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.
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
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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 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
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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 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 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
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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
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
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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
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
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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 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 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 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
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
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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 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 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
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
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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 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.Â
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. Â
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. Â
Special software testing services such as QA audit goes from $5,000 to $25,000.Â
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:Â Â
Core functionality issues: Use functional testing to verify features work as expectedÂ
Unstable code or new features: Use unit testing for individual components and integration testing for modules working togetherÂ
Poor system stability after updates: Seek regression testing to make sure new changes didn't break existing featuresÂ
Performance and load issues: Use performance and load testing to evaluate speed and scalabilityÂ
Security issues: Security and penetration testing are commonly used across apps handling sensitive user dataÂ
Hard-to-navigate user experience (UX): Pursue usability testing to determine how intuitive the application is for end usersÂ
Low compatibility across devices: Compatibility testing can evaluate how good the app works on different browsers, devices, and OS versionsÂ
There is also the option to choose between manual and automated testing. Â
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. Â
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.Â
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. Â
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.Â
How do businesses measure the effectiveness of software testing?
The effectiveness of the software testing is measured via:Â
Code coverage: The percentage of the code that has been testedÂ
Defect density: The number of defects found per unit of codeÂ
Test case effectiveness: The percentage of test cases that identify defects; helps prune redundant and ineffective testsÂ
Time to detect and fix defects: The time it takes to identify and fix software defects and software bugsÂ
Defect leakage: The number of bugs that "escaped" to production versus those caught during the testing phase Â
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