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.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.
Come as a client, Stay as a friend
We build custom digital products that drive business results, combining strong technical delivery with a deep understanding of business needs. Our team adapts to your working style and helps you make smart technical decisions, speaking a language you'll understand...
Top Services:
- Mobile App Development
- Web Development
- Product Design
- Software Development
- IT Services
- Show more
- Location
- Krakow, Poland
- Number of Employees
- Under 49
- Average Hourly Rate
- $46/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 6 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsCleverCrew Ltd Services
Data sourced from the agency's DesignRush profileClarity Recruitment iLocator GmbH Reppa AB ZerdaLab ClearTech Nokian Tyres Leo E-Reader Xenia AS Mimir Consulting AS Zolitron
CleverCrew Ltd Reviews & Testimonials

Web Development Review from Anders Ă–stlund
CleverCrew is great to work with. I have known the company for four years now and worked together for a year and a half. My favorite is that you can tell them to fix anything, and they will. Not these closed boxes with specialities that have become common among certain developers but instead open minds and a "fix-it, and make it work" attitude.

Mobile App Development Review from Brigitte Granger
CleverCrew was recommended to me by a fellow entrepreneur, and I'm so glad I took their advice. Over the course of building my startup, I worked with at least 10 other developers and agencies, but none came close to the professionalism, experience, skill, and friendliness that CleverCrew brought to the table.The lead developer Tonya was outstanding. She balanced understanding our needs with offering thoughtful recommendations to improve the project. Her communication was excellent, and despite major time zone differences, she ensured we were always aligned and informed at every stage. She also demonstrated strong leadership, managing her team with precision and proactively addressing any issues or questions.We ultimately had to make the difficult decision to shut down company. However, having CleverCrew by our side during this challenging time made the process far less painful. Tonya's support and guidance throughout the closure were invaluable, ensuring everything was wrapped up professionally and efficiently.For anyone looking for a reliable, skilled, and collaborative software development partner - especially a bootstrapped startup - I couldn't recommend CleverCrew more. They set the bar for what a development team should be, and I'm grateful for their role in both building and gracefully guiding me through the closure of our mobile app project. I look forward to working with them again in the future!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsLet's Create Digital Success Together!
Edvantis is a data, AI & software engineering partner with over 400 talented professionals operating in Central & Eastern Europe and the USA...
Top Services:
- Software Development
- AI Development
- Big Data Analytics
- Staff Augmentation
- Mobile App Development
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- Location
- RzeszĂłw, Poland
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $40/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 12 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsEdvantis Services
Data sourced from the agency's DesignRush profileIndeed Kardex Remstar Freenet Group DocCirrus TrustRadius Modulsystem Sweden ATRON COLLENDA SEMDATEX KPC Labs
One Stop Shop for Software Dev, Big Data, AI and Marketing.
We operate with tech teams specialized in designing, developing, testing, deploying and maintaining tailored software to meet the specific needs of its customers, with a range of services related to the software development lifecycle...
Top Services:
- Software Development
- Mobile App Development
- AI Development
- Software Testing
- Big Data Analytics
- Show more
- Location
- Manaus, Brazil
- Number of Employees
- Under 49
- Average Hourly Rate
- $45/hr
- Minimal Budget
- $1,000 - $10,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsKaizen Company Services
Data sourced from the agency's DesignRush profileBemol SENAC Datagro XP Panasonic Technos Logic Pro Silicon Energy
Digital Transformation & IT Solutions Agency
NetClubbed is a Noida-based web development & digital marketing agency offering custom software, WordPress, Shopify, and white-label development. We help startups, SMBs, and agencies worldwide with SEO-driven websites and scalable digital solutions...
Top Services:
- Web Development
- Software Development
- Software Testing
- Web Design
- eCommerce Development
- Show more
- Location
- Noida, India
- Number of Employees
- Under 49
- Average Hourly Rate
- $30/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 3 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsNetclubbed Services
Data sourced from the agency's DesignRush profileArihant Mart Alert Security Services Unicb
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Every agency is independently vetted before it can be listed or ranked
Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.
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
Core services include:Â
- Functional testing Â
- Performance testing Â
- Security testing Â
- Usability testing Â
- Regression testing Â
- Automation testing Â
- Accessibility testing  Â
- Mobile app testing Â
- API testing Â
- Compatibility testing across devices/browsers Â
- Compliance testing Â
- Testing with artificial intelligence (AI) tools
- QA auditÂ
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. 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



