The agentic AI IDE that keeps developers in flow
HQ: Mountain View, CA, United States | Founded: 2021 | Employees: ~250 (peak 2025) | Stage: Acquired — Cognition (Jul 2025) after Google licensing deal | Website: https://windsurf.com
Windsurf was founded in June 2021 in Mountain View, California, by MIT classmates Varun Mohan (CEO) and Douglas Chen. The company began as Exafunction, a GPU virtualization platform optimizing utilization at scale, before pivoting in 2022 to Codeium as generative AI created a larger opportunity in developer tools. Its first product was a free, fast autocomplete extension for 70+ languages and all major IDEs, which grew to over 800,000 developers and 1,000 enterprise customers by 2024. In April 2024 the company rebranded from Codeium to Windsurf, signaling a shift from plugin to full AI-native IDE — the Windsurf Editor — built around its agentic AI system Cascade that can reason across entire codebases, edit multiple files, run terminals, and keep developers in flow.
The rebrand and agentic strategy drove explosive commercial growth: ARR grew from ~$40M in early 2025 to a reported peak near $100M in April 2025, attracting a $3 billion acquisition agreement with OpenAI in May 2025. When that deal's exclusivity expired, Google executed a $2.4 billion reverse acqui-hire in July 2025, hiring Mohan, Chen, and ~40 research and engineering leaders into Google DeepMind alongside a non-exclusive technology license. Days later, Cognition — maker of the autonomous coding agent Devin — acquired the remaining Windsurf entity (IP, product, brand, customers, and ~200 employees) for a reported ~$250M, ensuring continuity for users while consolidating two leading agentic coding platforms under one roof.
Windsurf exemplifies both the ferocity of the AI coding tools race and the strategic value of agentic IDEs. From GPU virtualization (Exafunction) to mass-market autocomplete (Codeium) to full agentic IDE (Windsurf Editor + Cascade), the company executed two sharp pivots, reached ~$100M ARR, and triggered consecutive $3B and $2.4B transactions within 60 days. Its IP now powers Google DeepMind's agentic coding efforts and Cognition's Devin platform — a rare split outcome that rewarded founders and investors at ~4x while leaving operational continuity under Cognition.
Browse: Home | Blog | About | All Startups A-Z | View full profile on StartupWiki