v0 by Vercel is an AI app builder that turns natural-language prompts into full-stack React applications using Next.js, Tailwind CSS, and shadcn/ui, with a Design Mode for visual edits, GitHub sync, and one-click deployment to Vercel hosting. Aimed at developers and product teams prototyping web apps.

Cursor is an AI-first IDE forked from VS Code, with Tab autocomplete, agentic Composer chat, semantic codebase indexing, a CLI, Slack integration, and cloud agents. Built for developers and engineering teams running frontier models from OpenAI, Anthropic, Google, and xAI inside their editor.

Claude Code is Anthropic's agentic coding tool that reads codebases, edits files, runs tests, and ships pull requests from the terminal, VS Code, JetBrains, Slack, the web, or a desktop app. Built for developers working with Claude Sonnet and Opus models inside their existing stack.