Test Complete and Selenium are both popular tools used for automated software testing, but they are different in their nature and capabilities.

1. Test Complete: Test Complete is a commercial automated testing tool developed by SmartBear Software. It is primarily used for functional testing of software applications, including web applications, desktop applications, and mobile applications. Test Complete supports multiple scripting languages, such as JavaScript, Python, VBScript, and C#, making it accessible to testers and developers with different language preferences.

Key features of Test Complete include:

• Cross-browser testing: It allows you to test web applications across different browsers and browser versions.
• GUI testing: Test Complete offers a record-and-playback functionality for creating automated test scripts based on interactions with the application’s graphical user interface (GUI).
• Object recognition: TestComplete uses a unique technology called “Test Visualizer” to identify and interact with objects in the application, making test maintenance easier.
• Data-driven testing: It supports data-driven testing, where test data can be fed from external sources like Excel or databases.
• Integration with other tools: TestComplete can integrate with various third-party tools like JIRA, Jenkins, and Git for seamless test management and continuous integration.

2. Selenium: Selenium is an open-source automated testing framework primarily used for web application testing. It provides a set of tools and libraries that enable testers to automate interactions with web browsers. Selenium supports multiple programming languages, including Java, Python, C#, JavaScript, Ruby, and more, making it highly flexible and versatile.

Key features of Selenium include:

• Cross-browser testing: Selenium allows you to test web applications across different browsers and platforms, ensuring compatibility and consistency.
• Multi-language support: Selenium offers support for multiple programming languages, making it suitable for teams with diverse skill sets.
• Flexibility: It allows testers to have more control over their test scripts and offers extensive support for customizations and integrations.
• Headless testing: Selenium can execute tests in a headless mode, which means tests can run without the need for a visible browser interface.
• Selenium WebDriver: WebDriver is the core component of Selenium that provides a programming interface for interacting with browsers programmatically.

In summary, Test Complete is a commercial tool that supports automated testing of various application types, while Selenium is an open-source framework primarily designed for web application testing. The choice between the two depends on specific requirements, budget, and the type of applications you need to test.