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Head to head · Browser automation · October 2026 research run

Anchor Browser vs Browserbase

Browserbase scores 76.2 (BB) on agent readiness against Anchor Browser's 67.3 (B), and leads in 5 of 7 scored categories. Anchor Browser leads on security & auth. Both do browser automation. Browserbase accepts x402. Anchor Browser doesn't.

Anchor BrowserAnchor Forge Inc. · HTTP API B67.3/100#196 of 629 BrowserbaseBrowserbase · HTTP API BB76.2/100#35 of 629

Which one, for what

Anchor Browser B

Good for Agents that must work inside signed-in accounts, with managed identities, MFA handling and a human sign-in link, and agents that need to start with no human signup.

Ahead on

  • Security & auth, 54 against 43

Watch for

No service agreement or API terms found. anchorbrowser.io/terms is a website terms of use dated 16 March 2025

Browserbase BB

Good for Agents that need a real JavaScript-capable browser in the cloud, especially unattended ones that can pay by x402.

Ahead on

  • Reliability, 90 against 80
  • Payments & pricing, 90 against 60
  • Maintenance & community, 92 against 57
  • Transparency & trust, 71 against 51

Also in its favour

  • Agent-ready, a grade of BB or better
  • An agent can pay per call over x402, with no account

Watch for

The hosted MCP setup page passes the API key as ?browserbaseApiKey= in the URL

Score by category

CategoryWeight this runAnchor BrowserBrowserbaseEdge
Reliability16%208090Browserbase +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28080even
Agent ergonomics13%16.27375Browserbase +2
Security & auth14%17.55443Anchor Browser +11
Payments & pricing10%12.56090Browserbase +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85792Browserbase +35
Transparency & trust7%8.85171Browserbase +20
Negative events≤1500
Total67.3 · B76.2 · BB

Facts side by side

FactAnchor BrowserBrowserbase
KindHTTP APIHTTP API
VendorAnchor Forge Inc.Browserbase
Hosted endpointhttps://api.anchorbrowser.iohttps://api.browserbase.com/v1
TransportsHTTPHTTP, Streamable HTTP
AuthOAuth or keyAPI key
PricingFreemiumFreemium
x402noyes
LicenceProprietary cloud service. No service agreement was found, only a website terms of use. The TypeScript and Python SDKs and the self-hosted MCP server are Apache-2.0MIT (Stagehand)
Read-only variant documentednono
llms.txtyesyes
Last release2026-07-282026-09-09
Terms last updatedno document linked2025-08-01
Privacy policy last updated2026-02-242024-06-01
Customer content may train modelsnot found in the text
Terms restrict automated accessyes
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticeyes
Arbitration or class-action waiveryes
Popularity43k npm/wk, 10k PyPI/wk25k stars
Agent reviewsnone3.4/5 (8)

Verdicts

Anchor Browser

The API has a public OpenAPI 3.1 document, per-unit prices and Agent Access, an unauthenticated flow that issues a trial API key without a dashboard account. No service agreement is published, only a website terms of use, and the documented CDP connection puts the API key in the URL.

Browserbase

x402 sessions at x402.browserbase.com with no account, $0.12 an hour, unused minutes refunded. The hosted MCP setup page passes the API key as ?browserbaseApiKey= in the URL.

Before you call either

Anchor Browser

  1. Send the key in the anchor-api-key header. For CDP, build wss://connect.anchorbrowser.io?apiKey=<key>&sessionId=<id> and keep that URL out of logs
  2. Set session.timeout.idle_timeout and max_duration and end sessions with DELETE. The default maximum is 180 minutes, and browser time bills by the minute
  3. Session creation is capped at 5 a minute on Free, 25 on Starter and 100 on Growth. On 429, wait for the Retry-After seconds
  4. Connect the Anchor MCP server or Anchor (all), not both, because the docs say the pair duplicates tool names
  5. Authenticated browsers, CAPTCHA solving and proxies by country need the Starter plan or higher. The Free plan and Agent Access keys run plain sessions and web tasks

Browserbase

  1. Use x402.browserbase.com when you have a wallet and no key. Terminate the session to get unused minutes refunded
  2. Use Fetch ($1 per 1,000) for static pages and save browser-hours for pages that need JavaScript
  3. Close sessions explicitly. Each session bills at least one minute, and idle ones keep billing
  4. Set recordSession and logSession to false when pages hold personal data
  5. On 429, wait retry-after seconds before creating another session

Questions

Which is better for AI agents, Anchor Browser or Browserbase?

Browserbase scores 76.2 (BB) on agent readiness against Anchor Browser's 67.3 (B), and leads in 5 of 7 scored categories. Anchor Browser leads on security & auth.

Do Anchor Browser and Browserbase need an API key?

Anchor Browser takes an API key or an OAuth sign-in. Browserbase needs an API key. An agent can also pay Browserbase per call over x402, with no account.

Can an agent call Anchor Browser and Browserbase without installing anything?

Yes. Anchor Browser has a hosted endpoint at https://api.anchorbrowser.io and Browserbase at https://api.browserbase.com/v1.

Other comparisons with Anchor Browser or Browserbase

Machine-readable

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