Devin
Cognition's autonomous AI engineer that plans, codes, tests, debugs, and opens PRs unattended. Now shipped alongside Windsurf (acquired July 2025) as the async half of Cognition's stack — Devin runs async tasks, Windsurf is the in-editor surface.
Lovable
Lovable generates complete full-stack web applications from natural language. It handles frontend, backend, auth, and database — editable in real time.