Cursor is the strongest fit for building a full-stack web app from scratch, as it is an AI-native code editor that actively writes, edits, and debugs both frontend and backend code alongside you in a real project environment. It understands your entire codebase, can scaffold new files, suggest architecture decisions, and iterate on changes across multiple files at once. Windsurf is a solid alternative at a lower price point with similar agentic coding capabilities. Claude Code works well if you prefer a terminal-first workflow tightly integrated with Anthropic models. GitHub Copilot is worth considering if you are already in the GitHub ecosystem and want inline suggestions without switching editors.