Deck vs Playwright: Which One Should Run Your Automation in 2026?

Playwright and Deck show up in the same conversations for a simple reason: both end up controlling a browser to get something done on a web page a company doesn’t have an API for. Past that, they’re built for different jobs. Playwright is a free, open-source library for driving a browser from your own code. Deck is managed infrastructure for AI agents that need to authenticate into other systems — real logins, real MFA, real CAPTCHAs — and return reliable data at production scale.

Conflating the two leads to bad decisions in both directions: teams that adopt Deck for something Playwright already does for free, and teams that try to build Deck on top of Playwright themselves and rediscover, six months in, why authentication infrastructure is its own discipline. This piece is an honest, detailed comparison of both, including where Playwright is simply the better tool.

The Short Answer

Playwright is Microsoft’s open-source browser automation and testing framework. You write code (TypeScript, Python, Java, or .NET), it drives a real Chromium, Firefox, or WebKit browser, and you own everything — hosting, scaling, authentication logic, error handling. It’s free, extremely well-maintained, and the closest thing the industry has to a standard for browser-level testing and automation.

Deck is a hosted platform that gives AI agents authenticated, user-permissioned access to over 100,000 login-gated portals — with MFA handling, CAPTCHA resolution, encrypted credential storage, consent flows, structured output, and compliance logging built in as infrastructure, not something you assemble yourself.

If your job is testing your own web app, Playwright wins outright — it’s free, it’s purpose-built, and nothing beats it. If your job is getting an AI agent reliably logged into other systems (a vendor portal, a customer’s payroll provider, a government site) and extracting or submitting data at scale, Deck wins because Playwright hands you a browser and stops there — everything after “open a page” is work you’d have to build.

What Is Playwright?

Playwright is an open-source (Apache 2.0) browser automation framework created and maintained by Microsoft. It launched in 2020 as a successor to Puppeteer (built by several of the same engineers) and has become the default choice for end-to-end web testing, with tens of thousands of GitHub stars and adoption across most companies doing serious frontend QA.

Playwright’s core strengths:

• Cross-browser by default. A single API drives Chromium, Firefox, and WebKit — including mobile Safari and Chrome emulation — without separate drivers or vendor-specific quirks.
• Auto-waiting and web-first assertions. Playwright waits for elements to be actionable before interacting with them, which eliminates the flaky sleep() calls that plagued Selenium-era test suites.
• Resilient, user-centric locators. getByRole, getByLabel, and getByText locate elements the way a person or screen reader would, making tests less brittle to markup changes.
• First-class debugging tools. Trace Viewer replays a full timeline of DOM snapshots, network activity, and console logs for any run. The Playwright Inspector and codegen tool record real browser sessions into runnable code.
• Test isolation. Every test gets a fresh, isolated browser context by default, which removes an entire category of test pollution bugs.
• Multi-language support. Official bindings for TypeScript/JavaScript, Python, Java, and .NET, so teams can write automation in the language their codebase already uses.
• An emerging role in AI agent tooling. Playwright now ships accessibility-snapshot features aimed at letting coding agents (Claude, GitHub Copilot, and others) drive a browser as a tool, and its engine underpins several third-party AI browser agent products.

What Playwright is not: a hosted service. There’s no Playwright cloud, no managed browser fleet, no credential vault, and no built-in handling for MFA, CAPTCHA, or antibot systems. You run it — in CI, on your own servers, or via a third-party cloud browser provider — and you write the logic for anything past “navigate and interact.” That’s the same distinction laid out in what Playwright and Selenium don’t do as production infrastructure.

What Is Deck?

Deck is an agent infrastructure platform that lets AI agents authenticate as real users and operate software — web portals, desktop applications, and legacy systems — without requiring an API. Where Playwright gives you a browser to drive, Deck gives you a completed authentication and operations layer built on top of that same category of browser automation:

• Native MFA and CAPTCHA handling. SMS codes, authenticator app tokens, email OTPs, and CAPTCHA challenges are resolved as part of the platform, not custom code you maintain.
• Encrypted, scoped credential vault. Credentials are stored encrypted and scoped per agent session; they’re never returned to your backend in plaintext.
• 100,000+ pre-built portal connections. Payroll systems, ERPs, insurance carriers, government sites, and other no-API systems are already mapped, so a new integration is a prompt, not a project.
• Deterministic, structured output. Every task returns schema-validated JSON, regardless of how inconsistent the underlying interface is.
• Workflow orchestration. Scheduling, retries, chaining, and streaming results to webhooks or queues are native, not something bolted on.
• Session observability. Live monitoring and full session replay (screenshots, reasoning traces, logs) for every run.
• Compliance built in. SOC 2 Type II certification, HIPAA readiness, and GDPR-compliant consent and audit logging, which matters the moment “automation” becomes “accessing a person’s data with their permission.”

Deck doesn’t try to replace Playwright as a testing tool — it solves an adjacent, harder problem: production-grade, authenticated access to systems you don’t control and can’t get an API for.

Quick Comparison

They’re Not Actually Competing for the Same Job

This is the point most comparisons skip. Playwright answers the question: “How do I reliably control a browser I’m testing or automating?” Deck answers a different question: “How do I get an AI agent authenticated into someone else’s system, with their permission, and get clean data out at scale?”

A QA engineer writing regression tests for their company’s checkout flow doesn’t need a credential vault, MFA handling, or SOC 2 audit logging — they need Playwright, and Playwright is excellent at that job, for free. An engineering team building an agent that logs into hundreds of customers’ payroll providers to pull payroll data doesn’t need a test runner or a describe() block — they need infrastructure that handles authentication, consent, and structured output as a matter of course, which is what Deck is built for.

Where the two genuinely overlap is browser-level automation of third-party sites without an API. That’s the scenario worth digging into.

Where Playwright Wins

Being objective means naming this clearly: for a meaningful set of use cases, Playwright is the right answer and Deck would be overkill.

• It’s free. No usage-based billing, no vendor dependency. For teams with the engineering time to build what they need, Playwright’s total cost is engineering hours, not a recurring platform fee.
• It’s the best tool for testing your own product. Nothing in this comparison changes that. If the job is E2E or regression testing of an application your team owns, Playwright — paired with @playwright/test — is purpose-built and hard to beat.
• Full control, no vendor lock-in. You own the code, the infrastructure, and the roadmap. Nothing changes underneath you unless you change it.
• Best-in-class debugging. Trace Viewer’s ability to scrub through a failed run — DOM state, network calls, console logs, all timestamped — is genuinely excellent and something few managed platforms match at the same granularity.
• Multi-language, multi-browser by design. If your team already writes Python or Java and needs Firefox/WebKit coverage alongside Chromium, Playwright handles that natively.
• A massive, active ecosystem. Microsoft’s backing, frequent releases, deep documentation, and a large community mean answers to almost any implementation question already exist.
• It’s becoming an agent-tooling standard, too. Playwright’s accessibility-snapshot support for AI coding agents means it isn’t standing still on the automation side either — it’s a credible foundation layer, which is exactly why several browser-agent vendors (including forks like Skyvern’s Rustwright) build on top of it rather than around it.

If your problem is “test our app” or “automate a handful of sites we’re comfortable maintaining code against,” stop reading comparisons and use Playwright.

Where Deck Wins

The gap opens up the moment “automate a browser” becomes “authenticate into other people’s systems, reliably, at scale, with compliance requirements attached.”

Authentication is the hard part, and Playwright doesn’t touch it. Playwright can save a logged-in session’s storage state and reuse it — that’s the extent of its authentication support. Actually performing a login against a real-world portal — handling an SMS code, an authenticator app prompt, a CAPTCHA, a step-up verification triggered by a new IP — is entirely custom code you write and then maintain as every target site changes its login flow. Deck resolves this as infrastructure across 100,000+ portals already.

Credential handling becomes a security project, not a line of code. Storing and injecting credentials securely, rotating them, and never exposing them to application logs is a real engineering and security undertaking once you’re doing it for more than a couple of systems. Deck’s encrypted, scoped credential vault means engineers never handle raw credentials at all.

Structured output isn’t free. Playwright gives you the DOM. Turning that into schema-validated, deterministic JSON your downstream systems can trust — across sites that change their markup without notice — is work you own indefinitely. Deck guarantees the output schema regardless of what the underlying interface looks like.

Compliance is not optional once real users’ data is involved. If agents are accessing systems on behalf of users — payroll, benefits, insurance, healthcare — you need consent flows, encrypted storage, and auditable access logs, or you’re carrying real regulatory risk. Playwright, as a library, has no opinion on any of this; it’s entirely on you. Deck ships SOC 2 Type II certification, HIPAA readiness, and GDPR-compliant consent and audit logging as part of the platform.

Maintenance is continuous, and someone has to own it. Every portal you automate changes its UI eventually — a new MFA prompt, a redesigned login page, a new antibot check. With Playwright, your team owns detecting and fixing every break, across every site, indefinitely. With Deck, that maintenance burden sits with the vendor whose entire business is keeping 100,000+ connections working.

Scale changes the math. Running one script against one site is trivial in either tool. Running reliable, authenticated automation against hundreds of distinct portals — each with its own login quirks, MFA setup, and antibot posture — is where hand-rolled Playwright scripts become an ongoing engineering team’s full-time job, and where Deck’s pre-built connection library and managed infrastructure pay for themselves.

The Build-vs-Buy Math

If you decided to build Deck’s capabilities on top of Playwright yourself, here’s roughly what’s on the list:

• A secure, encrypted credential storage system with per-session scoping
• MFA interception and resolution logic (SMS, TOTP, email OTP) — and a way to keep it working as sites change their flows
• CAPTCHA-solving integration and fallback handling
• User consent and permission flows, plus the data-processing agreements they imply
• Session management, token refresh, and expiry handling per target system
• A schema-validation layer to turn scraped DOM state into structured, deterministic output
• Workflow orchestration: scheduling, retries, chaining, and delivery to downstream systems
• Compliance-grade audit logging, and the SOC 2 / HIPAA / GDPR work to back it
• Ongoing maintenance as every one of your target portals changes over time

None of this is exotic — it’s normal, well-understood engineering. But it’s also, in aggregate, a second product: an internal version of Deck, built for one company, without the benefit of a connection library already hardened across 100,000+ real portals. Teams that go this route on top of Playwright are not avoiding the work Deck does — they’re doing it themselves, from scratch, on an ongoing basis.

Can You Use Both?

Yes, and plenty of teams do — they’re not mutually exclusive. A common pattern: Playwright for testing your own product’s UI in CI, and Deck for agents that need authenticated access into third-party systems your team doesn’t control. Deck’s own infrastructure operates in the same category of browser automation Playwright pioneered; the difference is everything Deck adds on top for the authentication, compliance, and scale problem specifically.

If you’re evaluating a cloud browser provider that sits between raw Playwright and a full platform like Deck — for example, a service that gives you managed Playwright-compatible browser sessions without the authentication layer — that’s a different, narrower comparison. See our breakdown of Deck vs. Browserbase for that layer of the stack.

Decision Framework

Choose Playwright if:

• You’re testing an application your own team owns and controls
• You want zero recurring cost and are comfortable maintaining automation code
• You need fine-grained control over browser behavior, or multi-language/multi-browser coverage
• Your use case doesn’t involve authenticating into other companies’ or users’ accounts at scale
• You have (or want to build) in-house expertise in browser automation maintenance

Choose Deck if:

• Your agents need to log into systems you don’t control — vendor portals, customer accounts, legacy software — with real MFA and CAPTCHA in the way
• You’re operating at a scale where hand-maintaining login flows for dozens or hundreds of sites isn’t a good use of engineering time
• Consent, encrypted credential storage, and audit logging are requirements, not nice-to-haves
• You need guaranteed structured output your downstream systems can trust, not raw DOM to parse
• You want a new portal connection to take a prompt, not a sprint

Use both if:

• You need Playwright for internal QA and Deck for external, authenticated agent access — the two problems coexist in plenty of engineering orgs without conflict.

Frequently Asked Questions

What is the difference between Deck and Playwright?

Playwright is a free, open-source library for driving a browser from your own code — the standard tool for testing web applications. Deck is a managed platform that gives AI agents authenticated, user-permissioned access to 100,000+ login-gated portals, with native MFA and CAPTCHA handling, encrypted credential storage, structured output, and compliance logging built in.

Can Playwright handle MFA and CAPTCHA?

Not natively. Playwright can save and reuse an already-authenticated session’s storage state, but resolving MFA challenges (SMS, authenticator app, email OTP) or CAPTCHA at login time requires custom code you write, integrate with a third-party solver, and maintain as target sites change. Deck handles both natively as part of the platform.

Is Deck built on top of Playwright?

Deck’s infrastructure operates in the same category of browser automation that Playwright helped popularize, but the comparison that matters isn’t the underlying engine — it’s the layer of authentication, credential management, compliance, and orchestration Deck provides on top, none of which Playwright itself offers.

Is Playwright free, and how does that compare to Deck’s pricing?

Playwright is free and open source under the Apache 2.0 license — there’s no licensing cost, only your own hosting and engineering time. Deck is a paid, usage-based platform. The right comparison isn’t Playwright’s $0 license fee against Deck’s price — it’s Deck’s price against the fully loaded cost of building and maintaining Deck’s capabilities yourself on top of Playwright.

Should I replace my Playwright test suite with Deck?

No. If Playwright is testing your own application, keep it — it’s the right tool for that job and switching would be a downgrade. Deck is not a testing framework; it’s authentication infrastructure for agents accessing systems you don’t own. The two solve different problems and most engineering orgs that use Deck keep Playwright for what it’s already good at.

Does Deck replace the need for engineers who know Playwright?

No, but it removes the need to build and maintain authentication, compliance, and orchestration logic on top of a Playwright-style browser engine. Engineering time that would have gone into login flows, MFA handling, and DOM parsing goes toward the actual product instead.

Conclusion

Playwright earned its place as the default browser automation and testing framework for good reason — it’s free, exceptionally well-built, cross-browser, and backed by an enormous community. Nothing here disputes that, and for testing your own application, it remains the right choice, full stop.

Deck exists for a different, harder problem that Playwright was never built to solve: getting an AI agent authenticated into other people’s systems — real logins, real MFA, real CAPTCHAs, real compliance requirements — reliably, at scale, without your team rebuilding that infrastructure from scratch. For that specific job, Deck wins because the alternative isn’t “use Playwright instead” — it’s “build Deck yourself, on top of Playwright, and maintain it forever.” For teams facing that problem, Deck is the faster, safer, and ultimately cheaper path.

Related reading

• Playwright and Selenium Are Frameworks. Here’s What They Don’t Do.
• How Does Browserbase Compare to Deck for Automating the Browser?
• What Does Browser Automation at Scale Actually Require?
• Is Headless Browser Infrastructure Enough to Automate Login-Gated Systems?