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Functional testing services

Functional testing that ensures your vision becomes reality

Minimize business disruption by trusting DeviQA’s 15 years of functional testing experience to identify hidden bugs before they impact end users or customers.

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Our solutions for your functional testing challenges

Whatever your needs, we have the expertise and tools to deliver robust, reliable functional testing services.

Missed bugs in core features

Challenge

85% of software issues reported by end-users are related to core functionality, leading to customer dissatisfaction and revenue loss.

Solution

Rigorous test coverage tailored to your core features ensures no functionality is overlooked, reducing post-release defects by up to 40%.

Inefficient testing process

Challenge

Manual testing consumes up to 30-50% of development time, delaying releases and increasing costs.

Solution

We implement functional automation testing, accelerating repetitive tasks and cutting testing time by up to 70%, enabling faster time-to-market.

Integration issues between modules

Challenge

More than 31% of project failures are caused by poor system integration. Miscommunication between modules often leads to significant downtime.

Solution

Comprehensive integration testing ensures seamless interaction across all modules, preventing costly disruptions.

Uncertainty about user-readiness

Challenge

48% of users uninstall apps due to poor functionality within the first week. A lack of real-world validation increases this risk.

Solution

Acceptance testing validates your application against real-world use cases, ensuring a smooth launch and high user retention rates.

Unstable software after updates

Challenge

Over 77% of tech teams report regressions in functionality after implementing updates, negatively impacting user trust.

Solution

Regression testing identifies and resolves issues caused by changes, maintaining software stability and user satisfaction.

Our software functional
testing services

With 15+ years of experience and proven strategies, we deliver reliable, high-performing software that exceeds expectations.

Automation testing

We speed up the process by automating repetitive tests, increasing efficiency and accuracy.

Unit testing

We test individual components to ensure each part works as expected before moving to bigger systems.

Integration testing

We check how well different modules of your software interact with each other, catching issues early.

System testing

We evaluate the complete system to verify it meets all functional requirements in real-world scenarios.

Acceptance testing

We validate your software against business needs, making sure it's ready for users and stakeholders.

Regression testing

We identify and fix issues that may arise from updates or changes, ensuring nothing breaks over time.

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Case studies

Partner with us:
see the difference

See all stories

Global healthcare giant

Web app testing
Test automation
API testing
Dedicated QA team
  • 90%

    Test coverage

  • 1.6k+

    Test cases created

  • X18

    Faster regression testing run

Read customer story

The first modern real estate platform

Web app testing
Test automation
E2E testing
Load testing
Mobile testing
+2
  • 85%

    Test coverage

  • 2k+

    Test cases created

  • 2.5x

    Faster regression testing run

Read customer story

Dental practice platform

Web app testing
API testing
Dedicated QA team
Mobile testing
+2
  • 95%

    Test coverage

  • 5k+

    Test cases created

  • 3k+

    Number of critical bugs logged

Read customer story

Solution for managing payments

Web app testing
Dedicated QA team
DB testing
API testing
Performance testing
  • 12

    Years of cooperation

  • 100%

    Covered performance

  • 2x

    Faster regression testing time

Read customer story

Booking system for tours and attractions

Web app testing
Test automation
Mobile testing
DB testing
Dedicated QA team
  • 90%

    Test coverage

  • 3.2k+

    Automation test scripts created

  • 1-2h

    Time of regression

Read customer story

Experience the DeviQA difference

From initial consultation to full-scale QA  implementation, we deliver results

DeviQA’s AI advantage

At DeviQA, we use AI to make testing smarter and simpler. Our ecosystem is built to deliver faster, smarter, and more cost-efficient results — so your team can do more in less time.

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AI-powered IDE assistant

Reduces test script writing time

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QA companion

Provides suggestions for test optimization and addresses gaps

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Automated code review

Flags unused variables, improper loops, and other common errors

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AI for API testing in Postman

Streamlines API test case creation and response validation

Features

Test case creation

Code review

Exploratory planning

Log analysis

without AI

6 hrs

3 hrs

2 hrs

2 hrs

with DeviQA AI

4 hrs (33% saved)

2 hrs (33% saved)

45 min (60% saved)

1 hr (50% saved)

Collaboration on your terms

Backed by 15+ years of expertise, DeviQA offers three flexible models for functional testing services to fit your project’s needs, timeline, and budget.

Staff augmentation

Expand your team with our skilled functional testers while you manage the project.

Advantages:

  • Fast onboarding of skilled professionals

  • Flexible scaling of resources

  • Full control over processes and priorities

Best for:

When you need extra hands for short-term tasks or specific expertise to meet deadlines.

Get started

Dedicated QA team

Get a dedicated team of functional testing experts integrated with your workflow, like an in-house team minus the overhead.

Advantages:

  • Full focus on your project

  • Scalable team size based on your needs

  • Seamless communication and collaboration

Best for:

Long-term projects or when you need consistent expertise and complete control.

Get started

Project-based outsourcing

Hand over your testing requirements to us, and we’ll handle the entire process from planning to execution.

Advantages:

  • End-to-end functional testing management

  • Predictable timelines and costs

  • No need to allocate internal resources

Best for:

When you want expert testing without the need for in-house management.

Get started

Why choose us as your functional testing service provider?

Over 600,000 project man-days successfully delivered.

We take full accountability for our work.

A range of value-added services at no extra cost.

Free test trial. Try us before making any payment.

Our engineers are senior QA professionals with strong autonomy and self-starting ability.

With a 96% retention rate, we offer stable teams, compared to the industry average of 80%.

Extensive testing lab with a wide range of environments, platforms, and devices.

Access to a technology community of over 1000 QA engineers and experts.

Book a call to ensure software works the way you imagined

Our approach to functional
testing services

As a functional testing service provider, we ensure your solution meets the highest standards of performance, reliability, and security with our structured testing approach.

01

Requirement analysis

We start by understanding your business goals and technical requirements, ensuring alignment with your vision and needs.

02

Test planning

Based on the analysis, we create a detailed test plan that outlines test scenarios, timelines, and the necessary resources for effective testing.

03

Test case design

Our team designs precise test cases that cover all functional aspects of your software, ensuring comprehensive coverage.

04

Test execution

We execute the tests, monitoring each step closely, and identify any deviations from the expected behavior of the system.

05

Defect reporting & tracking

Any issues found are logged with clear, actionable reports, and we track their resolution throughout the process to ensure timely fixes.

06

Final validation & sign-off

Once testing is complete, we perform a final validation to ensure everything functions as expected, then provide a sign-off, confirming readiness for release.

Here’s what people are saying
about DeviQA

26 reviews

32 reviews

9 reviews

Review

It was so easy to integrate your people with us and we didn't have any problems.

Author

Janosch Greber

VP of engineering at RealTyme

DeviQA helped develop a cybersecurity software platform. Complex automated scenarios test REST APIs through a Faraday library. An SDK application works with Azure, Google Cloud, Docker, and LXC containers.

Yuval Or

Yuval Or

QA manager at Mimecast

Review

DeviQA has always brought us really high quality candidates for us to be able to seamlessly mesh into our team.

Author

Danny He

CEO and founder at Soapbox

DeviQA provides software QA automation engineering support to a QC and QA company. Their work includes sandbox testing, QA, testing automation, DevOps support, and TechOps support.

Alex Ohoussou

Alex Ohoussou

Head of QA & techOPs at QIMA

Review

You guys have always been genuine, flexible and personable.

Author

Ryan Austin

CEO and founder at Cognota

DeviQA has provided application testing services for an HR tech company. The team has managed feature, smoke, and regression automation tests and offered test reports.

Mia Bunjac

Mia Bunjac

QA chapter lead at Renhead Technology

Review

In fact, they have been a part of our success story, helping us grow from six workers 11 years ago to about 1200 workers now.

Author

Raanan Tauber

QA manager at Tipalti

DeviQA provides automatic testing with continuous integration for native and hybrid mobile apps.

Giurea Renato Gabriel P.F.A.

Giurea Renato Gabriel P.F.A.

CTO at Impaktsoft Projekt S.R.L.

Review

They can take my lack of knowledge and I can trust that they will be able to produce something of value.

Author

Ray Alde

Co-founder & cto at Arklign

DeviQA provides QA and testing resources on an ongoing basis. They evaluate architectures and offer both manual and automated testing. The client has also utilized their on-demand developers.

Review

To me, that's above and beyond, I did not expect that to be so smooth and so easy.

Author

Mark Levine

Chief product officer at CYDEF

DeviQA is a dedicated vendor that assists with manual and automated testing on an ongoing basis. They're also overseeing other development projects and supervising the testing portion of those.

Review

They know what they're doing because the people that they send to us are quality people.

Author

Charles Chase

Chief technology officer at Returnmates

DeviQA provided application testing services for an audio editing platform. The team was responsible for continuously testing the UI and functionality of the platform via an automated testing framework.

Review

There is also very good follow up on the engineers and the job they're doing.

Author

Olivier Mayot

Chief technology officer at SimpliField

DeviQA serves as the process improvement partner to a diabetes care and solutions company. They helped scale the client's automated testing and are now working on improving their manual testing framework.

Collaboration process overview

  • 01

    Initial contact. We start by understanding your testing needs and aligning them with your goals.

  • 02

    Assessment. Our experts analyze your current process and propose a tailored improvement plan.

  • 03

    PoC. Try a free proof of concept to see our capabilities in action.

  • 04

    Trial & evaluation. We conduct a trial phase and review the results together.

  • 05

    Contract & QA implementation. Once satisfied, we sign the contract and begin full-scale QA.

  • 06

    Flexible partnership. DeviQA offers scalable solutions to adapt to your business needs.

Ready to connect?

Just fill in your name and email, and we’ll get back to you with available slots

Questions & answers

Functional testing services validate that software features work as expected based on business requirements, covering all user-facing and backend functions.
Yes. We provide automated testing using tools like Selenium, Cypress, and Playwright to accelerate regression cycles and improve test coverage.
Functional testing checks whether features work as intended. Non-functional testing evaluates performance, usability, and security aspects of the application.
We test web applications, native and hybrid mobile apps (iOS/Android), and desktop platforms to ensure functional accuracy across all environments.
Our QA engineers execute detailed test cases manually, replicating real user scenarios to verify UI behavior, form inputs, user flows, and integrations.
Yes. Our functional testing as a service model offers scalable, on-demand QA support with flexible engagement options tailored to your release roadmap.
Absolutely. We integrate functional tests into your CI/CD workflows for continuous validation on each code commit or deployment.
DeviQA combines deep QA expertise, robust automation frameworks, and scalable delivery models to ensure fast, reliable, and cost-effective functional testing.