Unchained drives. You navigate. · Reviewed July 18, 2026

Browserbase vs Unchained: cloud browser fleet or on-machine workspace?

Browserbase excels at managed cloud browser sessions, parallel workloads, persistent cloud contexts, and built-in observability. Unchained fits a different job: let a supported AI workflow navigate a Chrome context on your computer through a guided hosted control surface.

Open a guided local-browser trial

The guided path uses a dedicated Unchained Chrome workspace; developer-path profile controls vary.

Choose Browserbase for managed cloud infrastructure

Its documented model is API-created, isolated browser sessions with plan-dependent concurrency, cloud Contexts, and session inspection.

Choose Unchained for an on-machine browser workflow

Use a guided local Chrome workspace or a supported developer path when the job needs browser state on your computer and hosted direction.

Answer first

Is Unchained a Browserbase alternative?

For a narrow, user-controlled workflow, sometimes. For a managed browser fleet, no. Browserbase documents a cloud platform whose basic unit is an isolated browser session created through its API. Its platform supports concurrent sessions, reusable cloud Contexts, Live View, recordings, and replay.

Unchained connects a supported AI path to a Chrome workspace on the user's computer and adds guided hosted control. The guided trial opens a dedicated workspace; supported MCP and CLI paths can expose different profile and interaction controls. If your product needs cloud fleet operations or recorded session inspection, Browserbase is likely the better fit.

Side by side

Different operating models

This is a fit comparison, not a benchmark. It makes no pricing, speed, reliability, security, or universal privacy claim.

Question	Browserbase	Unchained
Where Chrome runs	An isolated browser session runs in Browserbase's cloud infrastructure.	A local connector gives the supported workflow a Chrome context on the user's computer.
Session state	Sessions start fresh by default. An optional Browserbase Context can persist cookies, authentication, and application data across sessions.	The guided trial opens a dedicated on-machine Chrome workspace that can retain its sign-in state. Profile controls differ across supported developer paths.
Scale model	Browserbase documents parallel sessions plus plan-dependent concurrency and session-creation limits.	Unchained is positioned here for a selected on-machine workspace, not as a substitute for a managed parallel browser fleet.
Inspection	The Session Inspector includes Live View, video recordings, event timelines, and replay capabilities.	The hosted product guides and displays browser work; supported web, MCP, and CLI paths do not promise identical controls or Browserbase-style replay.
Starting point	Create and configure a cloud session through Browserbase's API, then connect an automation framework.	Start a guided local-browser trial, or use a supported MCP or CLI setup when that path fits.
Best fit	Teams building cloud browser infrastructure for parallel automation, testing, or agent workloads.	People who want a supported AI path to navigate an on-machine browser workspace without directing every browser step.

Browserbase is stronger when

You are operating browsers as cloud infrastructure

Your application needs API-created, isolated cloud browser sessions.
You expect parallel workloads and want documented concurrency controls.
You need built-in Live View, recordings, event inspection, or replay.
You want cloud Contexts to reuse authentication and application data between sessions.

Unchained fits when

You want the agent to drive an on-machine workspace

The task depends on a signed-in Chrome context on your computer.
You want to set the outcome and boundaries instead of scripting every click.
You prefer a guided hosted product surface, with supported MCP and CLI paths available.
You do not need Unchained to replace managed cloud concurrency or Browserbase observability.

Use the lightest lane

Need public research, not browser control?

Neither a cloud browser fleet nor a local connector should be the default for every question.

SearchAgentSky is the public-web research product

Use it for a current, cited answer from public sources with no local client. Use Unchained when the task needs a signed-in browser context or browser actions; use Browserbase when you are building managed cloud browser infrastructure.

Search public sources

Data flow

Compare the actual workflow, not a privacy slogan

Unchained is not local-only. Chrome workspace files remain on the user's computer, but commands, browser-derived page context, tool results, and related service data needed to run the workflow may be transmitted to Unchained and configured AI providers, and some service data may be stored. Review the current Unchained privacy policy before connecting sensitive work.

Browserbase sessions run in its cloud. Its documentation says session recording and logging are enabled by default and configurable, while Contexts persist browser data and are encrypted at rest. Review Browserbase's current settings and policies for your deployment. Neither architecture is inherently the right privacy choice for every workload.

Verify the claims

Current first-party sources

Browserbase can change its product and documentation. Check these official pages before deciding.

Browserbase: Create a browser sessionDefines an isolated cloud browser session, API creation, configuration, and default recording/logging settings.
Browserbase: ContextsDocuments fresh sessions by default and optional persistence of cookies, authentication, and application data.
Browserbase: ObservabilityDocuments Session Inspector, Live View, video recordings, event timelines, and replay.
Browserbase: Concurrency managementDocuments parallel sessions and plan-dependent browser and session-creation limits.
Unchained MCP guideCurrent setup and integration guidance for the supported MCP path.
Unchained privacy policyCurrent disclosures for browser-derived data, AI providers, service storage, and user choices.