20 Best Functional Testing Tools For QA In 2025

Testim Automate is an automated testing platform for fast authoring of AI-powered stable tests and tools to help you scale quality. The tool uses AI to identify and lock in visual elements, allowing you to increase test stability of UI functional tests. Your tests can be extended with custom JavaScript that can run in or out of the browser.

Testim tests are recorded and then edited in its visual editor, allowing you to better organize your test cases. The tool offers AI-based locators that automatically lock in elements, and test steps are discrete objects that can be configured, shared, grouped and parameterized, providing you and your team with the means to streamline your processes within your application lifecycle. Testim also helps keep tests clean by identifying duplicate test steps to be replaced by shared objects.

The cost of Testim begins at $1000 per month. The tool also offers a free version with up to 1000 test runs per month.

testRigor is a regression testing tool that stands out when it comes to the new era of AI-based automation tools. The tool allows you to create tests in plain English, with elements being referenced from a human perspective. testRigor analyzes all possible parameters behind the scenes to use the most useful ones, which results in ultra-reliable tests.

testRigor allows you to dramatically decrease your test maintenance, by allowing you and your team to spend 95% less time on it on average. Instead, the tool allows you to seamlessly build new tests and increase test coverage. testRigor makes the process of converting existing manual test cases into automated tests very straightforward, and users can also define and customize their own wording if they desire.

The cost of testRigor starts at $300 per month and can be tailored to your specific needs. There is a free 14-day trial with no credit card information required upfront.

QA Wolf is a platform and service that specializes in automated end-to-end testing, which is a key aspect of functional testing. The platform automates the testing of user interactions with web applications to ensure that all functionalities perform as intended. By simulating real user behaviors, QA Wolf validates the functionality of various features within the application, ensuring that it meets the required specifications and works correctly from a user's perspective.

When tests fail, QA Wolf generates detailed bug reports that include video recordings, screenshots, and trace logs. The platform also supports running multiple tests in parallel, speeding up the testing process and providing faster feedback on the functionality of different features. Furthermore, all testing is designed and deployed by QA Wolf's expert team, even offering 24-hour monitoring and maintenance of the entire test suite.

Pricing is available upon request. Integrations include GitHub, GitLab, Bitbucket, Jenkins, CircleCI, Jira, Asana, Linear, Slack, Microsoft Teams, Travis CI, and Azure DevOps.

Testlio is a functional testing platform that provides AI-driven, data-powered testing across real-world devices. It offers a centralized hub for managing tests, people, devices, and decisions, helping teams release software faster while maintaining high quality. 

Testlio stands out as a functional testing tool because it provides holistic testing management through its centralized platform. It enables teams to build and oversee test plans, runs, and issues efficiently, ensuring comprehensive coverage. The platform’s AI-powered capabilities assist in test creation, execution, and refactoring, reducing the time required to complete testing cycles. Combined with Testlio’s managed services, you can rapidly execute functional tests while maintaining control over every stage of the process.

I also like Testlio’s extensive device management capabilities. With access to over 600,000 real-world devices, you can test applications in diverse environments that closely mimic actual user conditions. 

New Relic is an observability platform that offers a wide range of capabilities and integrations for monitoring, debugging, and improving the entire technology stack. While not traditionally categorized as functional testing software, it does offer features that overlap with core aspects of functional testing, particularly through its synthetic monitoring capabilities.

New Relic allows you to create and execute scripted tests that simulate user interactions with your application. This can include testing specific user flows, such as login procedures or checkout processes, to ensure they function correctly under different conditions. This type of testing is particularly valuable for identifying performance issues before they impact end users, which aligns with the goals of functional testing

This software is also ideal for teams looking for robust monitoring, observability, and performance optimization features.

Sauce Labs is a comprehensive continuous testing cloud for web and mobile applications that allows you to complete both manual and automated testing through a variety of testing channels. The tool provides a real device cloud so you can test across multiple devices. Sauce Labs also offers enterprise security and a proprietary data center. 

Sauce Labs offers a variety of automated and manual testing methods, ensuring full test coverage of your applications. The tool provides a cross browser testing feature, which allows you to test end-to-end on various browsers. Sauce Labs also offers the ability to complete automated mobile testing so you can write tests for various devices to ensure your application runs smoothly.  

Sauce Labs offers integrations with platforms such as Github, Jenkins and Bamboo, as well as chat applications such as Slack.

The cost of Sauce Labs starts at $39/month for the Live Testing package. The tool also offers a 28-day free trial. 

Tricentis SeaLights is a quality intelligence platform designed to help development and QA teams deliver high-quality software efficiently.  

One of the primary features that makes Tricentis SeaLights stand out is its test impact analytics, which allows you to execute only the critical tests related to recent code changes. This significantly shortens the testing cycle time and reduces troubleshooting costs. Additionally, test gap analytics identifies untested code changes, ensuring that all potential gaps are covered, therefore minimizing production defects.

SeaLights also includes advanced code coverage capabilities, providing thorough analysis across various testing types, such as end-to-end, functional, regression, and manual tests.

Kobiton is a cloud-based mobile app testing platform that allows you to build and execute manual and automated functional, performance, and visual Tests against real Android and iOS devices. You can automate your tests using both the Kobiton AI-driven scriptless solution and AI-assisted script generation.

Kobiton allows for parallel testing, giving you the ability to run concurrent tests easily. Using Selenium Webdriver, you and your development team can run multiple tests in parallel across various browser and device combinations. You can also run a full device lab consisting of local devices, private and public cloud devices.

Kobiton’s scriptless automation empowers mobile test automation without requiring complex Appium scripts. It also allows you to convert manual test sessions into dynamic automated test scripts.

The cost of Kobiton starts at $50/month. The tool also offers a free 14 day trial with no credit card information required upfront.

SmartBear ReadyAPI is a functional testing tool that is specifically designed for testing APIs, and works well with DevOps and agile methodologies. ReadyAPI provides you with API functional testing, API performance testing, API security testing and API Web Virtualization to ensure end-to-end quality for all web services. The tool also supports functional security and load testing of RESTful, SOAP, and GraphQL.

ReadyAPI can be integrated into any environment and has a Smart Assertion feature that you can use to create bulk assertions against a vast amount of end points quickly. The tool provides flexible automation options for integrating API testing into you and your team’s CI/CD pipeline during every build. You and your team have the ability to create comprehensive and data-driven functional API tests and can also execute parallel functional tests and job queuing using only their command-line.

ReadyAPI provides integration with platforms such as Jenkins, Git, and Docker.

ReadyAPI starts at $685/year and offers a 14-day free trial.

Leapwork is a no-code regression testing tool that allows your team to create and execute tests across a variety of environments without the need to have coding experience. The tool is cloud-based, and offers testing in both web and desktop application environments within the same workflow. Leapwork is simple to implement within your team, and provides a growing base of written documentation, videos and articles. 

Leapwork provides an array of features such as debugging, parallelization, compliance management, approval process control and recurring tests. The tool allows you to record processes and test cases in context, validate the test steps and input data. Leapwork will then build the processes in a graphical flowchart with logic, making it easy for the non-technical members of your team to review and take action. 

Leapwork integrates with platforms such as Microsoft Azure DevOps, Jenkins and TeamCity. 

Leapwork provides customized pricing upon request.