Compare

Linda vs Stagehand

Stagehand automates a browser from the server with act/extract/observe primitives. Linda is the same primitives, on the user's browser, with their consent. Different problems.

Pick Linda when…

Your user owns the browser — you're shipping a product to them.
The agent should ask the user, not automate them.
You need a chat UI.
You want browser-side file parsing.
You don't want to pay for browser infrastructure.

Pick Stagehand when…

You're automating sites you don't own from a server.
You need headless browsers at scale.
Your use case is data extraction, scraping, or web testing.
You're already on Browserbase / Playwright infra.

The orthogonal axis

Stagehand and Linda look similar — both have act, extract, observe primitives. They’re solving opposite problems:

Stagehand: “I want an agent to operate a browser for me.” → Headless. Server-controlled. Often automating sites the operator doesn’t own.
Linda: “I want an agent to assist the user on their browser.” → In-tab. User-controlled. Always on the operator’s own site (or in an extension).

Same primitive vocabulary, opposite use case.

Mental model

Stagehand:           [Your server] → [Headless browser] → [Their site]
                          ↑               ↓
                     "extract X"      "X is 42"

Linda:               [User] → [Their browser, your site] ← Linda agent
                          ↑                                ↓
                     "fill the form"                  fills the form

When you might compare them anyway

You could use Stagehand to test a Linda-powered form (“automate a fake user through this flow”). They compose nicely there.

You could use Linda to ship a feature where the user agrees to let the agent do something on the page they’re on — that’s Linda’s act primitive. It’s narrower than Stagehand because the user is in the loop.

The bigger picture

This category — “agentic browser primitives” — has three shapes:

Server automation. Stagehand, Browser Use, Puppeteer-MCP. Headless.
In-page assistant. Linda. User-in-loop.
OS-level automation. Computer Use, Claude Desktop with screen. The AI controls the user’s machine.

Pick by where the user is and who owns the action.

Compare on the dimensions

Dimension	Stagehand	Linda
Where it runs	Server (headless browser)	User’s browser
User involvement	None (automation)	User-in-the-loop
Primitives	act, extract, observe	act, extract, observe
Chat UI	No	Yes, Shadow DOM
Hosted	Browserbase	None
Browser infra	Yes (Playwright/Browserbase)	None (uses the user’s browser)
Multi-agent	Limited	Built-in
File parsing	Server-side	Browser-side (lazy)
License	MIT	MIT

FAQ

Can Linda do server-side automation?

No. Linda runs in the browser, in the user's session. For server-side automation (scraping, testing, scheduled jobs), use Stagehand or Browser Use.

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