TanStack Start v1 launches as a production-ready full-stack framework built on TanStack Router and Vite, supporting React and Solid applications. It features type-safe routing and APIs, streaming SSR with hydration, server functions, and universal deployment across platforms like Cloudflare Workers, Netlify, Vercel, and Node/Bun. Performance benchmarks show significant improvements over Next.js in bundle size and metrics. The framework allows incremental adoption for existing TanStack Router applications and includes migration guides for Next.js users, positioning itself as a compelling alternative to established meta-frameworks.