Playwright vs Selenium: Head-to-Head Comparison

Selenium, originally conceived in 2004, has been in continuous development for 18+ years. Its WebDriver interface became an official W3C Recommendation in 2018, and its ecosystem extends beyond the core framework tools like Appium and WebDriverIO, which are built directly on top of Selenium’s API. This long track record gives it unmatched community support and browser compatibility.

Playwright, first released by Microsoft in 2020, was built by the same team behind Puppeteer, a headless testing framework for Chrome/Chromium. Playwright extends Puppeteer’s approach by adding multi-browser support and cross-language compatibility, and is specifically engineered for the modern web with speed and reliability as core design goals.

Our focus will be on understanding the technical differences between these tools and examining how they operate under the hood. Rather than simply determining which tool is better, we aim to provide insights into their respective architectures, capabilities, and unique features. 

When it comes to web test automation, Selenium has long been the dominant tool in the industry. But Playwright, released by Microsoft in 2020, has been rapidly gaining ground. Both are open-source, cross-language, and developer-friendly, but they differ significantly in architecture, performance, and modern web capabilities. This comparison breaks down the key technical differences to help you choose the right tool for your project.

Playwright vs Selenium: Architecture Differences

We can see how the respective APIs interact with browsers and how communication happens.

Playwright	Selenium
Websocket- connection	HTTP- connection
Bi-directional	one – direction
Persistent	Request -> response

Playwright Architecture

Selenium Architecture

Browser Instantiation: Playwright vs Selenium

Playwright	Selenium
Playwright Core: With Playwright Core, we can directly import browser modules (i.e.chromium, firefox, etc) and we can create browser contexts, pages, and actions.	In Selenium, the WebDriver API uses browser-specific drivers (e.g., ChromeDriver for Chrome, GeckoDriver for Firefox). The WebDriver interacts with the browser driver through the HTTP protocol, launching and managing a browser instance. This process requires setting up and configuring the correct driver for the desired browser.
Use browser contexts to provide isolated sessions within the same browser instance.	Typically uses separate browser instances to achieve session isolation.
Faster and more resource-efficient when creating new sessions.	Slower and more resource-intensive when launching new sessions.
Simple and streamlined API for managing contexts.	More complex setup for managing multiple isolated sessions.
‘@playwright/test’: The second and easy approach is to use the ‘@playwright/test’ package. This package wraps the Laywright core. It provides a test runner and includes ‘tests and assertions’ out of the box.	‘TestNG’ is a testing framework for Java that provides functionalities similar to those of @playwright/test. This also supports fixtures[annotations], parallelisation, assertions, and test configurations. The thing is, the setup and integration is little bit complex when compared to Playwright.

Instantiating Playwright

Playwright offers two approaches to instantiation. The first uses playwright-core to directly import browser modules and manage contexts manually, giving you fine-grained control:

const { chromium } = require('playwright');

(async () => {
    // Launch a new browser instance
    const browser = await chromium.launch({ headless: false });

    // Create a new browser context
    const context = await browser.newContext();

    // Open a new page/tab
    const page = await context.newPage();

    await page.goto('https://www.example.com');
    await page.click('selector');
    await browser.close();
})();

The second, simpler approach uses the @playwright/test package, which wraps playwright-core and includes a built-in test runner, assertions, and fixtures out of the box, similar in purpose to TestNG in the Selenium ecosystem, but with a much simpler setup:

const { test, expect } = require('@playwright/test');

test.describe('My Test Suite', () => {
 
    test('Basic Navigation Test', async ({ page }) => {
               
              //here we can directly goto the url, sending the 'page' as an argument
               await page.goto('https://www.example.com');
               await expect(page).toHaveTitle('Example Domain');
               await page.click('selector');
               await page.fill('input#search', 'Playwright');

            });
});

Instantiating Selenium

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class SeleniumExample {
    public static void main(String[] args) {
        // Set the path to the browser driver
        System.setProperty("webdriver.chrome.driver", "/path/to/chromedriver");

        // Instantiate a WebDriver (ChromeDriver in this case)
        WebDriver driver = new ChromeDriver();
        driver.get("https://www.example.com");
        driver.findElement(By.id("element_id")).click();
        driver.quit();
    }
}

Handling Waits and Synchronization

Here, we can see how the tools ensure that the browser and page elements are in the expected state before performing further actions or assertions

	Playwright	Selenium
Automatic waits	Yes, Playwright automatically waits for elements to be ready before performing actions	No, requires explicit wait statements to handle readiness
Assertions with auto waiting	Built-in Playwright assertions automatically wait for the conditions to be met	Requires explicit waits or custom conditions to handle timing issues
Explicit waiting	Supports explicit waits using methods like waitForSelector, waitForEvent	Supports explicit waits using WebDriverWait and ExpectedConditions
Timeout configuration	Configurable at multiple levels (e.g., per action, per test, globally)	Configurable via setScriptTimeout, setPageLoadTimeout, and implicitlyWait

How Playwright Handles Waits

• In Playwright, automatic waits are built into the framework to help manage the synchronization of actions with the state of the webpage
• Playwright automatically waits for elements to be ready before performing actions like clicking, typing, or asserting
• Assertions with auto-waiting are a powerful feature that helps ensure your tests are robust and reliable. These assertions automatically retry until the expected condition is met or a timeout is reached

// Navigate to a page and wait for it to load
  await page.goto('http://example.com');
  // Wait for an element to be visible and click it
  await page.click('button#submit');

//assertion with auto wait
await expect(page.locator('h1')).toHaveText('Example Domain');

//explicit or manual wait
await page.waitForTimeout(3000); // Wait for 3 seconds

How Selenium Handles Waits

Implicit Wait

• Applies to all elements in the WebDriver instance. Once set, it will be used for the lifetime of the WebDriver object.

• It’s used to instruct the WebDriver to wait for a certain period when trying to locate an element before throwing a NoSuchElementException.

Explicit Wait

• Applies only to the specific element(s) and condition(s) for which it is set. It needs to be specified each time for each condition.  

• It’s used to wait for a specific condition to occur before proceeding further in the code execution. Commonly used conditions include element visibility, element clickability, and the presence of an element.

WebDriver driver = new ChromeDriver();
        
        // Implicit wait
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        
        driver.get("https://example.com");

//Explicit wait
        WebDriverWait wait = new WebDriverWait(driver, 10);
        WebElement element = wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("element_id")));

Browser Support: Playwright vs Selenium

Playwright	Selenium
Chromium, Firefox, WebKit	Chrome, Safari, Edge, Firefox, Internet Explorer, Opera
Supports mobile viewports	Supports mobile viewports
Supports headed and headless modes	Supports headed and headless mode
Not very suitable for cross-browser testing	Highly suitable for cross-browser testing

Playwright Browser Support

Playwright can run your tests in multiple browsers and configurations by setting up projects in the config.

import { defineConfig, devices } from '@playwright/test';

export default defineConfig({
  projects: [
    /* Test against desktop browsers */
    {
      name: 'chromium',
      use: { ...devices['Desktop Chrome'] },
    },
    {
      name: 'firefox',
      use: { ...devices['Desktop Firefox'] },
    },
    {
      name: 'webkit',
      use: { ...devices['Desktop Safari'] },
    },
    /* Test against mobile viewports. */
    {
      name: 'Mobile Chrome',
      use: { ...devices['Pixel 5'] },
    },
    {
name: 'Mobile Safari',
      use: { ...devices['iPhone 12'] },
    },
    /* Test against branded browsers. */
    {
      name: 'Google Chrome',
      use: { ...devices['Desktop Chrome'], channel: 'chrome' }, // or 'chrome-beta'
    },
    {
      name: 'Microsoft Edge',
      use: { ...devices['Desktop Edge'], channel: 'msedge' }, // or 'msedge-dev'
    },
  ],
});

Selenium Browser Support

Launching different browsers using the respective webDrivers.

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class ChromeTest {
    public static void main(String[] args) {
        // Set the path to the ChromeDriver executable
        System.setProperty("webdriver.chrome.driver", "/path/to/chromedriver");
        
        // Initialize the ChromeDriver
        WebDriver driver = new ChromeDriver();
        
        // Navigate to a website
        driver.get("https://www.example.com");
        
        // Perform actions
        // ...
        
        // Close the browser
        driver.quit();
    }
}

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class FirefoxTest {
    public static void main(String[] args) {
        // Set the path to the GeckoDriver executable
        System.setProperty("webdriver.gecko.driver", "/path/to/geckodriver");
        
        // Initialize the FirefoxDriver
        WebDriver driver = new FirefoxDriver();
        
        // Navigate to a website
        driver.get("https://www.example.com");
        
        // Perform actions
        // ...
        
        // Close the browser
        driver.quit();
    }
}

Parallelization Playwright vs Selenium

Playwright	Selenium
Automatic test sharding across workers	Manual configuration needed
Automatically balances load across workers	Requires custom setup in Grid

Playwright

• By default, Playwright runs test files in parallel
• To achieve even greater parallelization, you can further scale Playwright test execution by running tests on multiple machines simultaneously. We call this mode of operation “sharding.”

https://playwright.dev/docs/test-sharding#sharding-tests-between-multiple-machines

Selenium

In Selenium, test sharding is typically achieved through various strategies depending on the testing framework and setup you are using:

TestNG:

<suite name="Suite" parallel="methods" thread-count="4">
  <test name="Test">
    <classes>
      <class name="com.example.YourTestClass"/>
    </classes>
  </test>
</suite>

Selenium Grid:’

{
  "capabilities": [
    {
      "browserName": "chrome",
      "maxInstances": 5
    },
    {
      "browserName": "firefox",
      "maxInstances": 5
    }
  ],
  "maxSession": 10
}

Types of Testing Supported by Playwright and Selenium

Playwright	Selenium
Web UI testing	Web UI testing
API testing	Built-in not supported
Visual Regression	NA
Accessibility testing	NA
Load Testing- K6 integration	Load Testing- JMeter integration
Component Testing [Experimental phase]	Similar to JUnit, Mockito

Programming Language Support: Playwright vs Selenium

Playwright	Selenium
Javascript/Typescript	Java
Python	C#
C#	Python
Java	Ruby, Kotlin

Performance: Playwright vs Selenium

	Playwright	Selenium
startup time	Playwright is designed to be fast. It launches browsers in a headless mode by default, which reduces the startup time significantly.	Selenium tends to have a longer startup time, especially when using Selenium Grid to distribute tests across multiple machines
parallel Execution	Playwright supports parallel test execution out-of-the-box with minimal configuration, enabling faster test runs	Selenium supports parallel execution through frameworks like TestNG and JUnit, and through Selenium Grid. However, setting up and managing Selenium Grid can be complex and time-consuming
Flakiness	Less flaky	Moderately Flaky

Dependencies

	Playwright	Selenium
Browser libraries	Built-in (playwright install handles browser installation)	Separate downloads required (ChromeDriver, GeckoDriver, etc.)
Testing Framework	Playwright/test (built-in testing framework)	TestNG, PyTest, Appium
Shared/Cloud Environment	Microsoft Playwright Testing	Selenium Grid

Both Playwright and Selenium integrate seamlessly with popular CI/CD pipelines, including Jenkins, GitHub Actions, and Azure Pipelines, making either tool viable in modern DevOps workflows.

Community Support and Ecosystem

Playwright	Selenium
Upcoming tool, moderately available	Highly available, used by many people

Alternatives to Playwright and Selenium

Selenium and Playwright, despite their open-source nature, present challenges in terms of scalability, maintenance, and cross-browser compatibility. Consider exploring other options that address these limitations and provide a more efficient testing experience.

TestGrid offers a modern approach to end-to-end testing with its AI-powered codeless platform. TestGrid provides a comprehensive suite of features to simplify and accelerate your testing process:

• Test your web applications and mobile apps across a wide range of browsers, devices, and operating systems. Ensure your app delivers a consistent and flawless experience on all platforms.
• TestGrid’s AI capabilities automatically generate test cases from user stories, requirements, and other artifacts. This eliminates the need for manual script writing and saves you valuable time.
• Identify visual regressions and ensure your app’s UI elements look and function as intended. TestGrid’s visual testing capabilities help you maintain a consistent user experience.
• Seamlessly integrate TestGrid with your existing development and collaboration tools like Jira, Teams, and more. This streamlines your workflow and improves team communication
• Generate comprehensive test reports with detailed insights on test execution, defect tracking, and overall test coverage.
• No need for local installation or setup! Simply create and run automated tests directly on the cloud, eliminating infrastructure management overhead.

Playwright vs Selenium: Which Should You Choose?

Choosing between Playwright and Selenium comes down to three questions: How modern is your tech stack? How broad is your browser compatibility requirement? And how much setup complexity can your team absorb?

If your team needs speed, auto-waiting, built-in API, and visual testing, and minimal configuration for parallel execution, Playwright is the stronger choice for modern web projects.

If your project demands support for older browsers like Internet Explorer, relies on an established Selenium Grid infrastructure, or benefits from a wider ecosystem of community plugins and framework integrations, Selenium remains the more versatile, battle-tested option.

For most greenfield projects starting today, Playwright’s modern architecture and simpler developer experience give it a clear edge. For legacy or enterprise environments with deep Selenium investment, migration may not be worth the cost.