Quality Assurance Services

KeyUA has all the necessary advanced tools and knowledge that a solid QA testing services company should have. Since 2008, we have been providing quality checks & solutions for the products that we build and web and mobile apps created by third-party developers.

What is Included in Quality Assurance Services

Qualitative testing must accompany every product before entering the market. By identifying defects in a timely manner, you will protect yourself from failures, loss of investments, and even secure confidential data stored inside the system. The KeyUA QA unit has provided quality assurance testing services for more than 150 projects, carefully checking functionality and providing recommendations for improvement.
  • Functional Testing
  • System Testing
  • Performance Testing
  • Regression Testing
  • Security Testing
  • Usability Testing
  • Mobile App Testing
  • Web App Testing
  • Technical Writing

Functional Testing

Functional testing occurs when it is necessary to verify the conformity of the system features to the stated requirements. KeyUA specialists carefully check software and applications both with or without specification.

  • White box testing
  • Black box testing
  • Full checking of basic functionality

System Testing

If you are looking for someone who can conduct high-level testing of all the software, we would be happy to help you with this. Our team will prepare comprehensive test cases and verify compliance with functional and non-functional requirements.

  • Check unintended application use cases
  • Environment compatibility checking
  • Alpha & beta testing

Performance Testing

Do you need to determine how fast the system works, how it behaves under load, or what its maximum throughput is? Our quality assurance experts carry out comprehensive tests to determine the maximum parameters at which the system will work normally, as well as identify the results at which the system stops responding.

  • Load testing
  • Stress testing
  • Cloud channel testing

Regression Testing

Adding new features may cause old features to fail. The purpose of regression testing is to determine how changes in the system affect its functionality as a whole, identifying defects in the new and old functionality.

  • Full testing of all components
  • Version testing
  • Checking of already fixed bugs

Security Testing

Want to check how strong the security of your software is? Our testing services focus on providing a holistic approach to application security, including detection of bottlenecks, malware, and access to private data.

  • Authentication testing
  • Internal processes check
  • Examine the business logic

Usability Testing

You need usability testing when you want to check if the product interface is user-friendly, understandable, and attractive. KeyUA testers will quickly deduct any problems associated with UX and UI.

  • Testing the design and its functionality
  • Remote usability testing
  • Comparison with competitors

Mobile App Testing

Our team can test any mobile applications for iOS and Android to make sure that they work on each platform in accordance with the stated requirements. The quality assurance process can take place both with and without a specification. We test only on real devices, as well as emulators.

  • Testing internal functions, as well as integration with third-party services
  • Localization testing
  • Authorization and security testing

Web App Testing

KeyUA quality assurance experts test websites & web applications, e-commerce platforms, social networks, and much more. We check the product in all popular browsers (including the latest versions as well as older versions that are still supported) for client’s consumers to make sure that it operates correctly and has a proper design on various screen sizes.

  • Learn technical documentation
  • Visual testing
  • Simultaneous examination

Technical Writing

Our team writes all the necessary technical testing documentation to ensure the best possible software testing coverage.

  • Test cases creation
  • Test plan creation
  • Test suite preparation

Quality Assurance Solutions

We direct all efforts to maintain the high quality of the product at all stages of development and even after release.
Manual Testing
KeyUA testing specialists model all types of user behavior in order to identify software vulnerabilities and incorrect functionality. We carefully check how the application works with all operating systems.
Automated Testing
Autotests guarantee the right performance of critical parts of the system. They are created to check important functionality in a short time, accelerating time to market. Our testing experts have an extended pool of tools for automation, with a focus on Selenium.
Unit Testing
Unit testing is performed by developers immediately after writing the code. It means that software engineers create a program that tests their code. It's a good way to quickly identify numerous errors and reduce the testing time of QA specialists.
Code Audit & Refactoring
The code is audited by a developer who did not write the tested functionality in order to determine how the code can be improved from an independent point of view. Refactoring is also equally essential, as it enables software engineers to significantly improve the speed and performance of the system, without changing the basic functionality. KeyUA developers are fully result-oriented and deliver top-notch code even in a short time.

Why Key UA is the Best in Supporting Your Business

Strict product quality control and quick market entry are our top priorities. As a quality assurance testing company, KeyUA satisfies the highest quality standards in web and mobile application development.

Preparation of full testing documentation

Result-driven approach

A clear understanding of business goals

Fast time-to-market

ISTQB-certified specialists

Risk assessment

Dedicated test lab

Agile methodology


years of practice providing software quality assurance services


experienced team members


successfully delivered & tested projects


data security

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Project Steps

We take a very responsible approach to the testing process to make sure that the product meets the highest quality standards. Our quality assurance process is as follows:

Documentation Analysis

We study the business requirements and project functionality. This step includes working with documentation, as well as cooperating with developers or analysts.


Assessment and Testing Planning

Based on data obtained as a result of the analysis, we develop a testing plan and strategy, including information on which environment the quality control will take place and with what data, the development of basic criteria and standards, etc.


Scripts Development

This step is the creation of all possible scenarios of user behavior in order to find the conditions under which the system starts to work incorrectly.



We begin to check the app for compliance with the stated requirements.



At the end of testing, we create detailed reports on the gathered results, as well as set tasks for developers if something needs to be fixed.

Examples of Our Successful Projects

At KeyUA we provide services for beginner entrepreneurs, federal agencies, corporate clients, and large businesses. Over the 12 years, we have been delivering quality web apps to the market, most of which we support until now.

Clients Speak About Us

Our customers’ reviews are the best demonstration of the quality of service we provide.

Frequently Asked Questions

Below we have prepared a list of the most common questions that customers ask us.
What is the cost of app testing?

The price depends on multiple factors, including the complexity of the functionality and the number of specialists who will work on the software. You can contact our technical experts to get an assessment of your project, including plan, cost, and time.

What do you need to test my application?

In order to start working on your project, we must get a specification with requirements, access to the product, mockups, and source code (if you want us to conduct code auditing, unit testing, or refactoring). You can give us the requirements orally, after which our specialists will prepare the relevant documentation.

Can you fix bugs in my software?

Yes, we can fix any inconsistencies in your mobile or online application, even if we did not write the code. To do this, our team will need to first check your mobile or web application and compile a report. After which, we can sign a contract with you for development, and our engineers will begin to correct the code.

Contact Our Experts Right Now

If you have questions or want to order services, feel free to contact us.
Manager Daria Maltseva

Daria Maltseva

Product Manager

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