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
11 Companies-Rankings updated: September 04, 2026
Every agency on DesignRush has been evaluated for its expertise and client feedback to empower informed choices. Some listings include paid partnerships.
BluePixel is an award-winning UX/UI and software development international company. We combine a human-centered approach with the latest tech stack to create world-class software...
Top Services:
UI/UX Design
Software Development
AI Development
CRO
Web Development
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Location
Mexico City, Mexico
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
103 Projects Listed
BluePixel Services
UI/UX Design
Software Development
AI Development
CRO
Web Development
Mobile App Development
Software Testing
Web Design
eCommerce Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Pepsico
Stadibox
Profuturo
BBVA
Asepxia
Choco Roles
SemiNuevos
DiDi
Bimbo
Office Depot
Data sourced from the agency's DesignRush profile
BluePixel Reviews & Testimonials
Diana Moreno
Review from Google
5.0★
Diana Moreno's Review Sourced from Google
Excellent service and results! They did a very good job with my brand, my branding and my website! Professional and super creative! I recommend them one hundred without a doubt!!
Andres Vergara
Review from Google
5.0★
Andres Vergara's Review Sourced from Google
Widely recommended! Blue Pixel helped us a lot with our UX needs and is the best agency we have worked with in Mexico. Thanks and congratulations BP.
Gabriel Jimenez
Review from Google
5.0★
Gabriel Jimenez's Review Sourced from Google
Good experience, the designs were as expected, high quality, I highly recommend them, personalized attention and very professional.
Reviews verified by DesignRush and sourced from the agency's profile
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Your business faces unique challenges. Let's work together to create a custom mobile app or web solution to meet those challenges head-on...
Top Services:
Mobile App Development
Software Development
Staff Augmentation
IoT
AI Development
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Location
Nashua, New Hampshire
Number of Employees
250 - 499
Average Hourly Rate
$35/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
8 Projects Listed
Zco Corporation Services
Mobile App Development
Software Development
Staff Augmentation
IoT
AI Development
UI/UX Design
Web Development
Software Testing
VR/AR
Wearables
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Volkswagen
Harvard University
BBC America
Verizon
Liberty Mutual
Microsoft
Samsung
Eversource
APR Energy
Dartmouth College
Data sourced from the agency's DesignRush profile
Zco Corporation Reviews & Testimonials
Mark Gratiot
Director of R&D at Streamline Automation
5.0★
Cross-Platform Review from Mark Gratiot
In addition to building out a native remote inspection app for iPads, Zco concurrently ported the software to a Xamarin platform for Windows users. Zco has released nine major iterations of the iPad app, each available in the App Store, as well as the initial version of the cross-platform Xamarin build. Their nimble team boasts a wide breadth of skills to match any given situation. Having clear documentation upfront has reduced onboarding time.
Katie Matter
Project Manager at Southwestern Advantage
5.0★
Mobile App Development Review from Katie Matter
Zco Corporation provided full-stack mobile app development to an educational resource retail organization. They worked in Unity to build a cross-platform resource for users to advance through various curricula. The app has successfully been moved into preproduction and the second phase of development, completely satisfying project stakeholders with the quality of both its designs and functionality. The Zco Corporation team is highly creative and collaborative throughout their work.
J. Michael Webb
CEO at CheckMySpot
5.0★
Startup Review from J. Michael Webb
J. Michael Webb from CheckMySpot chose Zco Corporation for app development due to its expertise. Zco adeptly developed a hybrid mobile teledermatology platform and an admin website, demonstrating excellent communication, responsiveness, and innovation. Despite the project's evolving and innovative nature, Zco seamlessly integrated Webb's intent and met all challenges, leaving him with no suggestions for improvement. (Verified via email/call)
Reviews verified by DesignRush and sourced from the agency's profile
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Kernelics is a boutique web and mobile software development firm
for 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
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
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
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CitrusDev is a team of experts with a general focus on the Internet of Things (IoT) project development. Our team's key points of interest are Smart Home, Smart City, Smart Farm, Automotive, Healthcare, and Indoor navigation domains. We cover the Hi-tech, Retail, Fintech, and Education industries as well...
Top Services:
IoT
Web Development
Mobile App Development
Wearables
WordPress Website Design
Show more
Location
Kyiv, Ukraine
Number of Employees
Under 49
Average Hourly Rate
$35/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
7 Projects Listed
CITRUSDEV Services
IoT
Web Development
Mobile App Development
Wearables
WordPress Website Design
Web Design
Software Development
AI Development
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
DHL
GoGo Band Inc
SmartFarm
Data sourced from the agency's DesignRush profile
CITRUSDEV Reviews & Testimonials
Vadym Hryshchenko
Head at NGO Typical Dymer
5.0★
Web Development Review from Vadym Hryshchenko
We worked with Citrus Dev on website developing for our NGO, and the experience was outstanding. The project was delivered on time, within budget, and the quality exceeded our expectations. Communication was smooth and efficient throughout the entire process, making collaboration easy and productive. We highly recommend this team for their professionalism and exceptional work.
Mark Joy
Founder at markhjoy.com
5.0★
Mobile App Development Review from Mark Joy
Dima S. responded to one of my job postings on Upwork for creating an audio-related application. He explained the estimated cost of developing such an app, and advised that it would be much more costly than I had anticipated. I was not familiar at all with the costs associated with developing apps, so his explanation was very helpful.
He saved me money by going above and beyond to research existing apps that provided similar functionality to the requirements I was seeking. He also found instructions for using native Apple settings for audio that would solve my problem. The settings he found even allowed import of an audiogram that I had gotten at the audiologist for my specifc problem.
Though he did not end up developing an app for me, Dima saved me a ton of money by spending his time to research possible existing solutions which I had not found during my own search.
I would highly recommend Dima for his level of care for projects and his customers.
Anna Abdulova
CEO at Abdulova. Running coach.
5.0★
WordPress Website Design Review from Anna Abdulova
Working with CitrusDev was very comfortable and convenient.
CitrusDev developed a website (WordPress) for me with the services I provide to my clients.
Since I have a shortage of time, it was important that the team did not need my constant involvement in the process.
After discussing all the details, we met a few times to decide on further actions and make corrections.
The work format was convenient and clear. And most importantly, it was flexible.
The team responded quickly when changes were needed and gave advice for better results.
I am happy with our joint project and want to thank CitrusDev for their professionalism and ease of work.
Thank you.
And I recommend them.
Reviews verified by DesignRush and sourced from the agency's profile
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VerifiedVerified by the DesignRush team for authenticity and credibility.
Top Flutter Development Company for Enterprises and Scale-Ups
LeanCode is a full-cycle software development company designated as an official Flutter consultant by Google. With a team of 80+ tech experts, we build software solutions that drive change and help enterprises scale...
Top Services:
Mobile App Development
Software Development
Software Testing
Staff Augmentation
Show more
Location
Warsaw, Poland
Number of Employees
50 - 99
Average Hourly Rate
$99/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
19 Projects Listed
LeanCode Services
Mobile App Development
Software Development
Software Testing
Staff Augmentation
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Credit Agricole Bank Polska
Virgin Money
E. Wedel
Maspex
Sonova
Millennium Bank
Welliba
Tide
Shell
Prospector
Data sourced from the agency's DesignRush profile
LeanCode Reviews & Testimonials
Matej Rešetár
Review from Google
5.0★
Matej Rešetár's Review Sourced from Google
Not only do they make great apps, but they also have the best coffee in the area. For that reason, I recommend coming to a meeting in person 😉
Igor Pielas
Review from Google
5.0★
Igor Pielas's Review Sourced from Google
Working with a team is a combination of professionalism with high energy and a proactive approach to software development challenges. I definitely recommend it and will be happy to answer questions based on our project - the Activy application for B2B and Polish cities.
Reviews verified by DesignRush and sourced from the agency's profile
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Coderus - Building Smart Code Solutions for the Future
Coderus is a leading software and app development company based in the UK, and we provide services to start-ups, medium businesses, and large blue-chip enterprises globally...
Top Services:
Mobile App Development
IoT
Software Development
Software Testing
Design Services
Show more
Location
Martlesham, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$99/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
5 Projects Listed
Coderus Services
Mobile App Development
IoT
Software Development
Software Testing
Design Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
INEOS Team UK (America's Cup)
Bowers & Wilkins
ELGA Veolia
Land Rover BAR
Frontier Silicon
Data sourced from the agency's DesignRush profile
Coderus Reviews & Testimonials
Petra Napthine
Review from Google
5.0★
Petra Napthine's Review Sourced from Google
I completed my work experience from the 8th - 12th of July at Coderus. I learnt lots during the week and everyone was very helpful and friendly. I'd recommend this to anyone interested in app development as its a great way to learn about the industry.
Emil Aby
Review from Google
5.0★
Emil Aby's Review Sourced from Google
I attended work experience at Coderus from 1st-5th July. It was a great experience, i particularly enjoyed creating my own app. Would definitely recommend.
Daniel Healy
Review from Google
5.0★
Daniel Healy's Review Sourced from Google
Coderus are an excellent team. I've worked with them on 5 projects now, all of which were clearly laid out, tracked and delivered, from start to finish.
They're always happy to work to our expectations, cater to the specific needs of the business, and provide training on the tools they create upon delivery.
Reviews verified by DesignRush and sourced from the agency's profile
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Transforming Your Products Tech Foundation: Scaling, Maintainability, and Seamless Usability
Rolique is a comprehensive software development firm, distinguished by an extensive portfolio encompassing more than 110 triumphant endeavors across the domains of healthcare, fintech, and industrial technology sectors...
Top Services:
Web Development
UI/UX Design
Mobile App Development
AI Development
Software Development
Show more
Location
Lviv, Ukraine
Number of Employees
50 - 99
Average Hourly Rate
$65/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
9 Projects Listed
Rolique Services
Web Development
UI/UX Design
Mobile App Development
AI Development
Software Development
Software Testing
DevOps Consulting
Cybersecurity
Cloud Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Empowering companies with skilled engineering talent so they can execute their digital transformation and product development strategies affordably and seamlessly...
Top Services:
Mobile App Development
Software Development
Staff Augmentation
DevOps Consulting
IT Services
Show more
Location
London, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$25/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
1 Project Listed
Goodcore Software Services
Mobile App Development
Software Development
Staff Augmentation
DevOps Consulting
IT Services
AI Development
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Algosoup is a London-based software development company that provides AI-native, forward-deployed engineering services by embedding software engineers into client teams. It supports startups, scaleups, enterprises, and agencies with rapid MVP development, product engineering, AI integration, legacy...
Top Services:
AI Development
Software Development
Mobile App Development
Software Testing
eCommerce Development
Show more
Location
London, United Kingdom
Number of Employees
Under 49
Average Hourly Rate
$300/hr
Minimal Budget
$25,000 - $50,000
Algosoup Services
AI Development
Software Development
Mobile App Development
Software Testing
eCommerce Development
VR/AR
Blockchain
IoT
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Your gateway to bespoke technology solutions that propel your business into the future.
At Colchuck Consulting, our mission is to drive growth and innovation through tailored technology solutions. Founded by industry experts, our agency offers a unique blend of skills and knowledge, providing a boutique experience with cutting-edge technology and strategic support to maximize your ideas and...
Top Services:
Software Development
Mobile App Development
Cloud Consulting
Web Development
UI/UX Design
Show more
Location
Burien, Washington
Number of Employees
Under 49
Average Hourly Rate
$150/hr
Minimal Budget
$25,000 - $50,000
Portfolios Count
3 Projects Listed
Colchuck Consulting Services
Software Development
Mobile App Development
Cloud Consulting
Web Development
UI/UX Design
Software Testing
IT Services
Cybersecurity
DevOps Consulting
IT Compliance Solution
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Boost Baseball
Roster Champs
Hope Gives
Pastor Stays
MAS Agency
Data sourced from the agency's DesignRush profile
Colchuck Consulting Reviews & Testimonials
Jimmy Portner
Review from Google
5.0★
Jimmy Portner's Review Sourced from Google
We had a fantastic experience working with this web design team! Not only are they incredibly skilled at what they do, but they were also a pleasure to collaborate with every step of the way. They brought in a talented graphic designer who helped us create a cohesive brand identity that was beautifully woven throughout the site. The entire team was thoughtful, responsive, and genuinely committed to bringing our vision to life. Highly recommend!
Chris Wegeleben
Review from Google
5.0★
Chris Wegeleben's Review Sourced from Google
Colchuck Consulting has been a game-changer for my business! They are currently building a custom app for us, and the process has been seamless. Their team is highly skilled, communicative, and genuinely invested in understanding our needs. They’ve provided innovative solutions and delivered exceptional work at every step.
I’m excited to see the final product and confident it will exceed expectations. If you’re looking for a reliable and professional team to bring your ideas to life, I highly recommend Colchuck Consulting!
AmberRae Brantley
Review from Google
5.0★
AmberRae Brantley's Review Sourced from Google
I had the pleasure of working with Colchuck Consulting on my organization's website and their expertise and customer service exceeded all expectations. They assisted me from initial conception all the way through our website launch, with an eye for detail. They helped me take my ideas and transformed them into a well-designed, user-friendly website that not only looks fantastic but also functions seamlessly. Additionally, their ongoing support and willingness to make adjustments along the way have been invaluable. As an entrepreneur starting a new project, working with them has been so helpful. I wholeheartedly recommend Colchuck Consulting to anyone in need of top-notch web-design, or custom technology solutions.
Reviews verified by DesignRush and sourced from the agency's profile
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Boutique studio of senior engineers building web, mobile, and AI products since 2015. We embed as a long-term extension of your team and ship code that lasts. 5.0 on Clutch, top 1% on Upwork...
Top Services:
Web Development
Mobile App Development
Software Development
Software Testing
AI Development
Show more
Location
Los Angeles, California
Number of Employees
Under 49
Average Hourly Rate
$99/hr
Minimal Budget
$25,000 - $50,000
EltexSoft Services
Web Development
Mobile App Development
Software Development
Software Testing
AI Development
Staff Augmentation
IT Services
Engineering
DevOps Consulting
Wearables
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
IT Industry
B2B Industry
Fintech Industry
Data sourced from the agency's DesignRush profile
EltexSoft Reviews & Testimonials
Yana Vlasova
Review from Google
5.0★
Yana Vlasova's Review Sourced from Google
Choose EltexSoft for perfection! LA's best-kept secret in software development. Our experience was top-notch—5 stars all the way!
Dasha Ozerchuk
Review from Google
5.0★
Dasha Ozerchuk's Review Sourced from Google
EltexSoft is a software dream team! Their LA-based wizards turned our ideas into digital magic. 5 stars for excellence!
Reviews verified by DesignRush and sourced from the agency's profile
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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.
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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