# Selenium vs WebdriverIO

**Leader by vioscaleAI score:** Selenium

| Attribute | Selenium | WebdriverIO |
|---|---|---|
| **vioscaleAI score** | 71.7 (76% (high)) | 47.1 (22% (low)) |
| activity.commits_last_30d | 100 | 3 |
| adoption.dependent_repos | 98,124 | - |
| adoption.github_stars | 34,541 | 6 |
| adoption.package_downloads_weekly | 6,935,447 | - |
| content.faq | `[{"answer":"Open-source tool that automates web browsers to enable automated testing of web applications, regression testing, and automation of repetitive web-based administrative tasks. Includes WebDriver for robust test automation, IDE for record-and-playback scripting, and Grid for distributed test execution. It is indexed under Testing Tools.","source":"https://www.selenium.dev","question":"What is Selenium?","confidence":0.6},{"answer":"Selenium is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://www.selenium.dev","question":"Is Selenium free to use?","confidence":0.6},{"answer":"Selenium supports Windows, macOS, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.selenium.dev","question":"What platforms does Selenium support?","confidence":0.6},{"answer":"Yes. Selenium can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://www.selenium.dev","question":"Can Selenium be self-hosted?","confidence":0.6},{"answer":"We have confirmed 4 integrations for Selenium, including Chrome, Firefox, Edge and Appium. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.selenium.dev","question":"What does Selenium integrate with?","confidence":0.6},{"answer":"Yes. Selenium is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/SeleniumHQ/selenium","question":"Is Selenium open source?","confidence":0.99}]` | `[{"answer":"A test automation framework supporting e2e, unit, and component testing using WebDriver, WebDriver BiDi, and Appium automation technology. It is indexed under Testing Tools.","source":"https://webdriver.io","question":"What is WebdriverIO?","confidence":0.6},{"answer":"WebdriverIO is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.","source":"https://webdriver.io","question":"Is WebdriverIO free to use?","confidence":0.6},{"answer":"WebdriverIO supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://webdriver.io","question":"What platforms does WebdriverIO support?","confidence":0.6},{"answer":"Yes. WebdriverIO can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://webdriver.io","question":"Can WebdriverIO be self-hosted?","confidence":0.6},{"answer":"We have confirmed 13 integrations for WebdriverIO, including Sauce Labs, BrowserStack, TestingBot, TestMu AI, Appium, WebDriver, Allure and JUnit, plus 5 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://webdriver.io","question":"What does WebdriverIO integrate with?","confidence":0.6},{"answer":"Yes. WebdriverIO is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/webdriverio/i18n","question":"Is WebdriverIO open source?","confidence":0.95}]` |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | Selenium is an open-source testing framework that automates web browsers for testing applications and automating web-based administration tasks across multiple programming languages. | Enables automated testing of web browsers, mobile applications, and desktop software with built-in capabilities for network simulation, automatic waiting, and result reporting. |
| features.capabilities | `{"protocol":"multi","languages":"Java, JavaScript, Python, Ruby, .NET","test_types":"e2e","open_source":true,"headless_mode":true,"ci_integration":true,"no_code_recorder":true,"browser_automation":true,"parallel_execution":true}` | `{"mocking":true,"languages":"JavaScript (Node.js)","assertions":true,"test_types":"e2e","open_source":true,"ci_integration":true,"auto_wait_retry":true,"no_code_recorder":true,"browser_automation":true,"network_interception":true,"ai_self_healing_locators":true}` |
| integrations.count | 5 | 14 |
| integrations.list | `[{"name":"Chrome"},{"name":"Firefox"},{"name":"Edge"},{"name":"Appium"},{"name":"Chrome for Testing (CfT)"}]` | `[{"name":"Sauce Labs"},{"name":"BrowserStack"},{"name":"TestingBot"},{"name":"TestMu AI"},{"name":"Appium"},{"name":"WebDriver"},{"name":"WebDriver BiDi"},{"name":"Allure"},{"name":"JUnit"},{"name":"Spec Reporter"},{"name":"Dot Reporter"},{"name":"SumoLogic"},{"name":"Concise Reporter"},{"name":"Lighthouse"},{"name":"Axe Core","category":"accessibility","direction":"inbound"},{"name":"Percy","category":"visual-testing","direction":"outbound"}]` |
| language.primary | Java | TypeScript |
| license.spdx | Apache-2.0 | MIT |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"web":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://www.selenium.dev","retrievedAt":"2026-10-13T15:12:44.428Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://webdriver.io","retrievedAt":"2026-08-13T18:18:54.491Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 30 | - |
| release.history | `[{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/nightly","date":"2026-10-13T00:30:25Z","type":"prerelease","version":"nightly"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.51.0","date":"2026-10-09T19:18:18Z","type":"stable","version":"selenium-4.51.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.50.0","date":"2026-09-30T22:16:28Z","type":"stable","version":"selenium-4.50.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.49.0","date":"2026-09-09T15:35:47Z","type":"stable","version":"selenium-4.49.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.48.0","date":"2026-08-27T20:13:03Z","type":"stable","version":"selenium-4.48.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.47.0","date":"2026-08-10T18:00:07Z","type":"stable","version":"selenium-4.47.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.46.0","date":"2026-07-11T00:47:53Z","type":"stable","version":"selenium-4.46.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.45.0","date":"2026-06-16T13:59:48Z","type":"stable","version":"selenium-4.45.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.44.0","date":"2026-05-12T23:58:59Z","type":"stable","version":"selenium-4.44.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.43.0","date":"2026-04-10T06:52:53Z","type":"stable","version":"selenium-4.43.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.42.0","date":"2026-04-09T11:53:47Z","type":"stable","version":"selenium-4.42.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.41.0","date":"2026-02-20T15:57:35Z","type":"stable","version":"selenium-4.41.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.40.0","date":"2026-01-18T23:53:16Z","type":"stable","version":"selenium-4.40.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.39.0","date":"2025-12-06T22:53:26Z","type":"stable","version":"selenium-4.39.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.38.0","date":"2025-10-25T05:01:29Z","type":"stable","version":"selenium-4.38.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.37.0","date":"2025-10-18T05:02:55Z","type":"stable","version":"selenium-4.37.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.36.0","date":"2025-10-02T15:37:23Z","type":"stable","version":"selenium-4.36.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.35.0","date":"2025-08-12T15:44:30Z","type":"stable","version":"selenium-4.35.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.34.0","date":"2025-06-29T18:25:54Z","type":"stable","version":"selenium-4.34.0"},{"url":"https://github.com/SeleniumHQ/selenium/releases/tag/selenium-4.33.0","date":"2025-05-23T17:42:58Z","type":"stable","version":"selenium-4.33.0"}]` | - |
| reliability.status_page | yes | yes |
| security.scorecard | 2.9 | - |
| security.trust_center | https://www.selenium.dev/categories/security/ | https://webdriver.io/docs/security |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.seleniumhq.selenium%3Aselenium-java&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (Testing Tools)

| Capability | Selenium | WebdriverIO |
|---|:--:|:--:|
| **Core** |  |  |
| Test types | Unit + integration + E2E | Unit + integration + E2E |
| Browser automation | ✓ | ✓ |
| Built-in assertion library | - | ✓ |
| Languages | Java, JavaScript, Python, Ruby, .NET | JavaScript (Node.js) |
| **Isolation** |  |  |
| Mocking / stubbing | - | ✓ |
| **Techniques** |  |  |
| Snapshot testing | - | - |
| **Performance** |  |  |
| Parallel execution | ✓ | - |
| **Insight** |  |  |
| Code coverage | - | - |
| **DX** |  |  |
| Watch mode | - | - |
| **Ops** |  |  |
| CI integration | ✓ | ✓ |

*Source: vioscaleAI. Generated 2026-10-17T05:41:43.570Z. "-" = undocumented, not absent.*