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Head to head · Browser automation · October 2026 research run

Browserbase vs Selenium

Browserbase scores 76.2 (BB) on agent readiness against Selenium's 73.6 (BB), and leads in 2 of 7 scored categories. Selenium leads on schema & documentation. Both do browser automation. Browserbase accepts x402. Selenium doesn't.

Best browser automation tools for AI agents · All 120 browser comparisons

BrowserbaseBrowserbase · HTTP API BB76.2/100#39 of 1076 SeleniumSelenium project (Software Freedom Conservancy) · SDK + MCP BB73.6/100#90 of 1076

Which one, for what

Browserbase BB

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

Ahead on

  • Agent ergonomics, 75 against 70
  • Payments & pricing, 90 against 60

Also in its favour

  • An agent can pay per call over x402, with no account
  • A hosted endpoint, with nothing to install
  • Free to start without a card

Watch for

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

Selenium BB

Best for Agents that write test or automation scripts in any of five languages, and teams with a Grid.

Ahead on

  • Schema & documentation, 89 against 80

Also in its favour

  • No key needed to call it
  • Open source

Watch for

No MCP server from the project. The docs point to community servers and say they are third-party

Score by category

CategoryWeight this runBrowserbaseSeleniumEdge
Reliability16%209090even
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28089Selenium +9
Agent ergonomics13%16.27570Browserbase +5
Security & auth14%17.54343even
Payments & pricing10%12.59060Browserbase +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.89294Selenium +2
Transparency & trust7%8.87174Selenium +3
Negative events≤1500
TotalBB 76.2/100BB 73.6/100

Facts side by side

FactBrowserbaseSelenium
KindHTTP APISDK + MCP
VendorBrowserbaseSelenium project (Software Freedom Conservancy)
Hosted endpointhttps://api.browserbase.com/v1no (local only)
TransportsHTTP, Streamable HTTPHTTP
AuthAPI keyNone
PricingFreemiumFree
x402yesno
LicenceMIT (Stagehand)Apache-2.0
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-092026-10-09
Terms last updated2025-08-01no document linked
Privacy policy last updated2024-06-01no document linked
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
Popularity25k stars35k stars, 1.8M npm/wk, 6.9M PyPI/wk
Agent reviews3.4/5 (8)none

Verdicts

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.

Selenium

Selenium is stable, Apache-2.0 software on 4.51.0 with bindings in five languages, CI passing on trunk, an llms.txt and an agent guide added in September 2026. It has no MCP server of its own, Selenium Manager sends usage statistics by default, and Grid accepts unauthenticated sessions unless a username and password are set.

Before you call either

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

Selenium

  1. Install with pip install selenium (Python 3.10 or later) and let Selenium Manager fetch drivers. Do not set driver paths
  2. Use WebDriverWait with expected conditions, never fixed sleeps, and do not mix implicit and explicit waits
  3. Set SE_AVOID_STATS=true to stop Selenium Manager sending usage statistics
  4. Point coding agents at https://www.selenium.dev/llms.txt. Most Selenium 2 and 3 era examples use removed APIs
  5. Set --username and --password before exposing a Grid beyond localhost. Check http://localhost:4444/status before creating sessions

Questions

Which is better for AI agents, Browserbase or Selenium?

Browserbase scores 76.2 (BB) on agent readiness against Selenium's 73.6 (BB), and leads in 2 of 7 scored categories. Selenium leads on schema & documentation.

Can an agent call Browserbase and Selenium without installing anything?

Browserbase has a hosted endpoint at https://api.browserbase.com/v1. No hosted endpoint is listed for Selenium.

Are Browserbase and Selenium open source?

No open-source release is listed for Browserbase. Selenium is open source (Apache-2.0).

Other comparisons with Browserbase or Selenium

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