Functional testing plays a crucial role in delivering high-quality software products. In the USA, numerous companies specialize in providing exceptional functional testing services. Whether you need web, mobile, or enterprise application testing, choosing the right partner ensures your software meets all requirements and performs flawlessly. Let’s explore some of the top functional testing companies in the USA trusted by businesses across industries.
1. A-listware
At A-listware, we focus on delivering software development and consulting services with a strong emphasis on functional testing. Our experience spans a wide range of industries, where we help companies maintain the quality and performance of their digital products. We provide services in software development, testing and QA, IT consulting, application services, and more.
Our approach ensures that functional testing is integrated into every stage of the software development lifecycle. We verify that systems work as intended and meet specified requirements, helping clients reduce errors and improve user experience. With access to a broad pool of IT professionals, we form and manage teams that handle a range of functional testing tasks, including web, mobile, and enterprise applications.
By offering round-the-clock access to experts, seamless integration with client teams, and reliable support, we align our services to meet various operational needs. Functional testing services are a key part of our work, ensuring that software products are both reliable and scalable before they reach end users.
Key Highlights:
- Focus on functional testing for web, mobile, and enterprise applications
- Experience working with enterprises, small businesses, and startups
- Broad technical expertise across multiple platforms and technologies
- Extensive candidate pool to build custom testing teams
- End-to-end software development and QA lifecycle management
Services:
- Functional Testing
- Software Development
- Application Services
- UX/UI Design
- IT Consulting
- Dedicated Development Teams
- Data Analytics
- Infrastructure Services
- Help Desk Services
- Cybersecurity Services
Contact Information:
- Website: a-listware.com
- Address: North Bergen, NJ 07047, USA
- Phone: +1 (888) 337 93 73
- Email: info@a-listware.com
- Facebook: www.facebook.com/alistware
- LinkedIn: www.linkedin.com/company/a-listware
2. QASource
QASource provides software testing services with a focus on functional testing to organizations in the USA and globally. They offer dedicated testing teams that work closely with client engineering teams, ensuring high-quality software delivery across different industries, including finance, healthcare, and SaaS. Their services integrate generative AI with human expertise to automate testing processes, aiming to enhance accuracy and coverage. Functional testing is a key part of their service lineup, helping organizations validate that software applications perform according to specifications and meet business needs.
Their approach emphasizes collaboration, embedding their engineers within client teams for seamless integration. QASource supports a wide range of commercial and custom testing tools and adjusts quickly to project demands. Their expertise spans manual and automated functional testing for web, mobile, and enterprise applications. They maintain on-demand testing capacity to meet scaling needs without long onboarding periods.
Key Highlights:
- Focus on functional testing for web, mobile, and enterprise systems
- Integration of AI technologies in test automation
- Collaboration with client teams for seamless project execution
- On-demand testing capacity with quick scalability
- Experience across multiple industries including fintech, healthcare, and SaaS
- Support for a variety of testing tools and frameworks
- Offshore and nearshore offices to support global clients
Services:
- Functional Testing
- Test Automation Services
- API Testing
- Mobile App Testing
- Security Testing
- Salesforce Testing
- Blockchain Testing
Contact:
- Website: www.qasource.com
- Address: 73 Ray St, Pleasanton, CA 94566
- Phone: +1.925.271.5555
- Email: info@qasource.com
- Facebook: www.facebook.com/qasource
- LinkedIn: www.linkedin.com/company/qasource
- Twitter: x.com/qasource
3. DeviQA
DeviQA specializes in providing quality assurance and software testing services, with a strong emphasis on functional testing. They assist companies of various sizes by offering outsourcing, consulting, and managed testing services. Their teams work to verify that software systems meet functional requirements and perform as expected in real-world conditions. DeviQA integrates AI solutions into their testing practices, aiming to improve efficiency and reduce manual testing effort.
They offer services such as QA outsourcing, team augmentation, and managed testing, supporting a broad range of industries. Their flexible cooperation models allow clients to scale resources based on project needs. DeviQA’s functional testing services cover mobile, web, and desktop applications, helping organizations ensure reliability and performance before product launch.
Key Highlights:
- Emphasis on functional testing services for different platforms
- Flexible cooperation models including outsourcing and team augmentation
- Integration of AI tools to enhance testing processes
- ISO certifications for quality and information security management
- QA services tailored to different business sizes and industries
- Managed remote QA departments available
- Experience in manual and automated testing
Services:
- Functional Testing
- QA Outsourcing
- QA Consulting
- Managed Testing Services
- Test Automation
- Remote QA Department Services
- Dedicated QA Teams
Contact:
- Website: www.deviqa.com
- Address: 71 Stevenson Street, San Francisco
- Facebook: www.facebook.com/deviQASolutions
- LinkedIn: www.linkedin.com/company/deviqa
4. QualityLogic
QualityLogic provides software testing and QA services, with a focus on functional testing to support clients in various industries. Their services are designed to integrate with client teams, offering customized testing solutions that validate the functionality of software applications. QualityLogic supports both onshore and hybrid testing models to meet client requirements efficiently. They have a long history of providing QA services, particularly emphasizing functional testing to help ensure software products perform reliably under expected conditions.
Their service portfolio includes manual testing, automated testing, accessibility testing, and performance testing. QualityLogic focuses on seamless integration with development teams, offering flexible processes to support agile and lean environments. Their functional testing services are built to identify defects early and reduce risks, contributing to higher software quality.
Key Highlights:
- Specialization in functional testing across different industries
- Onshore and hybrid service models
- Integration with agile and lean development processes
- Manual and automated testing expertise
- Support for accessibility and smart energy testing
- Services tailored to specific business needs
Services:
- Functional Testing
- Manual Testing
- Test Automation
- Load and Performance Testing
- Accessibility Testing
- Regression Testing
- Usability Testing
Contact:
- Website: www.qualitylogic.com
- Address: 9576 West Emerald St, Suite 100, Boise, ID 83704
- Phone: 2084241905
- Email: info@qualitylogic.com
- Facebook: www.facebook.com/QualityLogic
- LinkedIn: www.linkedin.com/company/qualitylogic
- Twitter: x.com/QualityLogic
5. ImpactQA
ImpactQA provides software testing and quality assurance services with a focus on functional testing for businesses across industries. Their approach combines traditional testing methodologies with AI-driven automation to support digital transformation initiatives. Functional testing is a core offering, aimed at verifying that applications meet specified requirements and deliver consistent performance.
Their services cover a broad range of industries including healthcare, BFSI, retail, and travel. ImpactQA’s functional testing services ensure that both web and mobile applications operate as expected before launch. The company offers flexible testing models and integrates seamlessly with client teams to support various development cycles and quality needs.
Key Highlights:
- Focus on functional testing for enterprise and consumer applications
- Integration of AI-driven automated testing processes
- Experience serving multiple industries including healthcare and retail
- More than a decade of experience in software testing
- Emphasis on combining manual and automated testing approaches
- Supports both web and mobile testing needs
Services:
- Functional Testing
- Automation Testing
- Mobile App Testing
- Security Testing
- IoT Testing
- Performance Testing
Contact:
- Website: www.impactqa.com
- Address: 12650 Crossroads Park Dr, Suite 100, Houston, Texas, 77065
- Phone: +1 (347) 268-6188
- E-mail: solutions@impactqa.com
- LinkedIn: www.linkedin.com/company/impactqa-software-testing-services
- Twitter: x.com/Impact_QA
- Facebook: www.facebook.com/ImpactQA
- Instagram: www.instagram.com/impactqa
6. Cigniti
Cigniti, now a Coforge company, specializes in digital assurance and engineering services with a strong emphasis on functional testing. They work with organizations across industries such as healthcare, banking, and retail to improve software quality and accelerate digital transformation. Functional testing forms a significant part of their services, helping to validate that software systems behave as expected under a variety of conditions. Cigniti combines AI-led techniques with traditional testing strategies to ensure comprehensive test coverage.
Their services span from accessibility testing to performance and security testing, supporting the entire software development lifecycle. They maintain a global delivery model and work closely with clients to customize functional testing solutions that align with specific business requirements. The company also focuses on enhancing testing efficiency through the use of intelligent automation and analytics.
Key Highlights:
- Focus on functional testing across industries including healthcare and finance
- AI and automation integrated into the testing process
- Enterprise and digital transformation initiatives
- Wide range of testing services including mobile and cloud applications
- Global delivery capabilities
- Emphasis on quality-first approach in digital assurance
Services:
- Functional Testing
- Performance Testing
- Test Automation
- Mobile App Testing
- Security Testing
- Regression Testing
- Accessibility Testing
Contact:
- Website: www.cigniti.com
- Address: 433 E Las Colinas Blvd, Suite 1300, Irving, TX 75039
- Phone: +1 469 673 3443
- Facebook: www.facebook.com/cignititechnologies
- LinkedIn: www.linkedin.com/company/cigniti-inc
7. Qualitest
Qualitest provides software testing and quality engineering services with a focus on functional testing across multiple industries. They support clients in ensuring that their digital products operate as intended by combining AI-led quality assurance with traditional methodologies. Their functional testing services are designed to verify that software meets defined requirements and delivers a consistent user experience. Qualitest integrates into client processes to deliver scalable testing solutions that align with the pace and demands of digital transformation projects.
Their portfolio covers industries such as healthcare, retail, manufacturing, and banking. The company offers services including quality assurance, digital engineering, and managed testing services. Functional testing is a key element of their approach, helping clients reduce defects and optimize software performance before release. They also utilize AI-powered tools to streamline and enhance the testing process.
Key Highlights:
- Focus on functional testing across industries like healthcare and retail
- AI-powered quality assurance integration
- Support for digital transformation initiatives
- Global delivery models and flexible engagement options
- Services covering both manual and automated testing
- Emphasis on quality orchestration and continuous improvement
Services:
- Functional Testing
- Test Automation
- Performance Testing
- Cybersecurity Testing
- Mobile App and Web Testing
- UX Testing
- Accessibility Testing
Contact:
- Website: www.qualitestgroup.com
- Address: 2350 Mission College Boulevard, Suite 365, Santa Clara, CA 95054, United States
- Phone: (312) 763-6693
- Facebook: www.facebook.com/Qualitestgroup
- LinkedIn: www.linkedin.com/company/qualitest
- Twitter: x.com/QualiTest
- Instagram: www.instagram.com/lifeatqualitest
8. TestingXperts
TestingXperts offers software testing and quality engineering services with a focus on functional testing for clients in the USA and globally. They provide digital assurance and engineering solutions by integrating AI technologies into their testing practices. Functional testing is a core part of their offerings, ensuring that software applications perform according to business requirements. Their approach emphasizes comprehensive testing throughout the product lifecycle to support faster releases and higher application quality.
They serve industries such as banking, healthcare, retail, and insurance, offering tailored solutions that align with client business goals. TestingXperts employs advanced tools and frameworks like Tx-Automate to optimize regression testing and improve overall testing efficiency. Their functional testing services are structured to detect defects early and deliver reliable software products.
Key Highlights:
- Focus on functional testing across industries like banking and healthcare
- Integration of AI-powered testing solutions
- Tailored quality assurance strategies based on business needs
- Use of proprietary testing accelerators for faster delivery
- Support for both web and mobile application testing
- Global delivery and hybrid engagement models
Services:
- Functional Testing
- Automation Testing
- Enterprise Application Testing
- AI-Powered Quality Engineering
- Data and Analytics Testing
- Digital Assurance Consulting
- Next-Gen Application Testing
Contact:
- Website: www.testingxperts.com
- Address: 650 Wilson Ln, Suite 201, Mechanicsburg, PA 17055
- Phone: +1 866 888 5353
- Facebook: www.facebook.com/testingxperts
- LinkedIn: www.linkedin.com/company/testingxperts
- Twitter: x.com/TestingXperts
9. QA Mentor
QA Mentor provides software testing and quality assurance services, emphasizing functional testing for businesses in the USA and worldwide. They combine offshore and onshore resources to offer flexible and scalable testing solutions across different industries. Functional testing services are designed to ensure software applications operate according to requirements, helping clients prevent critical issues before deployment. Their approach is structured around customizable processes that align with varied project needs.
They serve clients from startups to large enterprises, providing a wide range of services from functional testing to performance and security testing. QA Mentor supports multiple platforms including web and mobile applications and employs an on-demand service model that adapts to changing project demands. Their services cover the entire software lifecycle, delivering reliable outcomes with reduced risk.
Key Highlights:
- Focus on functional testing for web and mobile applications
- Combination of offshore and onshore testing teams
- On-demand testing services with flexible engagement models
- Support for diverse industries including finance and healthcare
- Extensive use of open-source and enterprise tools
- ISO and CMMI certified testing processes
Services:
- Functional Testing
- Mobile and Browser Compatibility Testing
- Automation Testing
- Load and Performance Testing
- Security and Penetration Testing
- Regression Testing
- Crowdsourcing Testing
Contact:
- Website: www.qamentor.com
- Address: 1441 Broadway, 3rd Floor, New York, NY 10018 USA
- Phone: 1-800-622-2602
- Email: support@qamentor.com
- Facebook: www.facebook.com/QAMENTOR1
- LinkedIn: www.linkedin.com/company/qa-mentor-inc-
- Twitter: x.com/QAMENTOR1
10. TestMatick
TestMatick offers software testing services with a strong focus on functional testing for businesses in the USA and internationally. Their services aim to ensure software products meet business and user requirements before release. Functional testing is a core part of their strategy, helping clients identify and fix issues early. They deliver testing services for mobile and web applications, using real-life conditions alongside lab environments to validate application behavior.
They support clients across various industries with a broad range of testing services including automation and performance testing. TestMatick employs flexible engagement models and rapid project initiation, often starting within a few hours. Their approach prioritizes transparency and responsiveness, providing end-to-end support from initial consultation to full deployment.
Key Highlights:
- Focus on functional testing for web and mobile applications
- Quick project initiation and flexible engagement terms
- Real-life condition testing for mobile applications
- Combination of manual and automated testing services
- Customizable testing processes with cost-quality balance
- Global service delivery model
Services:
- Functional Testing
- Mobile App Testing
- Web App Testing
- Automated Testing
- Performance Testing
- QA as a Service
Contact:
- Website: testmatick.com
- Address: 276 5th Ave Suite 704, New York, NY 10018
- Phone: +1 (212) 203-8264
- Email: contact@testmatick.com
- Facebook: www.facebook.com/testmatick
- LinkedIn: www.linkedin.com/company/testmatick
- Twitter: x.com/testmatick
- Instagram: www.instagram.com/testmatick.team
11. Testrig Technologies
Testrig Technologies provides software testing and quality assurance services with an emphasis on functional testing across industries. They focus on ensuring that applications meet specified requirements and function correctly under real-world conditions. Their services are structured to cover the full development cycle, with functional testing playing a central role in preventing defects and improving software quality. Testrig supports startups and enterprises with customized QA processes aligned to business objectives.
They offer services for industries such as healthcare, banking, and retail, covering both manual and automated functional testing. Testrig leverages a range of testing tools and methodologies including AI-driven approaches to enhance efficiency. Their engagement models are designed to be scalable and adaptable to the size and complexity of different projects.
Key Highlights:
- Emphasis on functional testing across various industries
- Combination of manual and automated testing
- Support for startups and enterprises with flexible engagement models
- Integration of AI-driven testing approaches
- End-to-end QA services from planning to execution
- Global delivery capabilities
Services:
- Functional Testing
- Mobile App Testing
- Web App Testing
- Automation Testing
- API Testing
- Performance Testing
- Security Testing
Contact:
- Website: www.testrigtechnologies.com
- Address: 539 W. Commerce #687, Dallas, TX 75208, USA
- Phone: +1 2147363267
- E-mail: info@testrigtechnologies.com
- LinkedIn: www.linkedin.com/company/testrig-technologies
- Twitter: x.com/testrig_qa
- Facebook: www.facebook.com/testrig
- Instagram: www.instagram.com/testrigtech
12. Mindful QA
Mindful QA provides functional testing services for websites, mobile apps, and software applications. Based in the USA, they offer on-demand testing that can be quickly integrated into a client’s workflow. Their functional testing approach includes cross-browser testing, user experience feedback, and support for a wide range of devices and platforms. Mindful QA works closely with development teams and adapts to different project needs without long setup times.
They offer flexible options for companies looking to ensure quality without committing to long-term contracts. Their services cover manual and automated testing, performance validation, and usability checks. Mindful QA emphasizes seamless collaboration with tools like Jira and Slack to streamline communication and testing processes.
Key Highlights:
- Focus on functional testing for web and mobile applications
- On-demand hourly testing services
- Integration with client project management tools
- Quick onboarding process
- Testing across hundreds of mobile devices
- US-based testing teams
Services:
- Functional Testing
- Website Testing
- Mobile App Testing
- Manual and Automated Testing
- Cross-browser Testing
- User Experience Feedback
Contact:
- Website: www.mindfulqa.com
- E-mail: contact@mindfulqa.com
13. Moolya
Moolya delivers functional testing services focused on enhancing product quality by integrating testing into the development and business processes. They adopt a holistic approach that emphasizes code quality, product understanding, and organizational culture. Moolya supports functional testing for web and mobile applications and works across industries like finance, healthcare, and retail.
Their teams combine development and testing skills to prevent bugs and ensure product stability. Moolya’s focus on scalability and team collaboration aims to align testing with customer needs. They provide a mix of manual and automation testing services, supporting clients through different stages of growth and product cycles.
Key Highlights:
- Holistic approach to functional testing
- Focus on product, code, and organizational culture
- Combines development and quality engineering
- Supports a variety of industries
- Emphasis on scalability and process improvement
- Hybrid teams of developers and testers
Services:
- Functional Testing
- Automation Testing
- Product Quality Consulting
- Code Quality Assurance
- Cultural Change Management
- Business Analysis in Testing
Contact:
- Website: moolya.com
- Address: 504 Sunnymount Ave Sunnyvale, CA 94087
- Phone: +1 408 329 9497
- E-mail: sales@moolya.com
- LinkedIn: www.linkedin.com/company/moolyatesting
- Twitter: x.com/moolyatesting
- Facebook: www.facebook.com/moolyatesting
- Instagram: www.instagram.com/moolyatesting
14. Global App Testing
Global App Testing provides functional testing services aimed at verifying software quality across multiple environments and geographies. Their services support enterprises in industries like payments, travel, and digital identity. They ensure software functions properly on diverse devices and networks.
They combine functional test case execution and exploratory testing to identify issues in different user environments. Global App Testing integrates with popular tools like Jira and TestRail, and their services help businesses improve release cycles and user experience through localized and accessibility-focused testing.
Key Highlights:
- Functional testing across various devices and environments
- Integration with CI/CD tools
- Focus on usability and accessibility testing
- Localized testing for global markets
- Support for large enterprises and growing businesses
Services:
- Functional Testing
- Usability Testing
- Localization Testing
- Accessibility Testing
- Compatibility Testing
- Exploratory Testing
Contact:
- Website: www.globalapptesting.com
- Phone: +1 (917) 970-9004
- E-mail: Info@globalapptesting.com
15. Rainforest QA
Rainforest QA offers functional testing services with an emphasis on automation through their AI-accelerated platform. They help businesses test web applications without requiring extensive coding knowledge. Rainforest QA provides dedicated test managers who create and maintain end-to-end tests, allowing development teams to release updates faster and with fewer defects.
Their testing services focus on replicating real user interactions by testing the visual layer of applications. Rainforest QA integrates with existing development pipelines and supports quick test execution with parallel running capabilities. Their services aim to reduce test maintenance through self-healing AI technology.
Key Highlights:
- AI-accelerated functional testing platform
- Dedicated test managers for client support
- No-code test creation and maintenance
- Testing based on the visual layer of applications
- Integration with CI/CD pipelines
- Parallel test execution for faster results
Services:
- Functional Testing
- Automated Testing
- Exploratory Testing
- Visual UI Testing
- Test Maintenance with AI
- QA Consulting
Contact:
- Website: www.rainforestqa.com
16. Testlio
Testlio provides functional testing services designed to support digital products across multiple industries. They focus on combining manual and automated testing, supported by an AI-powered platform and a global network of freelance testers. Their functional testing approach covers a wide range of devices, payment systems, and languages, helping businesses ensure software quality and improve release cycles. Testlio’s services are tailored to help companies reduce risk and enhance the reliability of their software applications.
Their offerings include manual testing, automation, and fused testing models that combine human expertise with machine-driven processes. Testlio integrates with client systems to maintain efficient workflows and provide real-time insights into product quality. They focus on scalability and flexibility, offering solutions that adjust to different project requirements and business needs.
Key Highlights:
- Combination of manual and automation testing
- Access to a global network of freelance testers
- AI-powered functional testing solutions
- Integration with client project management tools
- Coverage across devices, countries, and payment systems
- Focus on scalability and flexible testing models
Services:
- Functional Testing
- Manual Testing
- Test Automation
- Localization Testing
- Regression Testing
- Mobile and Web App Testing
Contact:
- Website: testlio.com
- Address: 8911 N Capital of Texas Hwy, Suite 4200 #1081, Austin, TX 78759, United States
- E-mail: Hi@testlio.com
- LinkedIn: www.linkedin.com/company/testlio
17. AlphaBOLD
AlphaBOLD provides technology consulting and software solutions with a focus on business process improvement and system integration. They offer services across ERP and CRM platforms, cloud services, AI automation, and custom development. Their approach combines functional knowledge with systems expertise, aiming to build solutions that adapt to an organization’s specific needs. Their offerings also extend to managed IT services and digital transformation consulting, supporting clients across different industries and regions.
Their quality assurance services are part of broader digital strategies, focusing on custom application development, integrations, and business optimizations. AlphaBOLD’s solutions help organizations align their technology investments with measurable business outcomes by providing support through software selection, project readiness, implementation, and post-deployment services. They maintain an emphasis on seamless integration, real-time data flow, and efficient technology adoption.
Key Highlights:
- Focus on ERP, CRM, and cloud platform integrations
- Expertise in Microsoft Dynamics 365 and NetSuite
- Support across AI automation and data analytics solutions
- Tailored digital transformation strategies
- Emphasis on real-time data connectivity and process automation
- Services designed for scalability and operational efficiency
Services:
- Functional Testing
- Quality Assurance
- ERP and CRM Implementation
- System Integration Services
- AI Automation and Data Analytics
- Custom Software Development
- Cloud Solutions and Managed IT Services
- Microsoft Consulting Services
Contact:
- Website: www.alphabold.com
- Address: 2011 Palomar Airport RD, Suite 305, Carlsbad, CA 92011, United States
- Phone: (909) 979-1425
- E-mail: info@alphabold.com
- LinkedIn: www.linkedin.com/company/alphabold
- Twitter: x.com/AlphaboldInc
- Facebook: www.facebook.com/alphabold
Conclusion
Functional testing companies in the USA play an important role in helping businesses deliver reliable and high-performing software products. By focusing on verifying that systems operate according to specified requirements, these companies support organizations across industries in reducing software defects and improving user satisfaction. Their services cover a wide range of areas, from web and mobile application testing to complex system integrations, ensuring that products meet business needs before reaching the market.
Choosing the right functional testing partner can contribute significantly to the success of a software project. Companies offering these services combine technical expertise, industry knowledge, and structured testing practices to help businesses manage quality and minimize risk. As digital transformation continues to evolve, the need for effective functional testing remains critical for companies seeking to maintain operational efficiency and meet customer expectations.
