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

13 Companies-Rankings updated: October 26, 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.

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  • Sketch Development Services

    VerifiedVerified by the DesignRush team for authenticity and credibility.

    Build it. Run it. Own it.

    We embed development teams to build the right AI-enabled custom software, and equip your team to run it...

    Top Services:

    • Software Development
    • Cloud Consulting
    • UI/UX Design
    • eCommerce Development
    • DevOps Consulting
    • Show more
    Location
    St. Louis, Missouri
    Number of Employees
    Under 49
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    8 Projects Listed

    Sketch Development Services Services

    • Software Development
    • Cloud Consulting
    • UI/UX Design
    • eCommerce Development
    • DevOps Consulting
    • Staff Augmentation
    • AI Development
    • Software Testing
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • U.S. Bank
    • Centene Corporation
    • Maritz
    • Change Healthcare
    • Stifel
    • Reinsurance Group of America (RGA)
    • bioMerieux
    • CareSource
    • CENTEGIX
    • Purina
    Data sourced from the agency's DesignRush profile

    Sketch Development Services Reviews & Testimonials

    • Monica
      Monica Review from Google
      5.0★

      Monica's Review Sourced from Google

      Amazing and talented people. I’ve worked for both client and agency side and can can say their partnership is amazing. They truly care about ongoing operations and not just ending it at a project level. Highly recommend! Message me if you want specifics.

    • John Andesilich
      John Andesilich Review from Google
      5.0★

      John Andesilich's Review Sourced from Google

      I own a marketing firm in Troy MO and I recently met with Calvin at Sketch Development Services to discuss a software development project I have been thinking about pursuing. He was very nice, easy to speak to and even though his field is a bit out of my knowledge base, he was able to explain things in a way that made perfect sense. I look forward to working with him and his team in the future and recommend anyone looking for a software or app development company to give them a try.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Engineering peace of mind

    At Vention, unparalleled customer care isnt just a promise its our mission. We blend personalized experience, unwavering attention to detail, and a genuine passion for your business, ensuring that every aspect of our collaboration is tailored to your success...

    Top Services:

    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Software Testing
    • Web Development
    • Show more
    Location
    New York City, New York
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    15 Projects Listed
  • 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
  • IoT, AI/ML, Mobile apps, Cloud & Web apps, Embedded Systems & Hardware

    End-to-end development in IoT, Embedded Systems, Firmware, DevOps, AI/ML, Mobile Apps, Enterprise Software and Cloud. Engineers ensure top-grade code, rigorous QA and scalable digital products. Engage via fixed-bid projects, agile delivery pods, dedicated teams, or staff-augmentation...

    Top Services:

    • IoT
    • Wearables
    • AI Development
    • Mobile App Development
    • Software Development
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    Location
    Kochi, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $10,000 - $25,000
  • Ensuring Quality, Empowering Excellence.

    KiwiQA is a global leader in software testing, delivering high-quality solutions across industries. With expertise in automation, performance, security, and accessibility testing, we empower businesses to launch flawless and secure software faster...

    Top Services:

    • Software Testing
    Location
    Sydney, Australia
    Number of Employees
    100 - 249
    Average Hourly Rate
    $10/hr
    Minimal Budget
    $10,000 - $25,000
  • Technology Connects

    Bellosoft is a global software development agency helping businesses scale through custom solutions in web, mobile, AI, and cloud technologies. With a focus on innovation, agility, and measurable results, we partner with startups and enterprises in the US, UK, and Europe to deliver reliable products and...

    Top Services:

    • Software Development
    • UI/UX Design
    • Web Development
    • Mobile App Development
    • eCommerce Development
    • Show more
    Location
    Watford, United Kingdom
    Number of Employees
    Under 49
    Average Hourly Rate
    $65/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    16 Projects Listed
  • We ship. You scale.

    LI Solutions builds custom software that ships. Booking systems, healthcare platforms, e-commerce, AI tools, and the infrastructure underneath. We deliver MVPs in 1-2 months with fixed pricing that doesn't drift. 20+ years of experience, HIPAA-compliant by default, and an official Shopify Partner with Top 5...

    Top Services:

    • Digital Services
    • Graphic Design
    • AI Development
    • Mobile App Development
    • Software Development
    • Show more
    Location
    Tallinn, Estonia
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $10,000 - $25,000
  • Here to Build.

    Akveo is an AI consulting and software development company, helping organizations build, modernize, and scale digital products...

    Top Services:

    • Mobile App Development
    • AI Development
    • Software Development
    • Web Development
    • Software Testing
    • Show more
    Location
    Austin, Texas
    Number of Employees
    100 - 249
    Average Hourly Rate
    $55/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    12 Projects Listed
  • Anywhere, anytime, be mobile

    For a decade, we have been committed to turning ideas into reality! Since our inception, we have nurtured an ideal: to channel ideas into projects that not only come to fruition, but also contribute positively to society...

    Top Services:

    • Mobile App Development
    • Web Design
    • eCommerce Development
    • Software Testing
    • Software Development
    • Show more
    Location
    BrasĂ­lia, Brazil
    Number of Employees
    Under 49
    Average Hourly Rate
    $270/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • OPD Design is a Shenzhen-based product design and development company

    One-stop product design & development for hardware startups in Shenzhen, China. Industrial design, prototyping, manufacturing. iF & Red Dot winner...

    Top Services:

    • Product Design
    • Package Design
    • Logo Design
    • Design Services
    • Wearables
    • Show more
    Location
    Shenzhen, China
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $1,000 - $10,000
  • We build digital infrastructure for business. Not just simple websites.

    At Uni-Verso693, we turn operational challenges into robust technology solutions. We build custom software, web and mobile apps, and integrate intelligent agents (LLMs/RAG) designed to eliminate business inefficiencies. We create proprietary and client digital ecosystems using agile methodologies, clean code...

    Top Services:

    • Design Services
    • Web Design
    • Web Development
    • eCommerce Development
    • Software Testing
    • Show more
    Location
    Villa Alemana, Chile
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • Making your business ideas come true

    Etech All is a leading software development company specializing in creative web design and robust web development solutions. We help businesses build a powerful online presence through innovative, user-focused, and results-driven digital experiences. Our expert team delivers customized, high-quality...

    Top Services:

    • Web Development
    • WordPress Website Design
    • Mobile App Development
    • Software Development
    • Software Testing
    • Show more
    Location
    Miami, Florida
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    Under $1,000
  • We design it right, then ship it right.

    ArchAI Engineering is an architect-first software engineering firm for teams that need dependable releases. Every engagement starts with the architecture: we translate your business objective into a clear technical design, then product engineers deliver it end to end, accelerated by AI-augmented workflows. We...

    Top Services:

    • Product Design
    • eCommerce Development
    • Web Development
    • Software Testing
    • AI Development
    • Show more
    Location
    Cairo, Egypt
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    3 Projects Listed

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
129,656+
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
13

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

See how rankings and monetization work.

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