Selenium
Selenium: A free browser automation standard with broad language, browser, and execution options. Ranked #3 of 32 in End-to-End Testing Software by our editors (9.1/10); pricing: Free plan; best for engineering teams wanting a free browser standard.
At a glance
- Editor score9.1 / 10
- PricingFree plan
- Best forEngineering teams wanting a free browser standard
- Free planYes
- Paid fromFree
- Test authoringCode
- Founded2004
- Facts checked21 Sep 2026
Where it wins
- Free, open-source browser automation with Apache 2.0 licensing
- WebDriver, Selenium IDE, Grid, parallel execution, and cross-browser testing
- Supports multiple languages, remote execution, and self-hosted runners
Where it doesn't
- Does not include a testing framework or built-in test runner
- Requires teams to pair Selenium with a language-specific test runner
- Broader setup and maintenance responsibilities than a hosted testing service
Our verdict on Selenium
Selenium is an open-source suite for automating web browsers, aimed primarily at developers and QA teams building browser-based regression and end-to-end tests. Its WebDriver component provides language-specific client bindings and a standard API for controlling browsers locally or remotely. Selenium IDE adds record-and-playback authoring, while Selenium Grid distributes WebDriver scripts across remote machines, browsers, versions, and operating systems. The project has been established since 2004 and supports web, Chrome extension, API, and self-hosted use cases.
The strongest fit is its depth as a browser automation standard. WebDriver supports native browser control and the W3C WebDriver standard, with testing across multiple browser engines and operating systems. Teams can capture browser and element screenshots, run tests in parallel across multiple machines, and use Selenium Grid for remote execution. Language-specific bindings make code-based authoring practical for engineering teams, while Selenium IDE offers a lower-code entry point for recording and replaying browser interactions. Mobile web testing is also included in its category support.
Selenium is free and open-source, with the project code and documentation licensed under Apache 2.0. Its platform breadth and self-hosted model suit teams that want control over execution environments and are prepared to manage their own test infrastructure. The main limitation is scope: Selenium does not include a testing framework, so teams typically pair it with a language-specific test runner. Choose Selenium when browser control, language flexibility, parallel execution, and self-hosting matter most. Consider an alternative when a managed service or an integrated testing framework is a higher priority.
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Selenium pricing
Selenium fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Test authoring | Code |
| Browser support | Cross_browser |
| Parallel runs | Not verified |
| Self-hosted runner | Yes |
| Mobile web testing | Yes |
| Visual testing | Not verified |
| Deployment | Self-hosted, Browser extension |
| Platforms | Web, Windows, macOS, Linux, Chrome extension |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | selenium.dev |
| Facts checked | 21 Sep 2026 |
Alternatives to Selenium
- PlaywrightA free, open-source framework for broad browser coverage and scalable web E2E suites.9.4
- WebdriverIOA free, open-source choice for code-based web and mobile testing across multiple engines.9.2
- CypressA flexible JavaScript testing framework with free local execution and paid CI collaboration features.9.0
See all Selenium alternatives →
Selenium vs the competition
- Selenium vs Playwright
- Selenium vs WebdriverIO
- Selenium vs Cypress
- Selenium vs Nightwatch
- Selenium vs TestMu AI Web Automation (formerly LambdaTest Web Automation)
- Selenium vs ACCELQ
Compare Selenium with any tool side by side →
Also Ranked In
Selenium is ranked in 13 of our directories; the 6 strongest besides End-to-End Testing Software.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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