Claude Code
Terminal-first agentic coding assistant from Anthropic. Full MCP client support, codebase-aware, runs multi-step tasks autonomously.
Jules
Google's async autonomous coding agent powered by Gemini 2.5 Pro. Integrates with GitHub — assign it a task, it runs in a sandboxed VM, and returns a diff or PR. GA since August 2025. Competes directly with Devin and GitHub Copilot Workspace.