Explore leading software testing companies that launch high-performing products, detect bugs early, improve stability, and ensure every feature works correctly across devices and environments. For teams focused on the US market, we also highlight trusted partners with region-specific expertise, including top US-based software testing companies.

Best Software Testing Firms

60 Companies-Rankings updated: November 03, 2026

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Health Care × $25,000 - $50,000 ×
  • Crema is a design consultancy that helps forward-thinking leaders discover, understand, and execute.

    Crema is a design consultancy that helps companies build the custom software they need to compete in todays market. Our product teams blend business strategy and technical expertise to create solutions for our clients most pressing needs...

    Top Services:

    • UI/UX Design
    • Software Development
    • AI Development
    • Software Testing
    • Mobile App Development
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    Location
    Kansas City, Missouri
    Number of Employees
    Under 49
    Average Hourly Rate
    $175/hr
    Minimal Budget
    $25,000 - $50,000
  • Lead the future

    We challenge the present with people-first User Experience Design and Agile Methodologies to harness technology for a better tomorrow...

    Top Services:

    • Software Development
    • UI/UX Design
    • Mobile App Development
    • eCommerce Development
    • Software Testing
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    Location
    New York City, New York
    Number of Employees
    100 - 249
    Average Hourly Rate
    $99/hr
    Minimal Budget
    $25,000 - $50,000
  • Boutique Engineering Studio

    EltexSoft is a boutique engineering studio of 35 to 50 senior developers, building web, mobile, and AI products for startups and established companies since 2015. We embed as a long-term extension of your team, the engineers who scope the work are the ones who ship it...

    Top Services:

    • eCommerce Development
    • AI Development
    • Web Development
    • Software Development
    • Mobile App Development
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    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $80/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    3 Projects Listed
  • Empowering your Business Need

    ZalaTech is a reliable Website Design & Development, Software Development, ERP Implementation Solution, Networking solutions and SEO service provider in Ethiopia. We provide custom web, software, multi-platform solutions for Enterprise and Startup companies in Ethiopia...

    Top Services:

    • Mobile App Development
    • Software Testing
    • Software Development
    • Digital Marketing
    • SEO
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    Location
    Addis Ababa, Ethiopia
    Number of Employees
    Under 49
    Average Hourly Rate
    $1100/hr
    Minimal Budget
    $25,000 - $50,000
  • Transforming Legacy Systems Into Modern Solutions

    CORE Migration helps organizations update old business applications, move enterprise systems, and lower technical debt through effective modernization strategies. Since 1997, we have focused on application modernization, software migration, custom development, cloud transformation, and AI-supported...

    Top Services:

    • Software Development
    • AI Development
    • Software Testing
    • Mobile App Development
    • Cloud Consulting
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    Location
    Ottawa, Canada
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $25,000 - $50,000
  • Global IT & Software Solution Company

    We have extensive global resources, deep industry, business process, and technological expertise, as well as a track record of producing uplifting success tales for businesses all over the world...

    Top Services:

    • Mobile App Development
    • Software Development
    • Software Testing
    • Wearables
    • CRM Consulting
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    Location
    Chicago, Illinois
    Number of Employees
    100 - 249
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $25,000 - $50,000
  • Apps Built to Actually Work.

    Austin App Devs helps startups, growing businesses, and enterprise teams turn ideas into reliable mobile products. We specialize in native iOS and Android apps, cross-platform development, AI-powered solutions, MVPs, UI/UX, backend integrations, testing, and post-launch support. Our sprint-based approach...

    Top Services:

    • Mobile App Development
    • AI Development
    • Software Development
    • Software Testing
    • UI/UX Design
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    Location
    Austin, Texas
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $25,000 - $50,000
  • No Magic. Just Logic.

    PureLogics is a leading custom software development services company that excels in web and mobile application development. Since our establishment in 2006, we've collaborated with renowned businesses and innovators across 33+ countries. With a talented pool of 400+ engineers and developers and 1200+ projects...

    Top Services:

    • Software Development
    • AI Development
    • Web Development
    • Mobile App Development
    • Staff Augmentation
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    Location
    New York City, New York
    Number of Employees
    250 - 499
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
  • Your One Stop Shop For Cybersecurity Services

    Ebryx LLC is a 360° cybersecurity and secure engineering company trusted by enterprises, startups, and governments to safeguard critical digital ecosystems. Since 2008, we have combined advanced threat research, 24/7 security operations, and deep product engineering expertise to deliver protection that is...

    Top Services:

    • Cybersecurity
    • DevOps Consulting
    • Cloud Consulting
    • Staff Augmentation
    • Big Data Analytics
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    Location
    Salem, New Hampshire
    Number of Employees
    100 - 249
    Average Hourly Rate
    $37/hr
    Minimal Budget
    $25,000 - $50,000
  • Services For Your Business Success

    With 20+ years of experience in complex custom software development projects, we are a reliable Swiss partner for software innovation. Our mission is supporting our customers with innovative solutions that set them apart from the average. We help companies strengthen their uniqueness and fully integrate their...

    Top Services:

    • Mobile App Development
    • Digital Strategy
    • UI/UX Design
    • eCommerce Development
    • Web Design
    • Show more
    Location
    Bubikon, Switzerland
    Number of Employees
    100 - 249
    Average Hourly Rate
    $120/hr
    Minimal Budget
    $25,000 - $50,000

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
130,849+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
47%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
60

Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.

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Frequently Asked Questions About Software Testing Companies

What services do software testing firms provide?

Software testing companies provide different testing services to identify errors, security risks, performance issues, and how the software behaves in real-life situations and across devices. As part of their software testing service, they also check if each feature works as expected, fix bugs, make improvements, and make sure new software development updates don’t break existing functions, so the software quality remains stable. 

Core services include: 

  • Functional testing  
  • Performance testing  
  • Security testing  
  • Usability testing  
  • Regression testing   
  • Automation testing  
  • Accessibility testing    
  • Mobile app testing  
  • API testing  
  • Compatibility testing across devices/browsers  
  • Compliance testing  
  • Testing with artificial intelligence (AI) tools
  • QA audit 

How much do software testing services cost?

Hourly rates for QA testing range from $25 to $200+. The final cost is determined based on the size of the software or application, its complexity, required testing type, tech stack (custom-built and older legacy systems cost more), and niche.  

The rate will also depend on the seniority of the software tester. Across the United States, junior quality assurance (QA) tester may charge $70 to $110 per hour, while the rate for a senior QA mentor and automation engineer can range from $130 to $200 per hour.   

Special software testing services such as QA audit goes from $5,000 to $25,000. 

How can businesses know what type of software testing do they need?

Businesses can determine what type of testing solutions they need based on the potential impact of failures and the likelihood of defects. Namely, if they encounter:  

  • Core functionality issues: Use functional testing to verify features work as expected 
  • Unstable code or new features: Use unit testing for individual components and integration testing for modules working together 
  • Poor system stability after updates: Seek regression testing to make sure new changes didn't break existing features 
  • Performance and load issues: Use performance and load testing to evaluate speed and scalability 
  • Security issues: Security and penetration testing are commonly used across apps handling sensitive user data 
  • Hard-to-navigate user experience (UX): Pursue usability testing to determine how intuitive the application is for end users 
  • Low compatibility across devices: Compatibility testing can evaluate how good the app works on different browsers, devices, and OS versions 

There is also the option to choose between manual and automated testing.  

Is automated testing more expensive than manual testing?

As an investment, automated testing is pricier than manual testing but offers a lower cost-per-test over time as it can run the same scripts repeatedly, without human intervention. Conversely, manual testing entails lower upfront fee, but its cost grows linearly as the project grows, as every test cycle requires paid hours from QA testers.  

So, for short-term projects or ones with shifting requirements, manual testing is considered a more economical option, whereas for maintenance and regression cycles, automated testing grants better return on investment. 

The main distinction between these methodologies is that manual testing relies on human observation and interaction to identify defects, whereas automated testing uses software scripts to compare outcomes against predicted results.  

Manual testing is best suited for exploratory testing, usability assessments, ad-hoc bug hunting, and minor hotfix verifications where script development would be inefficient. Automated testing, on the other hand, is primarily used for regression testing to make sure the new code does not break existing features. 

How do businesses measure the effectiveness of software testing?

The effectiveness of the software testing is measured via: 

  • Code coverage: The percentage of the code that has been tested 
  • Defect density: The number of defects found per unit of code 
  • Test case effectiveness: The percentage of test cases that identify defects; helps prune redundant and ineffective tests 
  • Time to detect and fix defects: The time it takes to identify and fix software defects and software bugs 
  • Defect leakage: The number of bugs that "escaped" to production versus those caught during the testing phase Â