Last updated: June 2026. Every claim on this page links to a published source: Anchor's documentation and benchmark methodology, or Browserbase's own pricing and documentation pages. Pricing and plan details reflect each company's published pages as of this date.

Anchor Browser and Browserbase both provide managed browser infrastructure for AI agents and automation: cloud-hosted Chromium sessions you create through an API instead of operating browser fleets yourself. Both publish SOC 2 Type II and HIPAA compliance. Both isolate each browser in its own virtual machine. For many workloads, either will run your automation.

The differences that decide real evaluations are structural, and they are documentable: how each platform handles authentication that has to survive across separate agent runs, measured page-load reliability, per-unit pricing, deployment options inside your own cloud, and the depth of the compliance envelope. This page lays out each one with sources, including the places where Browserbase is the stronger choice.

Where Browserbase is strong

An honest comparison starts here.

• Lower entry price for small workloads. Browserbase's Developer plan is $20/month and includes 100 browser hours and 1 GB of proxy data. A team running under 100 browser hours a month pays $20 flat. Anchor's Starter plan is $50/month.

• Stagehand. Browserbase maintains Stagehand, a widely adopted open-source framework for AI-driven browser automation. It has a large community and good documentation. Stagehand also runs on Anchor sessions (integration guide), so the framework choice is independent of the infrastructure choice.

• Contexts is a clean primitive. Browserbase Contexts persist cookies, localStorage, and IndexedDB across sessions, and the feature is well documented.

If your workload is small, stateless, and price-sensitive at the entry tier, Browserbase is a reasonable choice. The rest of this page covers the dimensions where the platforms diverge.

Measured page-load reliability

In August 2025, Anchor published a page-load reliability benchmark against the 100 highest-traffic websites in the US (per SimilarWeb). Both platforms ran standard Playwright Chromium sessions with no proxies and no stealth features, with a 30-second timeout; a load counted as successful when the page returned a valid HTTP response and a page title.

• Anchor Browser loaded 93 of the 100 sites.

• Browserbase loaded 71 of the 100.

The full methodology and the per-site failure analysis are in the post. Two caveats the benchmark itself states: some failed sites loaded fine through each vendor's interactive playground, which suggests programmatic session configuration rather than fundamental incompatibility as the cause of some failures, and both platforms fell short of perfect reliability. The benchmark was run on August 22, 2025; methodology is published so anyone can reproduce it.

For agent workloads this gap compounds. An agent that visits ten sites in one task multiplies per-page reliability into task-level reliability, so the per-page baseline is one of the highest-leverage numbers in the category.

Authentication that survives across agent runs

This is the largest architectural difference between the two platforms.

Browserbase persists browser state. A Context saves cookies and client-side storage from a session and restores them in the next one. Browserbase's own documentation describes the boundary: websites expire authentication cookies, invalidate sessions after password changes, and perform server-side logouts, and it recommends you "implement checks in your automation to detect logged-out states and re-authenticate when necessary." Re-authentication logic is yours to build.

Anchor persists browser state and manages re-authentication. Anchor has the state-persistence primitive too: Profiles store cookies, local storage, and cache from a session and outlive it. On top of that sits OmniConnect, Anchor's identity layer: you store credentials once on an identity, attach the identity when creating a session, and the browser starts signed in. When the saved state expires, Anchor re-authenticates automatically, which is precisely the case Browserbase's documentation hands back to your code.

The identity layer extends through the rest of the authentication stack:

• Multi-factor authentication. Identities handle TOTP-style authenticator flows (credential types), and email-based one-time passcodes work through a dedicated mailbox per identity: forward the login emails, and the OTP is consumed automatically during identity creation, re-authentication, and live agent sessions. For codes that have to come from an external system mid-run, event coordination lets your backend inject them without stopping the task.

• Credentials stay out of the model. Secret values pass credentials to an agent as references that resolve only at typing time; real values are never visible to the AI model, are processed in memory, are excluded from logs and telemetry, and can be scoped to specific domains.

• 1Password integration. Secrets, including TOTP codes, resolve directly from 1Password vaults at session creation, so credentials live in your vault rather than in your codebase.

• End-user sign-in for SaaS builders. If your product's users need to connect their own accounts, OmniConnect's hosted flow lets them sign in on Anchor's UI and hands your app back an identity ID, so your application never touches their credentials.

Anchor's security documentation also states that customers are never required to store credentials on the platform; session-based authentication is available when you want credentials to exist only at runtime.

Pricing: published per-unit rates

Both companies publish usage-based pricing. The per-unit rates, from each pricing page on the date above:

Metered unit	Anchor Browser (source)	Browserbase (source)
Browser usage	$0.05 per browser-hour	$0.12/hr after included hours (Developer), $0.10/hr (Startup)
Browser creation	$0.01 per browser	Included
Proxy data	$8 per GB	$12/GB after included GB (Developer), $10/GB (Startup)
AI steps	$0.01 per step	Not a listed metered unit

Worked example at sustained volume, metered usage only: 1,000 browser-hours across 2,000 sessions in a month.

• Anchor: 1,000 hours × $0.05 + 2,000 creations × $0.01 = $70 in metered usage, on top of the plan fee (Starter $50/month, up to 25 concurrent browsers).

• Browserbase Developer ($20/month): 100 included hours, then 900 × $0.12 = $108, for $128 total at 25 concurrent.

• Browserbase Startup ($99/month): 500 included hours, then 500 × $0.10 = $50, for $149 total at 100 concurrent.

Below roughly 100 browser-hours a month, Browserbase's included allotment makes it the cheaper bill. As volume grows, Anchor's lower per-hour rate dominates, and proxy-heavy workloads widen the gap ($8/GB against $10–12/GB). Plan tiers also gate different ceilings: Anchor's published concurrency runs 5 (Free), 25 (Starter), 200 (Growth, $2,000/month), 500+ (Enterprise); Browserbase's runs 3, 25, 100, 250+ (Scale).

Deployment: managed cloud, EU residency, or your own cloud

Anchor's managed service processes and stores customer data in AWS us-east-2 (Ohio), with dedicated European data residency in AWS eu-central-1 (Frankfurt) available on the Growth plan. For teams whose security model requires the browsers themselves to run inside their own boundary, Anchor's Enterprise tier offers bring-your-own-cloud and on-premise deployment, and Anchor is available through the AWS Marketplace. Browserbase's published plans describe its managed cloud.

This matters most in regulated evaluations: when the question shifts from "is the vendor compliant?" to "can the browser fleet run where our data already lives?", deployment options inside your own VPC become the deciding line.

Security and compliance

Both platforms publish real security postures, and both isolate each browser session in a dedicated virtual machine.

	Anchor Browser (trust page)	Browserbase (enterprise security docs)
SOC 2 Type II	Yes	Yes
HIPAA	Yes	Yes
ISO 27001	Yes	Absent from published docs
GDPR posture	Yes, with EU data residency option (Growth)	Absent from published docs
BAA / DPA	Enterprise tier	Scale tier
Per-session VM isolation, destroyed after session	Yes	Yes
Zero data retention mode	ZDR mode: disables all video and log recording	Absent from published docs
Sensitive data handling	Automatic masking of passwords and emails; secret values never reach the model	Documented credential encryption
Deployment beyond managed cloud	BYOC / on-premise (Enterprise)	Absent from published plans

"Absent from published docs" means exactly that: the claim does not appear on the company's public pages as of the date above, and procurement teams should confirm directly. Anchor's compliance certifications apply on Growth and Enterprise tiers.

Anchor's session data model is ephemeral by architecture: anything accessed, generated, or downloaded during a session either transfers directly to your environment over a peer-to-peer channel or is irretrievably deleted with the virtual machine when the session ends (security docs).

Debugging and production observability

Both platforms offer session visibility. Anchor sessions record to MP4 by default, stream a live view you can embed in your own product (interactive or read-only), and expose three structured log streams per session through the API: agent logs, browser-action logs, and network-response logs, plus page-state snapshots captured during executions. Recordings pause and resume through the API when a workflow crosses screens that should stay off video.

Side-by-side summary

Dimension	Anchor Browser	Browserbase
Page-load reliability, top 100 US sites (benchmark, Aug 2025)	93 of 100	71 of 100
Browser-hour rate	$0.05	$0.10–0.12 after included hours
Proxy rate	$8/GB	$10–12/GB after included GB
Entry plan	$50/mo (Starter, 25 concurrent)	$20/mo (Developer, 25 concurrent, 100 hrs included)
Auth state across runs	Profiles (state) + identities with automatic re-authentication	Contexts (state); re-auth checks are your code
MFA in automation	Managed identity layer: authenticator credentials, email OTP mailboxes, event-injected codes	TOTP generation and context-persisted MFA trust per their guides
Credential isolation from the model	Secret values with type-time injection; 1Password vault resolution	Absent from published docs
Captcha handling	Vision-based solving including Cloudflare challenges (paid plans)	Partner-based solving, on by default
Compliance published	SOC 2 Type II, ISO 27001, HIPAA, GDPR (Growth+)	SOC 2 Type II, HIPAA
EU data residency	Growth plan (Frankfurt)	Absent from published docs
BYOC / on-premise	Enterprise tier, AWS Marketplace	Absent from published plans
Open-source framework	Works with Stagehand, Playwright, Puppeteer, browser-use	Maintains Stagehand
SDKs	Node.js and Python	Node.js and Python

Which one fits your workload

Teams choose Browserbase for small or experimental workloads that fit inside the $20 entry plan, and for projects already built around the Stagehand ecosystem end to end.

Teams choose Anchor when the automation has to log in somewhere and stay logged in across runs, when sessions carry real credentials that must stay invisible to the model, when the bill is dominated by browser-hours or proxy data at sustained volume, when procurement requires ISO 27001 or GDPR posture or an EU region, and when the deployment has to land inside their own cloud.

Frequently asked questions

Is Anchor Browser a drop-in Browserbase alternative? For Playwright, Puppeteer, and Stagehand workloads, yes: Anchor exposes standard CDP-compatible browser sessions with Node.js and Python SDKs and integration guides for the common agent frameworks. Migration mostly means changing the session-creation call.

Does Anchor handle logins that require MFA? Yes. Identities support authenticator-style credentials, email OTP routes one-time codes through a dedicated per-identity mailbox, and event coordination injects codes from external systems mid-session.

Does the AI agent ever see stored passwords? No. Secret values resolve at typing time; real values are never visible to the model and are excluded from logs and telemetry. With the 1Password integration, values resolve from your vault at session creation.

Can Anchor run in our own cloud? Yes, bring-your-own-cloud and on-premise deployment are available on the Enterprise tier, alongside the managed US and EU regions.

Where do these numbers come from? Every number on this page links to its source: Anchor's pricing, security, and benchmark pages, and Browserbase's pricing and documentation. Published pages change; the date at the top is the verification date.