Compare

Linda vs Vercel AI SDK

Vercel AI SDK is plumbing for streaming LLM responses in Next.js. Linda is an agent runtime for your page. They're complementary — many Linda apps use the Vercel AI SDK underneath for the proxy.

Pick Linda when…

You need an agent loop, not just a streaming chat.
You want a VFS, hooks, skills, multi-agent — not just useChat.
You need browser-side file parsing.
You want framework-agnostic, not Next.js-coupled.

Pick Vercel AI SDK when…

You're building basic chat UI in Next.js and don't need a full agent.
Your AI feature is a thin wrapper over a chat completion.
You don't need tools, multi-agent, or VFS.

They’re not the same thing

Vercel AI SDK is a set of primitives for streaming LLM responses in a React app — useChat, streamText, generateText, tool definitions. It runs partly on your Next.js server, partly in your React client.

Linda is an agent runtime that runs in the browser. It owns the agent loop, the VFS, the chat UI, the file parsers, the multi-agent orchestration, the MCP interop.

Linda and Vercel AI SDK aren’t competitors — they’re at different layers. Many Linda deployments use Vercel AI SDK as the proxy server because it’s already in the Next.js stack.

How they fit together

[React component]  →  Linda  →  agent loop  →  [proxy]  →  LLM
                       ↑                          ↑
              renders chat UI            Vercel AI SDK
              owns the VFS               or @linda/server
              fires hooks                streams responses

When you actually have to choose

You’d pick Vercel AI SDK over Linda when:

Your AI feature is purely a streaming chat — no tools, no multi-step, no page integration.
You’re deeply on Next.js and want the tightest possible integration.
You don’t need a VFS, hooks, skills, multi-agent, or MCP.

You’d pick Linda over Vercel AI SDK when:

Your AI feature needs to do things in the page.
You want a real agent loop, not a single tool call.
You need browser-side file parsing.
You want to ship without Next.js (script tag, vanilla, Svelte, Vue).
You want multi-agent or MCP.

Compare on the dimensions

Dimension	Vercel AI SDK	Linda
Layer	Plumbing	Runtime
Scope	Streaming + tool calling	Full agent: VFS, loop, hooks, skills, multi-agent, MCP
Framework	React (Next.js-first)	Framework-agnostic
Runs where	Client + server	Browser-first (optional proxy)
Agent loop	Single tool call	Continuous loop with workspace
Chat UI	useChat hook	Shadow-DOM overlay
File parsing	None	Browser-side parsers
Multi-agent	Roll your own	Built-in
MCP	Limited	Client + server
Bundle size	~30 KB	~35 KB

The recommendation

If you’re new to LLM apps and on Next.js — start with Vercel AI SDK. It’s the cleanest path to a working chat.

If you outgrow that — you find yourself reinventing tools, agent loops, file handling, state — that’s the moment to look at Linda. You can keep Vercel AI SDK as the proxy and use Linda for the in-page agent. They compose.

FAQ

Can I use both?

Yes — and many people do. Vercel AI SDK as the server-side proxy, Linda as the in-page agent. Linda's @linda/server is a thin alternative if you don't need the rest of the Vercel AI SDK surface.

What about Vercel AI SDK's tool calling?

It's good for one-shot tool calling. Linda's tool loop runs continuously, reading and writing the VFS, until the model calls complete.

Ship an agent-driven flow this afternoon.

Install Linda, paste a config, and your form turns into an agent that fills its own inputs.

Install Linda Browse use cases