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
6 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.
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
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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
Bellosoft Limited Services
Software Development
UI/UX Design
Web Development
Mobile App Development
eCommerce Development
AI Development
Software Testing
Web Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Most businesses know something is slow or broken. They don't know exactly what to fix, or where AI actually fits. We start there: map your processes, find the highest-ROI automations, then build, run, and help your team adopt them as your ongoing AI automation partner. Certified n8n Expert Partner, Clutch...
Top Services:
AI Development
Mobile App Development
Software Development
CRM Consulting
IT Services
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Location
Tuckahoe, New York
Number of Employees
Under 49
Average Hourly Rate
$80/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
3 Projects Listed
2V Automation Services
AI Development
Mobile App Development
Software Development
CRM Consulting
IT Services
Cloud Consulting
Web Development
Software Testing
UI/UX Design
Business Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
At Evangelist Apps, we go beyond app development, offering IT consultancy and comprehensive digital solutions that are customized to your business goals. Our goal is to deliver effective, customized strategies that fuel growth and align with industry standards...
Top Services:
Mobile App Development
UI/UX Design
IT Services
Staff Augmentation
DevOps Consulting
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Location
Fleet, United Kingdom
Number of Employees
50 - 99
Average Hourly Rate
$49/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
4 Projects Listed
Evangelist Apps Services
Mobile App Development
UI/UX Design
IT Services
Staff Augmentation
DevOps Consulting
Graphic Design
AI Development
VR/AR
Software Development
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Union Bank of Switzerland
British Airways
Hastens Ltd.
BBC
British Gas
Data sourced from the agency's DesignRush profile
Evangelist Apps Reviews & Testimonials
Khushboo Gangarde Review from Google
5.0★
Khushboo Gangarde's Review Sourced from Google
I’m currently working with Evangelist App, and it’s been an amazing experience so far. The environment here is super supportive and creative — I’ve learned so much in a short time. Every day brings a new challenge, and I can genuinely see myself growing, both professionally and personally. The team is great to work with, always open to ideas and feedback. Grateful to be part of such a positive and growth-driven space!
Tamanna Malik Review from Google
5.0★
Tamanna Malik's Review Sourced from Google
Working with Evangelist Apps was a smooth and rewarding experience. The team communicated clearly throughout the project and brought great ideas to the table. They turned my vision into a functional, user-friendly app that exceeded my expectations. If you're looking for a team that delivers on time with top-notch quality, I’d definitely recommend them.
LIPIKA ROY Review from Google
5.0★
LIPIKA ROY's Review Sourced from Google
I had a great experience with Evangelist Apps ! They were professional, knowledgeable & delivered exactly what I wanted. The app they made for me is fantastic and easy to use. I highly recommended them to anyone looking for mobile app development.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
ITWEBS provides full-cycle software development, web and mobile application development, eCommerce platforms, DevOps, integrations, IT support, and dedicated development teams for businesses that need reliable digital solutions...
Top Services:
eCommerce Development
Web Development
Software Testing
Staff Augmentation
Mobile App Development
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Location
Warsaw, Poland
Number of Employees
50 - 99
Average Hourly Rate
$35/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
4 Projects Listed
ITWEBS Services
eCommerce Development
Web Development
Software Testing
Staff Augmentation
Mobile App Development
IT Services
IT Compliance Solution
Software Development
Digital Services
CRM Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
ACME ONE is a Dubai-based technology consulting and software development company helping startups and enterprises build scalable digital products and modernize operations through high-performance software solutions...
Top Services:
AI Development
Web Development
eCommerce Development
Software Development
Mobile App Development
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Location
Dubai, United Arab Emirates
Number of Employees
100 - 249
Average Hourly Rate
$30/hr
Minimal Budget
$10,000 - $25,000
ACME One Services
AI Development
Web Development
eCommerce Development
Software Development
Mobile App Development
Big Data Analytics
Staff Augmentation
Cloud Consulting
Software Testing
DevOps Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Atyantik Technologies Pvt. Ltd. is a leading software company in Vadodara, Gujarat, specializing in innovative digital solutions for clients across India. We offer a wide range of services, from UI/UX Design to enterprise applications, delivering customized, high quality solutions that enhance your digital...
Top Services:
Software Development
CRM Consulting
ERP Consulting
IT Services
SEO
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Location
Vadodara, India
Number of Employees
50 - 99
Average Hourly Rate
$35/hr
Minimal Budget
$10,000 - $25,000
Portfolios Count
1 Project Listed
Atyantik Technologies Private Limited Services
Software Development
CRM Consulting
ERP Consulting
IT Services
SEO
Web Design
Web Development
Software Testing
UI/UX Design
eCommerce Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
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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