Are you searching for the best performance testing service providers? Ensure your software application can effectively handle anticipated workloads consistently over time, it's a best way to hire a reliable performance testing companies. 

Application performance is of utmost importance in user satisfaction and, consequently, brand reputation. Any performance problem in the production environment would really tarnish credibility and trust to an unacceptable degree; thus, this application ought to be set free from performance issues. Performance testing is conducted alongside other aspects of software testing to ensure that a system meets reliability and scalability requirements under specified conditions; helping performance testing companies is a practical approach to achieving this certainty.

 

List of Performance Testing Companies

Here is a detailed list of some of the best performance testing companies and service providers globally, including firms from USA and around the world that offer cost-effective and innovative performance testing and quality assurance services.

#1. A1QA

A1QA has been delivering independent software QA and testing services across industries for over 17 years, serving more than 500 clients worldwide, including Fortune 500 companies.

  • Clients: Adidas, Telekom Austria Group, Kaspersky, Kano, InnoGames, Pearson, AP, Acronis
  • Years in Industry: 17 years
  • Team Size: 800 QA engineers and testers
  • Completed Projects: 1500+
  • Locations: United States, United Kingdom

 

#2. Devstringx Technologies

Devstringx Technologies is a global independent software testing company in the USA. They have extensive experience working across domains such as hospitality, IT, healthcare, logistics, and e-commerce. Their service offerings include test automation, functional testing, performance testing, compatibility testing, usability testing, and more.

  • Services: Test automation, software testing, software development, mobile app development, web application development, e-commerce development
  • Clients: Joybird, Kwiat, QBS Learning, OpenDoctor, SwiftLogic, Ambisafe
  • Founded: 2014
  • Completed Projects: 250+
  • Team Size: 50–249 employees
  • Locations: Lewes

 

#3. ScienceSoft

ScienceSoft is an international vendor providing testing and quality assurance for software to ensure faultless performance of any software, including cutting-edge technologies in IoT, blockchain, AI, and big data to be done by ISTQB-certified testers.

They undertake performance testing using reputable tools like Apache JMeter, LoadRunner, Gatling, and Locust. ScienceSoft offers reusable performance test scripts, detailed reports on testing results, root cause analysis of performance bottlenecks, and recommendations on how to resolve them. Their performance testing quality has been certified with ISO 9001.

  • Services: Load testing, stress testing, stability testing, scalability testing
  • Clients: IBM, NASA JPL, Deloitte, Nestle, Walmart, eBay, Auchan, Rakuten Viber, and more
  • Years in Industry: 33 years
  • Team Size: 700+ IT professionals
  • Completed Projects: 3000+
  • Locations: United States (HQ), EU, UAE

 

#4. QA Genesis

QA Genesis leads the performance testing community in identifying and helping companies with application performance bottlenecks. These engineers have been able to uncover hidden issues with anything from slow API responses, bad database queries, to CPU-intensive processes affecting user experience or business processes. 

They conduct performance testing and load testing using JMeter, LoadRunner, or any other tools to support scalability and reliability. The accuracy with which QA Genesis works cannot be complimented enough, and its customer-centric approach means they ensure your applications are tuned and capacity planned for the future. 

Over the years, QA Genesis has carved a reputation from its own angle as providers of very efficient performance testing services to the global clientele.

  • Services: Performance and load testing, automated testing, manual testing, agile testing, DevOps
  • Clients: Startups, mid-sized companies, and enterprises across industries
  • Founded: 2014
  • Completed Projects: 150+
  • Team Size: 50–200 employees
  • Location: USA

 

#5. DeviQA

DeviQA is a software testing company that offers performance testing services alongside a wide range of QA solutions. They provide a free proof of concept and maintain effective communication regardless of client location or time zone. DeviQA was a finalist in the Software Testing Award under the “Best Test Automation Project – Functional” category.

  • Clients: WeHeartIt, Tipalti, MimeCast, Cipher, Contactually, Connexient, Sprinklr, and others
  • Years in Industry: 10+ years
  • Team Size: 100+ engineers
  • Completed Projects: 500+ tested applications
  • Location: Ukraine, United States

 

#6. QualityLogic

With over 30 years in the QA industry, QualityLogic is a US-based software testing company offering comprehensive QA services. Their offerings include QA assessments, planning, test architecture, tool development, test automation, functional testing, performance testing, compatibility testing, interoperability, and usability testing. All their QA operations are conducted onshore in the USA.

  • Clients: Cisco, HP, Open ADR Alliance, eHarmony, Adobe, AT&T, and more
  • Years in Industry: 30+ years
  • Team Size: 100+ employees
  • Location: USA (Pacific Northwest, Southern California, Midwest)

 

#7. TestMatick

TestMatick provides automation testing services for web and mobile applications, supporting continuous integration setups. Their team configures environments to automatically integrate all project components and execute tests whenever new code commits are made, ensuring quick and efficient testing cycles.

  • Clients: Hubrick, SubscribePro, Negotiation Experts, Dahmakan, Improbable, Veracloud, Media Spectrum, Samanage, and others
  • Years in Industry: 10+ years
  • Team Size: 125 testers
  • Sites Tested: 945+
  • Mobile Apps Tested: 219+
  • Locations: USA, Ukraine, Cyprus

 

#8. Galaxy Weblinks Inc.

Galaxy Weblinks Inc. is an independent software testing company offering extensive QA services, including performance testing for web and mobile applications. Their services cover load testing, UX-based performance testing, and automated performance testing aligned with agile methodologies. Their dedicated QA team effectively resolves critical issues related to browser compatibility, security, and overall functionality.

  • Clients: NetGear, Staples, Tivo, Dow Jones, PTC University, and more
  • Years in Industry: 20+ years
  • Team Size: 250+ employees
  • Locations: United States, Australia

 

#9. QA Source

QA Source delivers high-quality QA outsourcing services using a distributed Agile model that combines offshore and nearshore technical talent with US-based management and QA engineers. This approach enables them to provide efficient, scalable, and cost-effective performance testing services to their clients.

  • Clients: eBay, IBM, TechSmith, Oracle, Facebook, Looksmart, Dartmouth, and others
  • Years in Industry: 18+ years
  • Team Size: 900+ employees
  • Location: United States

 

#10. TestingXperts

TestingXperts is an advanced-generation expert QA and software testing company and a part of the Damco Group, which is one of the leading IT solutions and services companies. Certified under ISO 9001:2015 and ISO 27001:2013, TestingXperts was ranked as a leader in the NelsonHall NEAT Chart 2019. It partners with several Fortune enterprises across the globe and delivers thumping testing services.

  • Clients: AMD, Kotak Mahindra Bank, CMIS Group, HP, BrowserStack, FoodPanda, Thomson Reuters, and others
  • Years in Industry: 24+ years
  • Team Size: 1000+ employees
  • Completed Projects: 400+
  • Locations: USA, UK, Netherlands, Australia, Canada

 

#11. ImpactQA

ImpactQA is a chief QA consulting and software testing company having ISO 9001: 2008 and ISO 27001 certification. Based in New York, it has branches in New Delhi, Munich, Dallas, and London. It has a strong clientele of more than 250, ranging from startups to Fortune 500 companies. Currently, the company's services span the complete development lifecycle with manual and automated testing of all types.

  • Clients: Amdocs, Rocket Internet, Schneider, Panasonic, Deloitte, National Geographic Channel, and more
  • Team Size: 250+ employees
  • Completed Projects: 250+
  • Locations: United States, UK, Germany

 

#12. QAwerk

QAwerk is a software testing consultancy and QA outsourcing company that has been providing its clients worldwide with high-standard testing services. QAwerk offers a complete package of QA services across Australia, Canada, UK, Ireland, USA and many other locations, keeping their product reliable and bug-free.

  • Clients: Elsewhen, Unfold, Station, Loaded Reports, and others
  • Years in Industry: 5+ years
  • Team Size: 30+ software testers
  • Completed Projects: 300+
  • Locations: USA, Germany, Ukraine

 

#13. QA Mentor

QA Mentor operates globally with 12 testing operations all across the U.S., U.K., France, Romania, Ukraine, India, Tunisia, and Thailand. Founded in 2010 and with its base in New York, QA Mentor is an award-winning, CMMI Level 3 appraised, and ISO-certified independent software testing company.

  • Clients: HTC, Bosch, eBay, Amazon, HSBC, Citi Bank, ZYTO, Afex, Sodexo, and more
  • Years in Industry: 10+ years
  • Team Size: 300 certified QA professionals
  • Completed Projects: 876+
  • Locations: United States, India

 

#14. QualiTest Group

QualiTest Group specialises exclusively in software testing and quality assurance services. They design and deliver solutions leveraging deep industry knowledge combined with advanced testing technologies to meet diverse client needs.

  • Clients: Philips, Microsoft, Intel, Google, GE, Johnson & Johnson, and others
  • Years in Industry: 13+ years
  • Team Size: 1000+ employees
  • Locations: United States, UK, Israel

 

#15. Mindful QA

Mindful QA is an American QA testing company providing manual and automated testing services for websites and apps without requiring long-term contracts. Their team is known for delivering thoughtful testing approaches with reliable results.

  • Clients: Google, Clorox, Microsoft, Intel, H&R Block, and others
  • Location: United States
Ankur Shrivastav
Ankur Shrivastav
CEO
Ankur is a seasoned entrepreneur with more than a decade of experience in developing successful web and app products for startups, small and medium enterprises, and large corporations. He is passionate about technology leadership and building robust engineering teams.
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