In this post, we will see the best Automation Testing Tools for 2021.

What is Automation Testing?

Automation testing is the process of testing the software using an automation tool to find the  defects . In this process, executing the test scripts and generating the results are performed automatically by automation tools. Some most popular tools to do automation testing are HP QTP/UFT,  Selenium WebDriver , etc.,

Read this comprehensive Automation Testing Tutorial .

Most Popular Automation Tools Comparision Table

Product Kobiton Selenium Subject 7 Katalon Studio Test Complete UFT
Available since 2015 2004 2011 2015 1999 1998
Application Under Test Mobile apps Web apps Web (UI & API), Mobile, Desktop, Database Web (UI & API), Mobile apps Web (UI & API), Mobile, Desktop apps Web (UI & API), Mobile, Desktop, Packaged apps
Pricing Commercial Free Commercial Free Commercial Commercial
Supported Platforms Installed – Mac
Windows Windows Windows
Scripting Languages Java (but barely needed) Java, C#, Perl, Python, JavaScript, Ruby, PHP Java (but barely needed) Java/Groovy JavaScript, Python, VBScript, JScript, Delphi, C++, and C# VBScript
Programming Skills Not required. Advanced skills needed to integrate various tools Not required.
Recommended to write plugins.
Not required.
Recommended for advanced test scripts.
Not required.
Recommended for advanced test scripts.
Not required.
Recommended for advanced test scripts.
Ease of Installation and use Easy to setup and use. Require advanced skills to install and use SaaS – No installation needed. Extremely easy to use. Easy to setup and use. Easy to setup. Need training to properly use the tool. Complex in installation. Need training to properly use the tool.

List of Popular Test Automation Tools:

The demand for automation tools is increasing these days. Here I am going to list automated software testing tools that contains both free and commercial ones. Go through this list, research, and finalize the best tool for your project.

Now that you know of a list, let us take a look at each of them in detail.

#1. Kobiton

Kobiton’s mobile device testing platform accelerates the testing and delivery of mobile applications by offering live device testing in the cloud. Through their Intelligent Test Automation, a scriptless automation solution, Kobiton enables companies to conduct the extensive, automated real-device testing necessary to create flawless experiences for all users on all devices.

It is one of the best mobile automation testing tools in the market.


  • Scriptless Appium automation
  • Automated crash detection
  • Visual validation for a pixel-perfect app on all devices
  • Recommendation Engine powered by AI to help the tester

Website: Kobiton

Pricing: Commercial

To learn Kobiton, read our detailed Kobiton Tutorial .

#2. Selenium

Selenium is an open-source test automation framework that automates web browsers. It becomes a favorite automation tool of choice for automation testers. It acts as a core framework for open-source test automation software such as Watir, Robot Framework, Katalon Studio, and Protractor.

It supports programming languages such as Java, Python, C#, Groovy, PHP, Perl, and Ruby. It supports operating systems such as Windows, Mac, Linux. It supports browsers such as Chrome, Firefox, Internet Explorer, and headless browsers.

Website: Selenium

License: Open-source

To learn Selenium, read our detailed Selenium Tutorial .

#3. Subject7

Subject7 is a State-of-the-art cloud-based platform for end-to-end test automation that covers web, native mobile, desktop, database, web services (REST and SOAP), load testing, security testing, 508/accessibility testing, manual testing, and much more. The Subject7 platform provides end-to-end test automation capabilities through a series of commands. These commands are available via an easy-to-use web interface, hiding the complexities of industry-standard packages such as Selenium, Appium, SikuliX, JMeter, ZAP, and others.

Subject7 Player, which executes these automation commands, is available on users’ machines (for authoring and debugging), in the cloud for parallel execution, as a load-generating engine, and for active or passive security checks, all using the same commands making automation uniform across-the-board.

Extensive APIs allow for integration into JIRA, Jenkins, GitHub, or any DevOps platform for test automation in real-time. It is further available on public, protected, or private clouds (i.e. on-premise).

Website: Subject7

Pricing: Commercial SaaS

#4. Katalon Studio

Katalon Studio is a test automation tool to test web applications, web services, and mobile applications. It is built on top of the Selenium & Appium frameworks.

Even non-programmers can find it easy to start working on Katalon Studio.

It can be integrated into CI/CD processes. It can be integrated with tools like JIRA, qTest, Jenkins, and Git.

Website: Katalon Studio

License: Free

To learn Katalon, read our Katalon Studio Tutorial

#5. UFT

Unified Functional Testing (UFT) software, formerly known as HP QTP (QuickTest Professional). It provides functional and regression test automation for software applications and environments.

It is a commercial tool to perform functional tests. It comes with a feature set for API, web services, and GUI testing of desktop, web, and mobile applications across platforms.

Its advanced object recognition, image-based automation, machine-driven regression testing, image, and text analysis, and synthetic data creation combine to reduce test creation time and test maintenance efforts and boost test coverage and resiliency of testing assets.

Its AI-powered intelligent test automation reduces functional test creation time and maintenance while boosting test coverage and resiliency.

Website: UFT

License: Commercial

#6. Ranorex

Ranorex Studio is an all-in-one test automation tool for desktop, mobile, and web trusted by over 4,000 companies worldwide. The application offers codeless test automation, enabling beginners to test straight away, as well as a complete IDE to give experts the power they need.


  • Reliable object identification, even for web elements with dynamic IDs.
  • Shareable object repository.
  • Reduce test maintenance with reusable code modules.
  • Cross-platform and cross-browser testing.
  • Test in parallel or distribute on a Selenium Grid with built-in Selenium WebDriver.
  • Customizable, easy-to-read test reports.
  • Enable video reporting to see what caused a test to fail without re-running the test.
  • Integrates with a complete testing toolchain: Azure DevOps, Jira, Jenkins, TestRail, Git, and more.
  • It supports integration with selenium to do web application testing.

Official Link:  Ranorex

License: Commercial

#7 LambdaTest

LambdaTest is a Cross-Browser Testing Cloud, allows developers and testers to perform Cross Browser Testing on 2000+ Real Browsers and Operating System Online in varying screen resolutions. It allows us to test on the latest mobile and desktop browsers on the cloud. We can ensure our website is compatible across all browsers and devices by performing Real-time cross Browser Compatibility testing with LambdaTest. We can choose from a wide range of updated Android and iOS mobile devices from the latest to oldest versions of Chrome, Firefox, Safari, Edge, Internet Explorer, Opera, and Yandex. It also allows us to test for responsiveness and take full paged automated screenshots. Supported devices are Windows, Android, iPhone/iPad, Mac, and Web-based.


  • Online Browser Compatibility Testing.
  • 2000+ Real Browsers and Operating System Online in varying screen resolutions.
  • Faster Automated Screenshots / Screenshot testing.
  • Check Responsiveness on All Screen Sizes.
  • Seamless Collaboration and Testing.
  • Testing Locally Hosted Pages.
  • Smart Visual Regression Testing.
  • Resolution Display Testing. Screen resolutions ranging from 800×600 to 2560×1440 are available.
  • LambdaTest Inbuilt Issue Tracker.

Free Trial: Lifetime free (1 concurrent session – 5 users)

Pricing: $15/mo for an annual plan and $19/mo for a monthly plan

Official Link:  LambdaTest

Check out our review on LambdaTest Cross Browser Testing Tool

#8. Watir

Watir stands for Web Application Testing In Ruby. It allows you to write automated tests by facilitates the writing of automated tests by imitating the behavior of a user interacting with a web application.

It is an open-source testing tool. It allows us to do automation testing based on Ruby libraries. It supports  cross-browser testing including Internet Explorer, Firefox, Opera, and headless browser. It supports data-driven testing. It can be integrated with BDD tools like RSpec, Cucumber, and Test/Unit.

Website: Watir

License: Open-source

#9. IBM Rational Functional Tester

IBM Rational Functional Tester is a data-driven testing platform. It supports functional and regression testing. It supports applications such as Java, SAP, .Net, Flex, and Ajax.

It uses Visual Basic .Net and Java as scripting languages.

It comes with a unique feature known as Storyboard testing in which users’ actions on application under test are recorded and visualized in a storyboard format through application screenshots.

It can be integrated with IBM Jazz application lifecycle management systems such as IBM Rational Team Concert and Rational Quality Manager.

Website: IBM RFT

License: Commercial

#10. TestComplete

TestComplete is one of the best automation testing tools to perform desktop, web, and mobile application testing.

TestComplete is a commercial testing tool and it allows you to create reusable tests for all web applications including modern JavaScript frameworks like React and Angular on 2050+ browser and platform configurations.

Its AI-powered object recognition engine and script or scriptless flexibility let you test every desktop, mobile, and web applications with ease.

It allows you to reuse the test scripts. It comes with a visual record and playback and allows you to create even complex automated test scripts without writing a single line of code.

It supports scripting languages like VBScript, JavaScript, and Python. It supports regression testing, keyword-driven testing, and data-driven testing. It can be integrated with Jenkins in a CI process.

It’s GUI object recognition capability can detect and update UI objects automatically similar to UFT  and helps reduce the effort to maintain automation scripts when the application under test is changed.

Website: TestComplete

License: Commercial

#11. EggPlant (TestPlant)

Eggplant’s Digital Automation Intelligence (DAI) platform works with a 2-system model, which allows us to test all devices end-to-end, from the web, mobile, credit card, receipt, and finally emulated and physical POS systems.

It uses scriptless models, AI, and analytics to expand automation beyond test execution across the full testing process. From test-case generation and test optimization to results analytics. It offers CI integration. It supports platforms such as Windows, Linux, Mac, Solaris, and so on.

Website: EggPlant

License: Commercial

#12. Tricentis Tosca

Tricentis Tosca is a Continuous Testing platform that accelerates testing with a script-less, no-code approach for end-to-end test automation. It is a commercial tool and comes with a free trial.

It offers a user-friendly interface and feature set for designing, implementing, executing, managing, optimizing API tests. It can be integrated with DevOps processes.

It supports protocols like HTTP(s), JMS, AMQP, IBM MQ, SOAP, REST, TIBCO EMS. It supports a wide range of technologies and applications such as web, mobile, and API.

Website: Tricentis Tosca

License: Commercial

#13. Robot framework

Robot Framework is an open-source automation framework for acceptance testing, acceptance test-driven development (ATDD), and robotic process automation (RPA). It is free to use without licensing costs. It can be integrated with virtually any tool to create powerful and flexible automation solutions.
It is an application and operating system independent.

It is implemented using Python and also runs on Jython (JVM) and IronPython (.NET).

Even the one who has no coding skills can easily start testing with the robot framework. It can be used not only for web testing but also for iOS and Android automation tests.

Website: Robot Framework

License: Open-source

#14. ZeuZ Test Automation Framework

ZeuZ is a robust test automation platform that allows us to create complex test workflows for web, mobile, desktop, APIs, and cloud apps.

It is AI-supported, scriptless, and easiest to use an automation testing tool. No programming language is required to use this tool. It supports native iOS and Android apps, web apps. It is compatible with all browsers. It supports operating systems such as Windows, Mac, or Linux. It also supports API testing.

It integrates with Jira, GIT, Jenkins, Asana, TeamCity, CircleCi, Gitlab CI, Slack, and many others. It also supports CI/CD workflow.

It supports image comparison, voice recognition, stress testing.

Website: ZeuZ Test Automation Framework

License: Commercial

#15. Cerberus Testing

Cerberus is an open-source, low-code, and scalable test automation solution supporting Web, Desktop, Mobile, API, and Database testing. It allows the creation of automated test scripts through an easy to use web interface without coding skills. It is a community-driven, low-code, continuous end-to-end, and functional testing tool.


  • Built-in test requirements
  • Low-code test library for websites, apps, APIs, desktop, and more
  • Scalable parallel Execution on local and remote testing farms
  • Detailed test report allows you to verify the results across the various environments
  • Trigger campaigns via CI/CD or via the built-in scheduler


  • Free plan for 1 user with 30 test minutes per day
    It has three commercial plans starter, business, and enterprise.
  • Starter plan: 199€ per month
  • Business plan: 399€ per month
  • Enterprise plan: This is a custom plan. You have to contact their sales team.

Website: Cerberus Testing

#16. Mabl

Mabl is a next-generation automated testing tool for web applications. It uses the power of ML & AI to enable easy functional testing of a system. This SaaS service comes with native supports for Firefox, Chrome, Safari, and IE without leveraging any 3rd party test-cloud beyond Mabl.


  • It allows you to reuse your tests across multiple different web browsers
  • You can parallelly run infinite tests
  • Testing nodes are scaled up in the cloud as you need them, with real browser installations on virtual machines.

Pricing: It comes with a free trial. The pricing varies depends on functionality and test runs. You have to contact their sales for personalized pricing.

Website: Mabl

#17.  21 Labs

21Labs is a sophisticated, self-learning AI-based test automation and SDLC platform for Android and iOS applications. It enables you to perform mobile testing.

Pricing: You can opt for its free plan that allows you to have 1 project with 1 user. The pricing of its commercial plans varies depends on the functionality of the tool. You have to contact their sales for personalized pricing.

Website: 21 Labs

#18. Qualibrate

Qualibrate is a 3-in-1 test automation solution used to test SAP and web applications. This is a cloud solution for enterprise softwaer that changes the way teams do document, test, and train end-users. It enables integration with the popular development and management tools available in the market such as Jira , GitHub, GitLab, Jenkins, etc.

Pricing: It comes with two different plans starter and custom. Contact their sales to get a quote.

Website: Qualibrate

FAQs – Automated Application Testing Tools

What Are Test Automation Tool?

A test automation tool is a software that is capable of performing required software testing tasks with little or no manual intervention.

There are a wide range of test automation software available in the market and these tools differ in many ways and some are as follows

1. Applications they test – such as web, desktop, and mobile
2. License – Opensource, Commercial
3. Record and playback feature, Scripting and programming languages they support

In today’s software development world, development practices like quality, customer satisfaction, productivity are changing over time to handle flawless services, release the best products, and tackle shorter delivery times. Software testing and automation tools play a key role in obtaining these goals.

You can check our comprehensive guide to select an automation testing tool . It helps you on how to choose an automation testing tool and in the present post, we will list the most popular test automation tools.

How to select the best Test Automation Tool?

Ask the following questions to yourself to select the best QA automated tool.

1. What tests you would automate?
2. Does your team have required skills to utilize the automation tool?
3. How much budget you have to grab a new automation tool?
4. What kind of features you are looking for from any tool?
5. What are the integration capabilities you are looking for?
6. How difficult is script reusability and maintenance?

Shortlist two to three tools and do a pilot to finalize the best one. Finally, discuss with stakeholders about the selected tool and get approval to proceed to automation.

How many automation testing tools are available?

There are many tools (both open source and commerical) available in the market. We have listed the best automated tools along with the features of each tool in this article.

In conclusion:

Apart from the above-mentioned tools, there are a plethora of other automation testing tools in the market. The automation testing tools list mentioned here is some of the popular QA automation tools. Each and every tool has its unique features to address the challenges of software automation.

If we missed any of your favorite tools, please comment below. We will review them too and include them in this list.

Here I have hand-picked a few posts which will help you to learn more about Software Testing.

  • Best Bug Tracking Tools
  • Best API Testing Tools
  • Popular Test Management Tools
  • Test Strategy Document – A Complete Guide
  • How To Prepare A Test Plan
  • Test Case Template with Detailed Explanation
  • Explain Test Automation Framework
  • Why You Choose Software Testing As A Career
  • Manual Testing Tutorial
  • Selenium Tutorial

If you have any more questions, feel free to ask via comments. If you find this post useful, do share it with your friends on Social Networking.

Disclaimer: The order of tools doesn’t suggest any recommendations. You may choose any tool as per your requirements. 

About The Author:

Katalon Studio is a simple and powerful automation solution built by KMS Technology for testers everywhere. The tool provides comparable features to popular commercial solutions whilst eliminating the effort to build an automation framework from open sources. Best of all, we’re committed to keeping Katalon Studio free.

Update: Above post is recently modified by the STM admin.