Claude Code
Terminal-first agentic coding assistant from Anthropic. Full MCP client support, codebase-aware, runs multi-step tasks autonomously.
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.