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Top Software Testing Companies in USA 2021

by Stephen R.
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Looking for a Top Software Testing Company?

Are you looking for a software testing company? Check DataFlareup list of top software testing companies to find a reliable name in the testing industry. 

In an increasingly digital world, hiring a software testing company is a great way to improve your service.

That’s why we’ve created this list of the best software testing companies for you to review.

List of 20 Most Promising Best Software Testing Companies USA

  • Indium Software
  • Devstringx Technologies
  • QA Mentor
  • TestingXperts
  • ScienceSoft
  • QualityLogic
  • TestFort
  • Apphawks
  • Mindful QA
  • A1QA
  • QASource
  • TestMatick
  • A3logics
  • Kualitatem
  • Thinksys
  • Cigniti
  • Oxagile
  • XBOSoft
  • QA Madness

Indium Software

Indium Software

Indium Software is a global leader in QA testing services with over 2 decades of experience. They offer a wide range of software testing services for next-gen AI/ML applications. The company has proven experience and expertise working with SMEs, large-scale enterprises, and Fortune 500 clients over the last 20 years.

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Indium has been serving clients across several industries including Banking, Technology, Healthcare, Life sciences, Retail, and Education through flexible and scalable delivery models. Indium’s IP led automation framework iSAFE, helps customers in fulfilling their test automation needs.

Devstringx Technologies

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Devstringx Technologies is an all-round independent software testing company founded in 2014. Devstringx is well known for quality software and tech related services. From the day of foundation the company has achieved various significant milestones in the respective field. And now the company is moving forward to add on other new and useful values to the industry.

The services of Devstringx Technologies include all the Software Solutions like Software Development, Web Development, Software Testing and Test Automation. Apart from these services, you can choose Devstringx Technologies for other IT related services as well like Product Development. They provide you with genuine and top quality services with magnificent outcomes.

Devstringx Technologies was previously confined to the National Level only. However, later with the constant trust of the customers and success, Devstringx has now become a multinational company executing in different locations around the globe including USA, and India. With globalisation of Devstringx, the company could become able to serve hundreds of global customers with a team of 100+ employees in different countries.

Devstringx has a huge team of dedicated and honest employees. They work dedicatedly and find innovative solutions to the requirements of clients. They execute creatively to provide 100% satisfaction to the expectations of clients. A strong cluster of hard working employees is the true support to the success of the company.

QA Mentor

QA Mentor

Founded in 2010 and based in New York, QA Mentor, Inc. is a multi-award winning, CMMI Level 3 SVC + SSD v1.3 appraised ISO 27001:2013, ISO 9001:2015 and ISO 20000-1 certified leading independent software testing company offering manual test design and execution services.

With 312 global QA resources in 8 different countries (US, UK, Ukraine, India, France, Romania, Tunisia, Thailand) offering more than 30 QA Testing Services (Functional, Compatibility, Mobile, Usability, API, Automation, Performance, Security) and covering all time zones (5 shifts operations including weekend), QA Mentor is a global leader in Software Quality Assurance and Testing space.

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Serving 427 clients from Fortune 500 to startups in 28 countries, QA Mentor supports applications in 9 different industries. 

With unique products propositions from a crowdsourcing platform with a pool of 12,000 crowdsourced testers from 182 countries to our own test management platform – QACoverage and metrics platform QAMometor, unique and economical services offerings and QA education from e-learning and corporate training, QA Mentor continues its growth, expansion and footprint around the globe.



TestingXperts (Tx) is a QA & software testing services provider headquartered in London with test labs across the US, Europe, and offshore test labs in India. TestingXperts’ comprehensive suite of testing services covers Test Advisory, Functional and Non-Functional testing specializing in Automation, Digital, DevOps, Agile, Web, Mobility, AI/ML, RPA, Blockchain, IoT, and Big Data.

TestingXperts is a next-generation specialist QA and independent software testing company that provides testing services globally. They use innovative techniques to push the conventional norms of QA and use technology to yield remarkable deliverables. It is an ISO 9001:2015 & ISO 27001:2013 certified company. TestingXperts have a holistic knowledge of core business processes, and they have a comprehensive suite of testing services to cover both functional and non-functional testing, professional expertise for cloud and mobile applications. 


ScienceSoft is a leading software testing and QA services vendor headquartered in McKinney, US. ScienceSoft is an ISO 13485-certified company with a mature testing process compliant with ISO 9001:2015 and respect to test artifacts required by IEEE 829-2008. The company’s professional team, which includes ISTQB-certified test engineers, is proficient in testing functional and non-functional (performance, usability, compatibility, security) aspects of software for 10+ industries.


  • Top 50 Software Testing Companies by The Manifest.
  • Top Software Testing Companies to Work with in 2020 by Kualitatem.
  • Top US Software Testing Companies 2020 by Readdive.
  • Top Test Automation Companies 2019 by Viral Rang.

Experts In: QA outsourcing, managed testing, test automation, QA consulting, quality assessment.



Headquartered in Boise, Idaho, USA, QualityLogic is a Software QA testing company providing a full suite of QA testing services as well as website accessibility compliance. The company has successfully completed 5,000+ projects since opening their doors in 1986. QualityLogic recognizes the importance of integrating software testing services into the development process from concept to release. Clutch named QualityLogic a top 10 software application testing provider in their annual Global Leaders List. Leaders in this category were chosen based on the ability to deliver, industry expertise, and customer reviews.

QualityLogic’s singular passion is helping clients release great, high-quality software — and they have the expertise and experience to make that happen.

They’ve been in the QA business since 1986 and have perfected their testing process, so companies can rest assured they’re making the right decision when choosing QualityLogic as their software & QA testing company.


TestFort is a subdivision of a software development company that has grown into a team of 100+ skilled QA engineers with expertise in manual and automated testing for web, mobile, cloud and cross-platform software solutions. They have a dedicated QA team that brings innovative solutions for making the most of a QA process. 



It is an independent software testing company that has a wide array of QA services to offer to its customers. Whether you need a tester for your upcoming QA project, or need complete development and testing services, Apphawks is a good option when you are looking to outsource your QA process. 



A1QA is a software testing company that has been in service for more than 15 years. The company has locations in Colorado (US), London (UK), Lelystad (NL), and Minsk (BY), and considers itself a technology company, specializing in the delivery of full-cycle QA and application testing services.

Using the best skills and knowledge, A1QA renders a package of innovative QA and testing services to its global clients.

The aforementioned companies are some of the finest Software testing companies located in the USA. So, choose wisely and get your product the well-deserved QA and testing. 



QASource is a leading software engineering and QA testing services company. With a team of over 800 engineering experts located in both offshore and nearshore locations, it has been providing software testing services to help Fortune 500 companies and startups since 2002. QASource helps organizations develop modular, portable, maintainable, and reusable automation frameworks.



TestMatick offers a wide range of QA services and has worked in multiple industry verticals including banking and finance, e-commerce, education, healthcare, travel, aviation, etc. They have a team equipped with technical skills, proper understanding of business processes, specific industry knowledge and professional experience in building testing processes.



A3logics is a global IT services, consulting and business solutions company delivering best-in-class services and helping worldwide companies to drive business efficiencies. The organization is known as a Software Center of Excellence and has set a benchmark for quality services and solutions.

We combine our passion for perfection with expert technology ideas to achieve maximum client satisfaction, technology innovation, and enhanced time-to-market capabilities. We have a dedicated team of high-quality professionals who constantly work with diverse industrial players of varied domains like Employee Benefits, Healthcare, E-commerce, IoT, Big Data, IT Consulting services, Custom Software Development, and many more.


Kualitatem is an Agile-based company that is all about providing independent QA services and infoSec auditing services for more than 10 years. The globally renowned company has broken barriers in the tech arena and created super development models for mega corporates and enterprises. The independent IT firm takes pride in solving hundreds of thousands of software testing problems and ending up with a user-perfect product.

Their expertise lies in software testing, automation testing, mobile app testing, performance testing, functional testing, security testing, and much more at their client service.

They preach quality just like a Holy Agenda!


ThinkSys Inc

With a technical team of over 150 professionals, Thinksys is providing QA services as well as other software solutions such as software development, big data analytics, cloud computing, artificial intelligence, etc. Thinksys is still a relatively new company in the industry with 5 years of experience. Yet, it has proven to be a major player by catering to the requirements of businesses of all sizes.


Cigniti Technologies

Cigniti is a quality engineering & software testing services company, offering independent quality engineering and a wide range of software testing services for enterprises and ISVs. Cigniti has locations worldwide and a Testing Center of Excellence, world-class software testing Labs that deliver Quality Engineering, Quality Assurance, and Digital Assurance.


Oxagile applies its cutting-edge technology to support digital transformation for SMEs and global corporations. With 14 years of experience in software development services, its automation testing services ensure faster time to market, increase cost savings and rules out human error. Oxagile works on a framework that brings together of industry-standard tools, automation best practices, and reporting. It also allows quick and seamless integration into business workflows and delivers fast results. 


XBOSoft logo

XBOSoft is a to-rated QA testing company that specializes in providing comprehensive QA strategies to help clients meet their in-house needs. They have deep expertise, innovative frameworks and can help find the right fit for Agile businesses. XBOSoft provides QA services for pharmacy software companies, by utilizing automated regression testing before the software apps are released to their actual customers. 

QA Madness

QA Madness logo. Outsource QA company.

QA Madness is a leading QA company that provides QA testing services to various business verticals. Their team uses state-of-the-art software testing tools to ensure developing innovative products. They utilize both manual and automated testing to provide a wide range of QA services to meet business requirements.


Better QA

BetterQA is a software testing services company founded in 2018 and located in Cluj-Napoca, Romania. The team of fewer than 50 employees offers application testing services to mostly midmarket businesses in the IT industry.


BetterQA led QA efforts, working on a software development company’s system. Their work involved analyzing and demoing existing features, and they established a testing system. The team contributed to the success of the testing processes. 

“They were proactive in defining with us the goals and tasks of this module.” – CTO, Software Development Company


QAlified Logo

QAlified is a software testing and quality assurance company based in Montevideo, Uruguay, with an office in Santa Rosa, Calif. The company, founded in 1992, has a team of more than ten that provides application testing services. QAlified serves mid-market and other-sized companies and institutions in various industries that include financial services, government, and IT.

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