Browserbase provides managed browser sessions, Stagehand, search and fetch, proxies, identity, recordings, and serverless agent execution, but website policy, reliability, security, and layered usage costs stay with the builder.
Direct verdict
Browserbase earns a shortlist for teams that want to buy managed browser infrastructure rather than operate it. Pilot only on sites and actions you are authorized to automate, preserve deterministic controls for critical steps, add explicit approval before purchases or submissions, and calculate cost per successful workflow—not cost per browser minute.
What to verify
Run 500 approved workflows across target sites using both deterministic Playwright and Stagehand where appropriate. Include logins, 2FA handoffs, dynamic pages, downloads, uploads, region changes, slow networks, retries, site redesigns, and human approval before consequential actions. Measure success without intervention, p95 duration, CAPTCHA and block rate, recording completeness, credential isolation, recovery, model calls, browser minutes, proxy GB, and all-in cost per successful task.