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 06, 2026

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

Wellness & Fitness × $50,000 & Up ×
  • We Build. You Trust.

    Kodevent is a US-based software company providing top AI developers and custom solutions built with GPT-4, Claude, Gemini, and LLaMA. We deliver intelligent software to help you launch, grow, and accelerate your businessfocusing on clear communication and lasting partnerships...

    Top Services:

    • AI Development
    • Web Development
    • Staff Augmentation
    • Software Testing
    • Software Development
    • Show more
    Location
    Sheridan, Wyoming
    Number of Employees
    100 - 249
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $50,000 & Up

    Kodevent Services

    • AI Development
    • Web Development
    • Staff Augmentation
    • Software Testing
    • Software Development
    • Mobile App Development
    • eCommerce Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • FoodFork
    • Clasitique
    • Horizons
    • Octisglow
    • Docplay
    Data sourced from the agency's DesignRush profile

    Kodevent Reviews & Testimonials

    • Mica Palmer
      Mica Palmer Chief of Staff at Liquified
      5.0

      Mobile App Development Review from Mica Palmer

      They helped us solve issues. They designed an app for us.High level/quality of client attention and interaction. All communications, information exchages, and client servicing were well-conceived and well-executed. They kept me on my toes to provide them the information they needed from me. They kept excited about the project and, because of that, kept me optimistic and driving toward the success of my project.The culture of coaching and support they provide start-ups. They don't sleep well unless they know you have all the tools and chops to obtain success. I've never seen any other company provide such rich and valuable deliverables along with ingenious and compassionate client support. Kodevent is a beacon of know-how and wisdom in an otherwise dark ocean for any start-up that is hoping for success.

    • Devul Nahar
      Devul Nahar AI Infrastructure Engineer at Cerebras System
      5.0

      eCommerce Development Review from Devul Nahar

      We needed help designing the Frontend pages on my website. Also some design work. Everyday I would assign my Frontend developer some key tasks and deliverables. He would report back to me. An example of key deliverable he did was help design the logic of flow of grading when we have multiple types of questions. They were quick to respond and professional. They had great professionalism, good talent, and good support.

    • Peter Wallace
      Peter Wallace Owner at LATE BLOOMER STUDIO
      5.0

      Web Development Review from Peter Wallace

      Kodevent and their team were always great at communicating with our team. They worked very hard to finish tasks in the allotted time frame. When we had requests or changes, they were always quick to find a superior solution.Our project is still ongoing, but they are waiting on our side of things to complete and go live. I am appreciative of their great communication skills.They were always quick to respond and worked within our time frame.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Together, beyond expectations

    CHI Software is a technology solution provider that offers a full set of software-based services from custom software development to maintenance & support. Our talented team is passionate about Generative AI, Cloud Computing, Data Engineering, and IoT. CHI's success comes from care of every client...

    Top Services:

    • AI Development
    • Mobile App Development
    • Software Development
    • Web Development
    • Staff Augmentation
    • Show more
    Location
    Lviv, Ukraine
    Number of Employees
    500 - 999
    Average Hourly Rate
    $60/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    12 Projects Listed

    CHI Services

    • AI Development
    • Mobile App Development
    • Software Development
    • Web Development
    • Staff Augmentation
    • Software Testing
    • IoT
    • Big Data Analytics
    • IT Services
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Vodafone
    • Lecre
    • Media Mrkt
    Data sourced from the agency's DesignRush profile

    CHI Reviews & Testimonials

    • David Gornshtein
      David Gornshtein Co-Founder at Binadox
      5.0

      Web Development Review from David Gornshtein

      My company was looking for a development team to proceed with the development process. We needed to set up a service [that] allows our clients to monitor, control, and optimize their Cloud & SaaS spend. [The] CHI Software team delivered services and technologies we need[ed] to reach our financial goals. (Verified via email)

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your strategic partner in creating exceptional software products.

    We're an EU-based, full-service software development partner for growing tech companies and established mid-market businesses...

    Top Services:

    • Software Development
    • Mobile App Development
    • UI/UX Design
    • AI Development
    • Software Testing
    • Show more
    Location
    Zagreb, Croatia
    Number of Employees
    50 - 99
    Average Hourly Rate
    $60/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    8 Projects Listed

    DECODE Services

    • Software Development
    • Mobile App Development
    • UI/UX Design
    • AI Development
    • Software Testing
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Microsoft
    • Royal Caribbean
    • Asseco
    • AT&T
    • Bizzon
    • Qrypt
    • Contacts411
    • VeridenKey
    • GDI
    • Shake
    Data sourced from the agency's DesignRush profile

    DECODE Reviews & Testimonials

    • Igor Caleta-Car
      Igor Caleta-Car Review from Google
      5.0

      Igor Caleta-Car's Review Sourced from Google

      I worked at Decode for about a year, and during that time I had the chance to meet many wonderful colleagues who helped me grow professionally and learn new skills. Because of the nature of my role, I also had the chance to collaborate with clients across Europe, the USA, and the Middle East, and even visit some of them in person.The team I worked with was everything you could hope for - driven, proactive, and always willing to jump in and help. The development teams I was part of were well-balanced in both skills and personalities, led by highly experienced engineers who lead by example.Beyond the projects themselves, the company culture stands out. People are friendly, and the leadership is focused on sustainable growth while supporting employees development. Decode isn’t afraid to promote talent and encourage people to step outside their comfort zones in order to grow.The office is also in one of the best business neighborhoods in Croatia, with plenty of variety for employees nearby.Overall, I highly recommend Decode as a great place to work!

    • Marianne Van den Ende
      Marianne Van den Ende Review from Google
      5.0

      Marianne Van den Ende's Review Sourced from Google

      Working with DECODE has been a great experience so far! Their team is skilled, flexible, and always open to collaboration, which makes the process smooth and enjoyable. Their modern design approach aligns well with our vision, and they show a real commitment to delivering a strong final product.What we particularly appreciate is their willingness to engage and adapt as the project evolves. While some aspects require additional clarification along the way, they are always receptive to feedback and ready to adjust accordingly. The overall working atmosphere is positive and professional, making them a great partner to work with. Looking forward to the second half of our project!

    • Charles Lucas
      Charles Lucas Review from Google
      5.0

      Charles Lucas's Review Sourced from Google

      These guys are awesome. Such a great agency and do a fantastic job. Couldn't recommend more.

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

    Acumen Technology, an engineering-driven company founded on the principles of a highly respected IT services provider, aims to provide the highest level of technology support through a team of IT professionals with years of vertical-specific knowledge, relationships with industry-leading vendors, and a broad...

    Top Services:

    • Software Testing
    • Software Development
    • UI/UX Design
    • Staff Augmentation
    • AI Development
    • Show more
    Location
    Yerevan, Armenia
    Number of Employees
    Under 49
    Average Hourly Rate
    $45/hr
    Minimal Budget
    $50,000 & Up

    Acumen Technologies Services

    • Software Testing
    • Software Development
    • UI/UX Design
    • Staff Augmentation
    • AI Development
    • Mobile App Development
    • eCommerce Development
    • IoT
    • Wearables
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • CorelDraw/Alludo
    • Emids Technologies
    • First on Site
    • Level Home
    • Macadamian Technologies
    • Basic Center
    • Quantgate
    • BIVAC
    • FundmoreAI
    • Flox
    Data sourced from the agency's DesignRush profile
  • We Build Digital Products

    QTIM is a digital product development company that designs and builds complex, high-load web platforms, mobile applications, SaaS products, and AI-powered solutions for businesses worldwide. Ranked among Russia's leading development companies, QTIM has successfully delivered more than 280 projects across...

    Top Services:

    • Web Design
    • Web Development
    • Mobile App Development
    • Design Services
    • Software Testing
    • Show more
    Location
    Tula, Russia
    Number of Employees
    50 - 99
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    8 Projects Listed

    QTIM Services

    • Web Design
    • Web Development
    • Mobile App Development
    • Design Services
    • Software Testing
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Russian Agricultural Bank
    • 4fresh
    • Ozon
    • INVITRO
    • Sber
    • MATLAB
    • Ponimayu
    • Exponenta
    • Online School No. 1
    Data sourced from the agency's DesignRush profile
  • 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

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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