Pick Playwright if you are starting something new and need more than one browser engine. Pick Puppeteer if you only ever target Chrome and want the smallest possible dependency. Pick Selenium if you need a language your team already writes, or you have an existing grid you are not going to rewrite this quarter.
That covers most decisions. The reasoning behind it matters more than the recommendation, though, because the moment your project stops looking like the average case you need to know which tradeoff you are actually making.
For head-to-head detail, we go deeper on Playwright vs Selenium and Playwright vs Puppeteer. Start here to choose, go there to compare.
The short version
| Dimension | Playwright | Puppeteer | Selenium |
|---|---|---|---|
| Protocol | CDP and native | CDP | WebDriver |
| Browsers | Five | Chrome-first, Firefox via BiDi | Most, via drivers |
| Language bindings | Four official, Go community | JavaScript first | Widest of the three |
| Auto-waiting | Built in | Mostly manual | Manual |
| Strongest at | Cross-browser testing | Chrome-only scraping | Existing grids, language reach |
The protocol difference explains most of the rest
Selenium talks to browsers through WebDriver, a W3C standard. Every command is an HTTP request to a driver process, which then instructs the browser. That indirection is what makes Selenium so portable: any vendor who implements the spec gets Selenium support for free, which is why it reaches browsers the other two cannot.
Playwright and Puppeteer connect over the Chrome DevTools Protocol instead, a persistent bidirectional connection to the browser itself. Fewer moving parts, lower latency per command, and access to browser internals that WebDriver never exposed, including network interception, precise request mocking, and CPU or network throttling.
The tradeoff is honest in both directions. CDP is faster and more capable on Chromium. WebDriver is a standard, and standards outlive individual tools. If you are automating a browser that is not Chromium-derived and not one of the engines Playwright bundles, WebDriver is often your only route.
Playwright hedges by speaking both. It uses CDP for Chromium and its own protocol for Firefox and WebKit, which is how one API covers engines that share nothing architecturally.
Browser coverage
Puppeteer is built around Chromium and Chrome. It gained official Firefox support in v23 through WebDriver BiDi, but Chrome is where it is mature and where nearly all of its usage sits, so treat it as a Chrome-first tool rather than a cross-browser one.
Playwright covers five browsers across three engines: Chromium, Chrome, Firefox, WebKit, and Edge. WebKit matters more than people expect, because it is the engine behind Safari, and Safari is where cross-browser bugs actually live for most consumer web apps.
Selenium's coverage depends on which drivers exist, which in practice means Chrome, Firefox, Edge, Safari, and historically Internet Explorer. It is the only one of the three that drives real Safari on macOS rather than the WebKit engine underneath it. If your acceptance criteria say Safari specifically, that distinction is the deciding factor.
Language support
This is where Selenium still wins outright, and it is the reason plenty of teams have not moved. Selenium has official bindings across a broad set of languages, so a Java shop or a Ruby shop can automate browsers in the language they already deploy and review.
Playwright supports JavaScript and TypeScript, Python, Java, and C# officially, plus Go through a community binding. Broad enough for most teams, and each binding tracks the same API closely.
Puppeteer is JavaScript and TypeScript first. Other languages exist through community ports, and they lag the main library. If your team does not write JavaScript, Puppeteer is a harder sell regardless of its technical merits.
Auto-waiting is the daily-life difference
Playwright waits for elements to be attached, visible, stable, and able to receive events before acting on them. You write page.click("#submit") and the waiting is implied.
Selenium expects you to manage that yourself with explicit waits. Teams that skip them get flaky suites, and a flaky suite quickly loses credibility with the people reading the test reports. Puppeteer sits between the two: some methods wait sensibly, others need an explicit waitForSelector.
Selenium can absolutely be made reliable. The question is how much boilerplate stands between you and a stable suite, and how much of your team's review time goes to waiting logic instead of to what you are actually asserting.
Running any of them at scale
The choice of library stops mattering as much once you move off a laptop, because the hard part becomes browser infrastructure rather than API ergonomics. Chrome leaks memory over long runs, concurrent sessions contend for CPU and shared memory, and someone has to patch browser versions on a schedule.
Browserless runs managed browsers you connect to over WebSocket, so your library keeps working and the infrastructure stops being yours to operate. One limit worth stating plainly: Puppeteer and Playwright connect to Browserless, but Selenium and WebDriver do not, because support for them was dropped in the version 2 rewrite. If you are on Selenium and want managed browsers, the realistic paths are migrating to Playwright or moving a Selenium Grid to BrowserQL.
For Playwright specifically, connectOverCDP is the recommended default and tolerates version drift between your client and the workers, while native connect is tightly version-coupled and required for Firefox, WebKit, and Edge. Puppeteer connects through CDP on the same endpoints. Check the version compatibility page for the library versions our workers accept before you pin a client, since a mismatch is a common cause of unexplained crashes.
So which one
Starting fresh and testing a web app that real users open in more than one browser: Playwright. The auto-waiting alone will save you weeks of flakiness triage, and WebKit coverage catches the Safari bugs you would otherwise ship.
Scraping or automating a Chrome-only target, in a JavaScript codebase: Puppeteer is a smaller dependency doing exactly one job well. Our own reasoning on that tradeoff is in why we pick Puppeteer over Selenium.
An existing Selenium suite that works: leave it alone. Rewrites are expensive and "the new tool is nicer" is not a business case. Migrate when you have a concrete reason, like needing WebKit coverage or being tired of maintaining grid infrastructure. If you are weighing that move, Selenium alternatives walks through the options including Cypress and WebdriverIO.
A language other than JavaScript, Python, Java, or C#: Selenium, and the decision is made for you.
Next steps
Head-to-head detail lives in the Playwright vs Selenium and Playwright vs Puppeteer comparisons linked up top. If you have picked a library and want to stop maintaining browsers, start with a free account and point your existing scripts at a connection URL.