Functional Testing Services

Being a reputable functional testing company with a decade of experience, Relevant is trusted by world-class companies and startups. Keep on reading to learn the key types of testing services we offer!

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Client testimonials

«We now have a core team of engineers at Relevant who work for us full-time and are supplemented by 4 or 5 engineers with different skillsets when and if required.»

Paul Carse
CTO and Co-founder of Life Moments

“Working with you guys has been fantastic. The level of expertise of your development team is as good as the people that we get in the UK. You’ve got a fantastic talent base of programmers. It’s more challenging to find people of that quality in the UK.”

Cassian Harrison
Co-founder of Splink Industries and My Theory Test App by James May
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Functional Testing Services We Deliver

Feature testing

With feature testing, clients can be sure that their brand new features or modifications within the existing software are stable, convenient, efficient, and deliver a first-class user experience (UX).

Full system testing

Comprehensive testing allows the evaluation of the end-to-end system specifications, from both internal (code) and external (client-side) perspectives, so as to prepare for the beta product testing.

Regression testing

This service enables the successful maintenance and timely update of the software after the development cycle, thus ensuring the entire system, as well as its components, is bug-free and efficient.

Automated functional testing

Apart from manual software testing, our developers can also apply innovative dev tools, advanced solutions, and approaches for automated performance checkups using various testing codes.

Database testing

Relevant experts are highly expertized in building complex queries to conduct load or stress tests to check the database responsiveness. The components it covers include schema, tables, triggers, etc.

Localization testing

Localization testing allows ensuring the software offers the required functionality and usability in a particular locale (i.e. linguistic and cultural aspects), which is a must for the global market.

We also provide
  • • QA Testing
  • • Application Testing Services
  • • Web Application Testing
  • • Manual Testing Services
  • • Automated Testing Services
  • • Automated Testing Services
  • • Performance Testing
  • • Integration Testing
  • • Regression Testing
  • • Cloud Testing
  • • Software Testing Consulting

Why Is Relevant a Good Choice for Functional Testing Services?


Agile Methodology

The agile approach helps us to become more flexible and problem-oriented, and deliver high-quality results in a faster and more efficient way.


Dedicated Project Manager

At Relevant, each of our leaders possesses vast experience in planning, organization, execution, and project delivery across different industries.


80% Employee Retention Rate

An efficient HR management and excellent career opportunities help us to keep a strong and highly expertized team that stays with us for years.


9/10 Client Satisfaction Score

First-class service and decent quality of the services enabled us to provide a personalized experience to all clients regardless of the project type. 


92% Of Senior and Middle Engineers

Unlike other firms, nearly all the professionals at Relevant feature deep expertise in development, testing, and management, which is clearly traced in our products delivered.


Risk Handling

We constantly improve practices, tools, and methods of risk management. This holistic approach makes us a reliable partner, not just a supplier.

Success cases

My Theory Test app by James May
Building #1 driving app in the UK
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Updating a web portal for one of the largest Minecraft servers
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Building a platform for the UK's leading sports medicine service provider
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What is web functional testing?

In web development, functional testing is the performance checkup process of a web application or website for potential bugs and specification aspects of the product functionality before its final release. Also, it validates that all product requirements and functions conform to certain specifications.

Why is functional testing important?

Functional testing helps quality assurance teams to timely identify the existing performance issues that affect the quality and/or functionality of specific software. As a rule, the verification is based on the Software Requirements Specification (SRS) and allows us to ensure the system functions as per the UX.

What is meant by functional testing?

Functional testing is also known as Behavioral Testing, which focuses on the underlying application features, so as to ensure they work as per user requirements. The major elements it covers are unit testing, integration testing, user acceptance testing, regression testing, and localization testing.

What is the role of a functional tester?

The key goal of a functional tester is to ensure the product is aligned with the specifications by testing the functionality of the software. Additionally, he ensures that test scenarios including boundary cases and failure paths are accounted for.

Which tools are applied for functional automation?

Functional testing services can be performed manually and with the help of automated software solutions. Some of the most frequently-used tools for functional software checkups are Selenium, UFT, SoapUI, IBM Rational Functional Tester, Postman, Apache JMeter, Test Complete, and Katalon Studio.

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