Steel Browser
FreemiumOpen-source browser API for AI agents managing cloud browser fleets.
By Tanmay Verma, Founder · Last verified 06 Jul 2026
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Added 7d ago
77/100Safe BetIn short
Steel Browser — Open-source browser API for AI agents managing cloud browser fleets. Best for AI agent developers needing cloud browser sandboxes for autonomous web tasks, Teams running large-scale web scraping pipelines with session persistence, RPA engineers automating web-based workflows with CAPTCHA handling. Free to start; paid plans from $0.4/mo.
Is Steel Browser actually worth it?
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Editorial Verdict
Best for
AI agent developers needing cloud browser sandboxes for autonomous web tasksTeams running large-scale web scraping pipelines with session persistenceRPA engineers automating web-based workflows with CAPTCHA handlingQA engineers testing web applications across multiple browser sessionsFoundational model trainers collecting web data without detection
Not ideal for
Users who need a consumer web browser for personal browsing (Steel is automation-only)Teams wanting a fully no-code browser automation tool (requires coding)Projects that require local-only browser control without cloud dependencySimple web scraping that can be done with static HTML (using Steel is overkill)
Steel delivers on its promise of simple cloud browser management with a generous free tier and strong open-source ethos. Its built-in CAPTCHA solving, Stealth Browser fork, and new Rust/Go SDKs give it a clear edge over Browserbase for production agent workloads. The metered Scale plan is fair, but heavy users should budget for dedicated IPs.
Skip Steel Browser if Skip Steel if you need a no-code browser automation tool or your project can be done with static HTML scraping — Steel requires coding and its metered pricing adds up at scale.
Compare with: Steel Browser vs Persana AI, Steel Browser vs CoreWeave, Steel Browser vs Skild AI
Last verified: July 2026
Viability Score
77/100
Safe BetHow likely is Steel Browser to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
momentum
55
funding runway
80
website health
90
wrapper dependency
100
Last calculated: July 2026
How we score →Key Features
- On-demand browser sessions via REST API
- Supports Puppeteer, Playwright, Selenium over WebSocket
- Built-in CAPTCHA solving (auto-upsolve)
- Persistent browser profiles (cookies, extensions, credentials)
- File upload/download within sessions
- Chrome extensions support
- One-shot scraping endpoint (HTML, Markdown, screenshot)
- Stealth Browser custom Chromium fork for agent workloads
- Dedicated IPs for stable network origin
- Projects for org-level isolation
- Native SDKs: Node.js, Python, Rust, Go
- CLI for quick scraping (steel scrape)
- Session Viewer for live and recorded session debugging
- Auto sign-in for auth-walled websites
- Atlas open-source deep research harness
About Steel Browser
FreemiumIntermediateAPI availableAPI · CLI · Web
Steel is an open-source browser API that gives AI agents and developers programmable access to cloud-hosted browsers. It abstracts away the complexity of provisioning browser instances, allowing you to spin up sandboxed sessions with a single API call and control them via Puppeteer, Playwright, or Selenium. Built for large-scale web scraping, autonomous agents, training data collection, and RPA, Steel handles CAPTCHA solving, session management, and browser fingerprinting so you can focus on automation logic. Features include persistent browser profiles (cookies, extensions, credentials), dedicated IPs for stable network origin, and a Session Viewer for live/debug observability. Steel also offers native SDKs for Node.js, Python, Rust, and Go, plus a CLI quick-scrape tool. With Launch Week v3, Steel introduced the Stealth Browser custom Chromium fork, Atlas deep research harness, and new pricing plans. While alternatives like Browserbase offer similar cloud browser capabilities, Steel's open-source model, generous free tier, and built-in CAPTCHA solving make it particularly appealing for teams wanting full control and cost predictability.
Behind the Verdict
Steel stands out in the crowded browser automation space by being fully open-source and offering a transparent pricing model. The free Launch tier gives you two concurrent sessions and 5 hours of browser time per month, which is generous for prototyping and small-scale jobs. The Scale tier's pay-per-hour model ($0.40/hr) is straightforward, though dedicated IPs cost extra. Steel's API-first design means you integrate it into your codebase with minimal friction — just change one line to run Puppeteer in the cloud. The Session Viewer is a strong differentiator for debugging agent workflows. However, the free tier's 5-hour cap may feel limiting for continuous scraping, and the metered pricing can surprise teams with unpredictable usage. For teams already using Puppeteer/Playwright, Steel is a drop-in replacement. For those starting from scratch, Browserbase offers a more polished UI but is proprietary. Steel's open-source nature gives you the option to self-host, which large enterprises will appreciate.
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Real-world workflow fit
Concrete scenarios for the personas Steel Browser actually fits — and what changes day-one when you adopt it.
AI agent developer at a startup
Building a shopping assistant that compares prices across e-commerce sites, requires CAPTCHA bypass and persistent login sessions.
Outcome: Within a day, the developer integrates Steel's Python SDK, creates a persistent profile for the user's credentials, and the agent navigates sites, extracts prices, and books flights reliably without manual intervention.
Data engineer at a research lab
Needs to scrape 10,000 product pages from a retail site daily for pricing dataset, but the site triggers CAPTCHAs after 100 requests.
Outcome: Engineer sets up 10 concurrent Steel sessions with dedicated IPs, each with a unique browser fingerprint. Steel's auto CAPTCHA solving keeps scraping running 24/7, collecting full dataset within budget.
QA engineer at a SaaS company
Running end-to-end tests across Chrome and Firefox on a CI server, needs isolated, repeatable browser environments for each test run.
Outcome: Engineer integrates Steel's Puppeteer connection via WebSocket, each test spins up a clean session with pre-loaded extensions, runs assertions, and releases the session. Tests complete 30% faster than local Docker containers.
Use Cases
- Build an AI shopping assistant that browses e-commerce sites to compare prices and book products.
- Automate repetitive web form submissions and data entry with persistent login sessions.
- Scrape thousands of web pages concurrently for training datasets using the sessions API.
- Deploy a customer service agent that logs into portals and performs actions on behalf of users.
- Run end-to-end tests across multiple browser profiles and extensions in isolated sessions.
- Generate PDFs or screenshots of web pages at scale using the browser tools one-shot endpoints.
Models Under the Hood
Stealth Browser (custom Chromium fork)
as of 2026-07-06
Limitations
- The free Launch plan caps concurrent sessions to 2 and includes only 5 browser hours per month.
- Production agent workloads may require Dedicated IPs (paid add-on) to avoid blocked requests.
- The Stealth Browser fork is still new and may have compatibility differences with some Puppeteer or Playwright scripts.
- The metered Scale plan can become expensive at high volume ($0.40 per browser hour, plus add-ons).
as of 2026-07-06
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Annual total
Free
Over 12 months
Effective monthly
Free
Billed monthly
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Steel Browser tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Launch
$0/mo
Ideal for
Individual developer or small team prototyping browser automation or scraping with low volume (under 5 hours/month).
What this tier adds
Free entry point with 2 concurrent sessions and 5 browser hours per month; includes all core features and CAPTCHA solving.
Scale
$0.40/hr (metered browser rates)
Ideal for
Production teams needing flexible, meter-based usage for variable workloads — pay per browser hour with no monthly cap.
What this tier adds
Unlimited concurrent sessions and browser time at $0.40/hr; includes priority support and optional dedicated IPs add-on.
Enterprise
Contact sales
Ideal for
Large organizations requiring custom SLAs, dedicated infrastructure, or on-premise deployment for compliance or scale.
What this tier adds
Custom session limits, SLA guarantees, dedicated support, and option to self-host Steel on your own infrastructure.
Integrations
PlaywrightPuppeteerSeleniumStagehandBrowser UseOpenAI Agents SDKClaude Computer UseNode.jsPythonRustGo
Where the pricing makes sense
The company stage and team size where Steel Browser's pricing actually pencils out — and where peers do it cheaper.
Steel's free Launch tier is generous for prototyping, but Browserbase's free tier offers 100 hours/month vs. Steel's 5. At scale, Steel's $0.40/hr is competitive, but Browserbase charges $0.15/session (including 1 hour) with volume discounts. For teams that need open-source flexibility, Steel's pricing is fair; for pure cost efficiency at high volume, evaluate carefully.
Setup time & first value
How long it actually takes to get something useful out of Steel Browser — broken out by persona, not the marketing-page minute.
For a developer already familiar with Puppeteer/Playwright, get a session running in under 10 minutes (install SDK, create API key, connect). Full production pipeline with profiles and CAPTCHA solving may take a few hours. Non-coders will need to budget time for learning the API.
Switching to or from Steel Browser
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
Migrating in
- →From Browserbase: Replace browserbase.connect() with Steel's Puppeteer/Playwright WebSocket URL — most API calls map 1:1.
Migrating out
- ↗To Browserbase: Replace Steel API keys and session creation with Browserbase's SDK — similar session model.
Resources & Guides
- Documentationsteel.dev
Docs · Steel Browser
Full product docs from steel.dev
- Documentationsteel.dev
Cookbook · Steel Browser
Full product docs from steel.dev
- Documentationsteel.dev
Integrations · Steel Browser
Full product docs from steel.dev
- Resourcesteel.apidocumentation.com
Api Reference · Steel Browser
Helpful link from steel.apidocumentation.com
Frequently Asked Questions
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