TanStack Start
Full-stack framework
The full-stack framework for Router-first apps.
Start takes TanStack Router's typed route tree, URL state, loaders, and prefetching, then adds the server pieces: full-document SSR, streaming, server functions, server routes, and build output for the runtime you choose.
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The fastest-growing full-stack framework in the JavaScript ecosystem.
Built on Router
Routes, search, loaders, links
Client-authored, server-powered
SSR, streaming, server functions
Portable output
Cloudflare, Railway, Netlify ready
Application builder
Turn an app idea into a Start-ready implementation plan.
Pick a starting shape, describe the product, and let the builder assemble the TanStack libraries and partner integrations that fit the job. The output is a practical agent prompt, not a generic starter checklist.
Why Start
Most of the framework is the route tree.
If all you need is a SPA router, use Router. Start is for the moment the same app also needs SSR, streaming, server-only work, server routes, middleware, and deployable server output.
Built on TanStack Router
Routes, params, search schemas, loaders, pending states, links, and navigation all come from TanStack Router. Start adds the server and deployment layer around that app model.
URL state is first-class
Search params are parsed, validated, inherited, and written through Router APIs, so filters, tabs, pagination, and deep app state can be shared instead of synchronized by hand.
Server work stays explicit
createServerFn gives loaders, components, hooks, and handlers access to server-only work with validation, serializable boundaries, and same-origin RPC semantics.
SSR keeps the app model
Start can render the full document, stream useful UI, or opt routes into SPA/selective SSR modes while preserving the interactive client-side Router experience.
RC status
Feature-complete, still listening.
The RC API is considered stable and preparing for 1.0. For production apps, lock dependencies to a specific version and keep up with the final feedback, docs polish, and last-mile fixes.
Production RC checklist
Pin the RC Lock Start and Router packages instead of floating on broad ranges.
Track release notes Treat version bumps as planned work and re-run the routes, loaders, and server functions that matter.
Report sharp edges Small reproductions are still valuable while the final docs polish and last-mile fixes land.
Open source ecosystem
Partners and GitHub sponsors stay close to the product story.
Start is built in public, supported by maintainers, partner integrations, and sponsors who help keep the work moving.
Maintainers
Partners
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