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

7 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.

Insurance × $50,000 & Up ×
  • Top Healthcare Product, Technology, & Venture Design Firm

    Sidebench is the top healthcare technology design and software engineering firm in the US. We combine strategy, design, technical architecture at every point of our process. We are known for delivering extraordinary business results...

    Top Services:

    • Mobile App Development
    • Software Development
    • AI Development
    • Wearables
    • UI/UX Design
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    11 Projects Listed

    Sidebench Services

    • Mobile App Development
    • Software Development
    • AI Development
    • Wearables
    • UI/UX Design
    • Web Development
    • Product Design
    • CRM Consulting
    • Cybersecurity
    • Software Testing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • American Heart Association
    • Children's Hospital Los Angeles (CHLA)
    • Hoag Hospital
    • Cortica
    • A16Z (Andreessen Horowitz)
    • Lightspeed Venture Partners
    • Microsoft
    • Rud Bull
    • HP
    • Sony
    Data sourced from the agency's DesignRush profile

    Sidebench Reviews & Testimonials

    • Abhit
      Abhit Undisclosed at Undisclosed
      4.5

      Translation Services Review from Abhit

      They provide consulting services for a healthcare service provider. Sidebench contributed their expertise to a comprehensive mobile application to make sure it would pass Apple Store requirements. Thanks to Sidebench`s input, the application launched on the Apple Store after the first submission. Sidebench`s response times were quick, and they were willing to accommodate a unique working arrangement. The relationship that we had was probably unique; most companies would push to do the development themselves. We only needed Sidebench`s know-how, and they were willing to accommodate us.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • A lifelong partner to solve any tech challenge together

    Hi there! We were expecting you!We are a nearshore software services and consulting company that partners with forward-thinking companies to achieve their business goals and accelerate growth in the digital age.We are seen as a lifelong partner for tackling any tech challenge...

    Top Services:

    • Software Development
    • Mobile App Development
    • IT Services
    • UI/UX Design
    • Web Development
    • Show more
    Location
    Montevideo, Uruguay
    Number of Employees
    100 - 249
    Average Hourly Rate
    $70/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    1 Project Listed

    Switch Software Solutions Services

    • Software Development
    • Mobile App Development
    • IT Services
    • UI/UX Design
    • Web Development
    • Software Testing
    • AI Development
    • VR/AR
    • Cloud Consulting
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Penske Logistics
    • Santander Consumer
    • Zenus Bank
    • Verifone
    • BBVA Bank
    • Axletree
    • Oddissey
    • BCIE
    • Sodexo
    • Allied World
    Data sourced from the agency's DesignRush profile

    Switch Software Solutions Reviews & Testimonials

    • Hernán Garro
      Hernán Garro Review from Google
      5.0

      Hernán Garro's Review Sourced from Google

      Excellent working place. People is the most valuable characteristic. Interest in continuous improvement is not less remarkable. It is a comfortable place to work with plenty of amenities.

    • Andres Sierra
      Andres Sierra Review from Google
      5.0

      Andres Sierra's Review Sourced from Google

      Test your software before taking it to production, do it with what you are developing or with what you are buying.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Supercharge - Innovating Digital Product Development

    At Supercharge, we partner with our clients to turn disruption into opportunity by creating transformative digital solutions. With over 200 digital experts across New York, London, Amsterdam, Helsinki, Vienna, and Budapest, we develop digital strategies, design delightful interfaces, and build robust software...

    Top Services:

    • Software Development
    • AI Development
    • Digital Services
    • Product Design
    • Mobile App Development
    • Show more
    Location
    London, United Kingdom
    Number of Employees
    100 - 249
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    6 Projects Listed

    Supercharge Services

    • Software Development
    • AI Development
    • Digital Services
    • Product Design
    • Mobile App Development
    • Digital Strategy
    • IoT
    • UI/UX Design
    • Software Testing
    • Managed Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Britned
    • Eleclink
    • gateretail
    • OTP Bank
    • Kodak Alaris
    • Deutsche Telekom
    • Vodafone
    • Santander
    • VYRD
    • Cambridge Mobile Telematics
    Data sourced from the agency's DesignRush profile
  • Mobile App Devs Who Understand Business, Not Just Code

    Touchlane is a European mobile development studio that truly gets startups and SMBs. With 10+ years on the market, we turn ideas in fintech, health & fitness, and entertainment mobile development into secure, high-performing apps users love...

    Top Services:

    • Mobile App Development
    • Software Development
    • Staff Augmentation
    • Cybersecurity
    • IT Services
    • Show more
    Location
    Tallinn, Estonia
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    5 Projects Listed

    Touchlane Services

    • Mobile App Development
    • Software Development
    • Staff Augmentation
    • Cybersecurity
    • IT Services
    • Business Consulting
    • Wearables
    • AI Development
    • IoT
    • Software Testing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • ColorTherapy
    • Citrus AI
    • Shape
    • Promo App
    • Vicinity
    • Musicfeed
    • Gaimin
    • Netapix
    • SmartVolt
    • Elo Health
    Data sourced from the agency's DesignRush profile
  • Designing the Digital Future.

    A top custom software development firm dedicated to delivering bespoke digital products that drive innovation and help you achieve your brand goals. A full-stack developer with expertise in every major platform and language, we design and deliver custom applications and host and maintain the solutions we...

    Top Services:

    • Software Development
    • Mobile App Development
    • UI/UX Design
    • Software Testing
    • WordPress Website Design
    • Show more
    Location
    Spring, Texas
    Number of Employees
    Under 49
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $50,000 & Up

    Espresso Moon Services

    • Software Development
    • Mobile App Development
    • UI/UX Design
    • Software Testing
    • WordPress Website Design
    • eCommerce Development
    • Web Development
    • AI Development
    • VR/AR
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • DistributionNOW
    • Tesla
    • Nucor Steel
    • Everest Funeral Concierge
    • Flexitallic
    • Solvay Dental
    • Stream Realty
    • Wilson Perumal
    • Neuhaus Academy
    • SafeFleet
    Data sourced from the agency's DesignRush profile

    Espresso Moon Reviews & Testimonials

    • Bradley Collins
      Bradley Collins Review from Google
      5.0

      Bradley Collins's Review Sourced from Google

      Working with the guys at Espresso Moon (Scott, Doug, Tim and Dwayne) was truly a great collaboration and experience. They didn't just throw a website together for us, they helped us to reinvent ourselves. They go out of their way to get to know you and your business to the fullest extent, and that is a quality that is not often seen. If I were to recommend a web design/hosting company to anyone, Espresso Moon would be the one and only name I give. Thank you for your service and support!

    • Meredyth Jones
      Meredyth Jones Review from Google
      5.0

      Meredyth Jones's Review Sourced from Google

      I worked primarily with Scott, Tim and Doug to build a fairly complicated site: Paypal/credit card payments, video training modules, a graded quiz, and issuance of a completion certificate. They were the only website company that invited me to an in-person meeting and that was tremendously helpful in me understanding how they work and them understanding my goals. Large Animal Consulting & Education launched 2 days ago and the site is running smoothly. I'm very happy with the site they designed (they also designed my logos) and am looking forward to using them to support and add to the site down the road.

    • Caleb Schallert
      Caleb Schallert Review from Google
      5.0

      Caleb Schallert's Review Sourced from Google

      Doug Wheeler is the owner of Espresso Moon and he has provided my small business excellent IT technical support for our website. His team helped me out by removing malicious code that was affecting my site right after the Heart Bleed epidemic last year. He got my site back up and running so i could continue business and save my online reputation. I would recommend Espresso Moon LLC to anyone in need of a new website or mobile application because they follow through with what they promise to do, on time and on budget. They are truly a pleasure to work with!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • 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

    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
  • Enabling companies to adapt and scale AI.

    AI enablement and custom AI development company helping enterprises and mid-market leaders adopt, scale, and succeed with AI - faster, safer, and smarter. We simplify the complexity of enterprise AI by guiding organizations from strategy to deployment, combining consulting, custom development, and proven AI...

    Top Services:

    • Product Design
    • UI/UX Design
    • AI Development
    • IoT
    • Software Development
    • Show more
    Location
    Zagreb, Croatia
    Number of Employees
    50 - 99
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $50,000 & Up

    Margins Services

    • Product Design
    • UI/UX Design
    • AI Development
    • IoT
    • Software Development
    • Software Testing
    • Mobile App Development
    • Design Services
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • John Hopkins University
    • Mars
    • Croatian Medical Chamber
    Data sourced from the agency's DesignRush profile

    Margins Reviews & Testimonials

    • Marko Bajlo
      Marko Bajlo Review from Google
      5.0

      Marko Bajlo's Review Sourced from Google

      I’ve got a chance to cooperate with agency, very professional and problem solving oriented team!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews

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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