Is Next.js on the Way Out? Meet the New React Powerhouse: TanStack Start

In recent months, several AI companies—including T3 Chat, Anthropic, and Lovable—have migrated away from Next.js, all choosing the same technology stack built around TanStack.

TanStack Start Is Rising Fast

Many developers still associate TanStack with React Query, but today TanStack has grown into a complete ecosystem:

TanStack Query

TanStack Router

TanStack Form

TanStack Table

TanStack Start

TanStack DB

TanStack AI

The most noteworthy component is TanStack Start, a full‑stack React framework launched by TanStack.

It supports SSR, SSG, CSR, Streaming, Server Functions, and Type‑Safe Routing, and is built on Vite + TanStack Router rather than the traditional Next.js stack.

React full‑stack framework finally redesigned.

The design eliminates hidden runtime mechanisms and complex magic, making behavior explicit and type‑safe, which benefits both human developers and AI agents.

Why AI Companies Choose TanStack

Historically, the React world equated the standard answer to React = Next.js. With the rise of AI, evaluation criteria have shifted from community size and ecosystem maturity to:

Ease of understanding project structure for AI

Ease of generating code with AI

Ease of maintaining large codebases with AI

TanStack’s explicit‑over‑magic philosophy—"Explicit > Magic"—and its type‑safe approach align perfectly with these new priorities.

TanStack AI Is the Real Game‑Changer

Beyond a simple AI SDK, TanStack AI provides a comprehensive AI application infrastructure, including:

Agent

Tool Calling

Middleware

Workflow

Orchestrator

Streaming

React Hooks

React Native

The highlighted features are Workflow and Orchestrator . Workflow defines a fixed sequence: A → B → C → D Orchestrator lets an Agent decide the next step dynamically based on current state:

A
↓
AI decision
↓
B or C or D

This dynamic capability is a core future strength for AI agent systems.

TanStack’s Expanding Ambition

Looking at the past six months, TanStack is no longer satisfied with a few React utility libraries; it is building a complete AI‑native development ecosystem:

TanStack Query
      ↓
TanStack Router
      ↓
TanStack Start
      ↓
TanStack DB
      ↓
TanStack AI

The stack covers state management, routing, full‑stack framework, database, and finally an AI agent runtime, nearly spanning the entire AI application development workflow.

June 11 Announcement

TanStack recently released a teaser poster announcing a new wave on June 11, hinting at heavier product releases that may include a more complete AI platform or new cloud services.

Conclusion

Will Next.js be eliminated? The author answers “No.” Next.js will retain the largest React community, a mature enterprise ecosystem, and strong Vercel support for years to come. However, an increasing number of AI companies are adopting TanStack as their default stack, and the next major battle in the React world may revolve around the TanStack ecosystem rather than Next.js alone.