually tag files or configure anything. The Memories feature learns your coding patterns over approximately 48 hours of active use, making suggestions progressively more accurate and aligned with your personal conventions. This creates a noticeably different experience from tools that treat every session as a blank slate.
In December 2025, Cognition AI (the company behind the autonomous coding agent Devin) acquired Windsurf for approximately $250 million. At the time, Windsurf had $82 million in ARR, over 350 enterprise customers, and a team of 210. Google secured a separate licensing deal for the underlying technology. As of March 2026, the two products remain largely separate, but the roadmap points toward merging Cascade IDE intelligence with Devin autonomous execution.
Pricing shifted in March 2026 from credits to a quota based system. Pro starts at $20 per month with access to SWE 1 (Windsurf proprietary models), Claude Sonnet, and GPT class models. Quota refreshes on daily and weekly cycles rather than monthly pools, which prevents burning your entire allocation in a single intensive session but also means you cannot sprint through complex work without hitting limits.
Windsurf ranked number one in the LogRocket AI Dev Tool Power Rankings as of February 2026, ahead of both Cursor and GitHub Copilot. For developers evaluating the category, it occupies a specific position: deeper automatic codebase context than Cursor, a strong beginner friendly reputation, and an uncertain but potentially transformative acquisition trajectory.