Claude Code

Agentic coding tool that operates as a CLI, desktop app, web app, and IDE extension. Understands full codebases, runs commands, edits files, and manages git workflows. Supports hooks, MCP servers, and custom agent skills.

Reached $1B ARR by November 2025, growing to $2.5B+ by March 2026 — one of the fastest-growing software products ever. Launched as research preview alongside Claude 3.7 Sonnet, GA with Claude 4.