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

4 Companies-Rankings updated: September 03, 2026

Every agency on DesignRush has been evaluated for its expertise and client feedback to empower informed choices. Some listings include paid partnerships.

Music × $25,000 - $50,000 ×
  • Mobile & Web Software Dev Team

    Kernelics is a boutique web and mobile software development firmfor startups and tech companies...

    Top Services:

    • Mobile App Development
    • Staff Augmentation
    • Product Design
    • Software Development
    • eCommerce Development
    • Show more
    Location
    London, United Kingdom
    Number of Employees
    50 - 99
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    18 Projects Listed

    Kernelics Services

    • Mobile App Development
    • Staff Augmentation
    • Product Design
    • Software Development
    • eCommerce Development
    • IT Services
    • Web Design
    • Software Testing
    • Web Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Small Business Industry
    • Fintech Industry
    • Marketing Industry
    Data sourced from the agency's DesignRush profile

    Kernelics Reviews & Testimonials

    • Dzmitry Novikau
      Dzmitry Novikau Co-Founder at Obsidian AI
      5.0

      Staff Augmentation Review from Dzmitry Novikau

      I worked with Kernelics on a crypto project where we needed help with both design and development. From the beginning, the team was easy to communicate with and clearly understood what we were trying to build.The designer improved our initial ideas by making the user experience more intuitive. They suggested better ways to structure the navigation and user flow, which helped reduce friction and made the product easier to use.We also brought in one of their developers, who worked alongside our existing team member. They collaborated well, completed the work on time, and handled some challenging parts of the exchange functionality without any issues.Overall, Kernelics delivered quality work, stayed within budget, and were professional throughout the process. I’d recommend them to others looking for a reliable design and development partner, especially for crypto or fintech projects.

    • Stsiapan Kolesau
      Stsiapan Kolesau CEO at Module Technology
      5.0

      Web Development Review from Stsiapan Kolesau

      I CEO at the construction company specializing in modular buildings and their components. With years of experience and multiple projects, we decided to expand our online presence beyond our two existing landing pages. We needed a corporate portal to showcase products, manage content easily, and dynamically calculate product costs.On a recommendation, we chose Kernelics, and their organized approach and clear task division impressed us from the start. They began with an in-depth analysis of our needs and a competitive review. For the design, we requested a minimalist style, and the results were spot on, requiring only minor tweaks to meet our expectations.For development, Kernelics selected React, Next.js, and TypeScript, with Strapi for the admin panel. They also integrated Google Sheets to handle dynamic price calculations, enabling instant updates on the site by simply modifying the spreadsheeta feature weve found incredibly useful.Now, two years later, the portal continues to support our growth, and were planning new developments for our main site.Kernelics stood out for their transparent approach and professionalism at every stage, and I confidently recommend them to anyone seeking a reliable web development partner.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Lampa is a Comfy Software Development

    Lampa delivers high-quality outsourcing services and custom software solutions that drive innovation and business success in today's competitive digital landscape. We are helping to launch start-ups ! We are developing 20+ software solutions every year. Our projects reached more than 12 000 000 downloads...

    Top Services:

    • Web Development
    • Mobile App Development
    • Software Testing
    • UI/UX Design
    • IT Services
    • Show more
    Location
    Vinnytsia, Ukraine
    Number of Employees
    50 - 99
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    24 Projects Listed

    Lampa Software Services

    • Web Development
    • Mobile App Development
    • Software Testing
    • UI/UX Design
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Dogiz
    • 1+1 Media
    • Virgin Radio
    • LetyShops
    • Audiokitab
    • Crypto Crew
    Data sourced from the agency's DesignRush profile

    Lampa Software Reviews & Testimonials

    • Stu Da
      Stu Da Review from Google
      5.0

      Stu Da's Review Sourced from Google

      If you need to develop a high-quality mobile application, then this is the place for you. They do it well (1+1 and LetyShops did not complain at all) and maintain an excellent balance of price and quality.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • We Help You Build Your Software Projects Your Way.

    Expert software developers delivering top-tier web and mobile apps for startups and SMBs. With diverse industry experience spanning e-commerce, fintech, online dating, media, and travel, we bring a wealth of expertise to every project...

    Top Services:

    • Staff Augmentation
    • Mobile App Development
    • Software Development
    • Software Testing
    • Web Development
    • Show more
    Location
    St. Petersburg, Florida
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000

    Softrizon LLC Services

    • Staff Augmentation
    • Mobile App Development
    • Software Development
    • Software Testing
    • Web Development
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Audicaster
    • Orcas Cupid
    • Alopago
    • Avele
    Data sourced from the agency's DesignRush profile
  • Mentoring you through code!

    MentorSol is your premier destination for bespoke software development and expert staff augmentation solutions. We are dedicated to providing tailored services that drive innovation and efficiency, ensuring your business reaches its full potential...

    Top Services:

    • Web Development
    • WordPress Website Design
    • ERP Consulting
    • Staff Augmentation
    • IT Compliance Solution
    • Show more
    Location
    Dubai, United Arab Emirates
    Number of Employees
    250 - 499
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $25,000 - $50,000

    MentorSol Services

    • Web Development
    • WordPress Website Design
    • ERP Consulting
    • Staff Augmentation
    • IT Compliance Solution
    • IT Services
    • Big Data Analytics
    • AI Development
    • Software Testing
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Kwot
    • Hive-Tax
    • Re-quest
    Data sourced from the agency's DesignRush profile

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  

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