Compare the Top Free Functional Testing Tools as of October 2025

What are Free Functional Testing Tools?

Functional testing tools are software platforms designed to verify that a system or application performs as expected according to its functional requirements. These tools automate the process of testing individual features and functionalities of an application to ensure they work correctly. Functional testing tools typically support a variety of testing types, including unit testing, integration testing, and user acceptance testing (UAT). They allow testers to simulate user interactions with the application, execute test cases, and identify bugs or issues in the functional behavior of the software. By automating repetitive testing tasks and improving accuracy, functional testing tools help accelerate the software development lifecycle and ensure high-quality releases. Compare and read user reviews of the best Free Functional Testing tools currently available using the table below. This list is updated regularly.

  • 1
    Testim

    Testim

    Tricentis

    Testim is the fastest path to resilient end-to-end tests—codeless, coded or both. Testim lets you create amazingly stable codeless tests that leverage our AI, but also the flexibility to export tests as code. You can leverage Testim’s modern JavaScript API and your IDE to debug, customize or refactor tests. Store them in your version control system to keep them in sync with branches and run tests on every commit. Run parallel, cross-browser tests on our test cloud or Selenium-compatible grids while integrating with your CI and dev tools to run smoke tests on pull requests, end-to-end tests on release candidates, or full regression suites on a schedule. Customers like Microsoft, Salesforce, NetApp, Wix, and JFrog run millions of tests on Testim each month. Learn more on our website and sign up for your free account!
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    Starting Price: $20,000 a year
  • 2
    LambdaTest

    LambdaTest

    LambdaTest

    LambdaTest is a cloud-based testing platform that provides developers with tools to perform automated and manual cross-browser testing, mobile app testing, and visual regression testing. It supports over 3,000 browser versions and real devices, ensuring seamless performance across platforms. LambdaTest’s AI-driven features, such as test orchestration through HyperExecute and its native test intelligence, help teams reduce test execution time and enhance productivity. The platform also includes tools like Selenium, Cypress, and Appium integrations, enabling rapid and efficient test creation for both web and mobile applications.
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    Starting Price: $15.00/month
  • 3
    Sauce Labs

    Sauce Labs

    Sauce Labs

    Sauce Labs provides the world’s largest continuous testing cloud for web and mobile applications, giving development teams at the world's top digital brands access to a comprehensive and trusted solution they can use to deliver apps faster without compromising quality. Release better mobile apps to the market faster with extensive device and test coverage, streamlined beta app distribution, best-in-class error monitoring, and continuous feedback loops throughout your app development cycle. Ensure that your mobile apps work as they should in real-world scenarios, on any device, any browser, every time. Sauce Labs end-to-end mobile quality solutions enable organizations delivering mobile apps in the modern era of DevOps-driven development to achieve quality at speed throughout all stages of the app development journey - from development to production. No matter your testing needs,the application type you are developing, or your role in the mobile app SDLC, we've got you covered!
    Starting Price: $19 per user per month
  • 4
    iMacros

    iMacros

    Progress

    The world's most popular web automation, data extraction, and web testing solution, now with Chromium browser technology for supporting all modern websites. Including sites that use dialog boxes, Javascript, Flash, Flex, Java, and AJAX. Perform in-browser testing across Chrome and Firefox. Write to standard file formats or use the API to save directly to a database. iMacros web automation software works with every website to make it easy for you to record and replay repetitious work. Automate tasks across Chrome and Firefox. There is no new scripting language to learn, allowing you to easily record and replay actions on each browser, so even the most complex tasks can be automated. Automate functional, performance, and regression testing across modern websites and capture exact web page response times. Schedule macros to run periodically against your production website to ensure it is up and running and behaving exactly as you expect.
    Starting Price: $99 per month
  • 5
    Katalon Studio
    An all-in-one test automation solution Get started in no time, scale up with no limit, for any team, at any level. Katalon Studio Robust test generation on all platforms Productive IDE to generate automated tests easily for all platforms and OSs, regardless of application complexity. Powerful recording utility for effortlessly storing all UI elements to maximize reusability. Codeless experience for beginners. Infinite testing extension for experts. Set Up Projects Built-in project templates Start immediately with ready-made templates, test case libraries, keywords, and object repositories. All kinds of end-to-end testing in one place Uniquely perform web, mobile, API, and desktop testing – all in a single project.
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    Eggplant

    Eggplant

    Keysight Technologies

    At Eggplant we empower organizations to create amazing digital experiences. We help businesses to test, monitor and analyze their end-to-end customer experience and continuously improve their business outcomes. Companies worldwide use Eggplant to surpass competitors, boost productivity, and delight customers. How? By dramatically enhancing the quality, responsiveness, and performance of their software applications across different interfaces, platforms, browsers, and devices - including mobile, IoT, and desktop — in agile, DevOps, and innovative application and data environments. As software release cycles accelerate, manual testing can't keep up. AI automatically discovers user journeys, hunts for bugs and performs image-based UI tests from the user POV. Build better software with fast, broad, accurate AI-powered testing. To keep up with DevOps, continuous testing is key, streamlining development and automating the testing process.
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