Devin
Cognition's autonomous AI software engineer ("The AI Software Engineer" per devin.ai), capable of planning, coding, debugging, and deploying complete projects with human-in-the-loop approval. $1B raise at $26B post-money valuation on 2026-05-27 (Series D, led by Lux, General Catalyst, 8VC); combined Cognition+Windsurf ~$492M ARR.
Overview
Devin is Cognition's autonomous AI software engineer — positioned by devin.ai as "The AI Software Engineer" with human-in-the-loop approval. Cognition announced a $1B raise at $26B post-money valuation on 2026-05-27 (Series D, led by Lux, General Catalyst, 8VC), with a combined Cognition+Windsurf run-rate of approximately $492M ARR (up from $37M in May 2025). Cognition acquired Windsurf assets in July 2025.
Capabilities
Devin operates as a virtual team member with its own shell, editor, and browser. It can research APIs, write and debug code, run tests, and deploy applications. It learns from each task and can be assigned increasingly complex projects over time.
Use Cases
Complete application development, legacy code modernization, full-stack feature implementation, autonomous bug fixing, and infrastructure setup.