Wield vs Browserbase: what each does and when to pick it

#What Browserbase is

According to its documentation, Browserbase gives agents hosted headless browsers, each in an isolated session. The same API key also covers search, fetch, functions and identity. Stagehand is Browserbase's SDK. It offers Playwright-level control together with AI primitives called act, extract and observe. For prices, see Browserbase pricing.

#Side-by-side

#Logins and your data

Browserbase's docs say its Agent Identity helps with anti-bot systems and login walls through partnerships. The same docs add that "each website still decides whether to allow access." Browserbase browsers run in a datacenter, so sites see a cloud client.

Wield does not read or copy cookies or passwords. A recipe sends its requests from a tab in your browser, under the session you already have. Results go from the extension to wield-mcp and then to your AI app, never through wield.run. When a site shows a check, such as a CAPTCHA or an "are you human" page, Wield stops with site_challenge and asks you to solve it in your own tab. Wield does not solve bot checks.

#Benchmark note

We did not benchmark Browserbase. The browser-agent side of our benchmark ran Browser Use on a fresh headless Chromium, not on Browserbase. In our runs, bot protection blocked that cloud browser on bahn.de, Lieferando, Zalando, ImmoScout24, Idealo, Eventim, mobile.de, Walmart, Zillow and OpenTable. Do not read those results as a measurement of Browserbase. The full method is on the benchmark page.

#When Browserbase is the better choice

• You need many sessions in parallel.
• Your runs are server-side and unattended.
• You automate arbitrary sites, not a fixed list.
• You want Playwright-level control in your own agent code.

#When Wield is the better choice

• You work with your own logins, and the credentials must stay on your device.
• You repeat a task on a supported site.
• You want structured results that your AI app calls as tools.
• You want no model cost per run.

#FAQ

#Is Browserbase a browser agent?

Not by itself. Browserbase is infrastructure for running browsers that agents control. You bring the agent, or you build one with Stagehand.

#Does Wield run in the cloud?

No. Recipes run in your browser through the Wield extension. wield-mcp runs locally and talks to your AI app over stdio, with no network port.

#Which one costs less?

For Wield, a run has no model cost, and the public registry and local runs are free. Browserbase pricing depends on the plan and usage. See its pricing page.