Browserbase is a developer-infrastructure company that operates managed headless browsers purpose-built for AI agents and web automation workloads. The platform makes the web behave like an API by giving agents reliable, observable browser sessions that can navigate dynamic JavaScript sites, handle authentication, bypass bot detection, and execute multi-step workflows at scale.
The product exposes a Browser-as-a-Service API along with Stagehand, an open-source SDK for AI-driven browser actions, and Director, a no-code tool that lets non-developers record and replay browser automations. The infrastructure handles browser pooling, session persistence, proxy rotation, captcha solving, and live debugging via inspectable session replays.
Browserbase was founded by Paul Klein IV, a former engineer at Twilio and Stripe, who launched the company in 2024 after seeing how brittle existing headless-browser stacks were when paired with autonomous AI agents. The company is headquartered in San Francisco.
In its first 15 months Browserbase raised approximately $67.5 million across seed, Series A, and Series B rounds. The Series B closed in June 2025 at $40 million, led by Notable Capital with participation from existing investors Kleiner Perkins and CRV, valuing the company at approximately $300 million.
Browserbase reports having served more than 50 million browser sessions and powering automation for over 1,000 companies, including Perplexity, Vercel, and Customer.io. Its main competitors include Browser Use, Browserless, Anchor Browser, and Hyperbrowser, but Browserbase differentiates through deep tooling for observability, replayable sessions, and enterprise-grade reliability.