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Nad Al Sheba, Dubai, UAE

Page 2 - Top Software Testing companies in California, United States | PrimeFirms

Top Software Testing Companies

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Discover top-rated Software Testing companies. We've handpicked experienced companies that specialize in delivering high-quality solutions for startup...Read More

List of Top Software Testing Companies

Rankings updated: Oct 22, 2026

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Chiron LLC

Unclaimed

Chiron LLC is the IT Consulting Company which focuses on the Web Development; Custom Web and Mobile Solutions built on OutSystems; Building Collaboration environments with Business Processes automation and integration of different application between each other. [... view Chiron LLC profile ]

Top Services:

Software Testing

Irvine, United States

Under 49

$106/hr

$10,000 - $25,000

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0.0

0 reviews

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QA Genesis

Unclaimed

QA Genesis is an Application Testing company established in 2014. Their services include Application Testing.Read more

Top Services:

Software Testing

Torrance, United States

50 - 249

$25/hr

$1,000+

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0.0

0 reviews

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Orangesoft

Unclaimed

Orangesoft is a full-cycle software development partner focused on healthcare. [... view Orangesoft profile ]

Top Services:

Software Testing

San Francisco, United States

100 - 249

$50/hr

$25,000 - $50,000

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0.0

0 reviews

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Developer Partners

Unclaimed

Dynamic custom software development company specialized in building ERP, CRM, ATS, CMS, and e-commerce solutions. Our technology stack is .NET, SQL, Entity Framework, Angular, and Typescript. [... view Developer Partners profile ]

Top Services:

Software Testing

Los Angeles, United States

Under 49

$50/hr

$1,000 - $10,000

PrimeFirms Score

0.0

0 reviews

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CodeStringers

Unclaimed

CodeStringers is an uncommon software development firm that brings innovation, craftsmanship, and integrity to the development of best-in-class cloud, web and mobile software products. We provide end-to-end product strategy, release planning, software development and quality assurance solutions. [... see all CodeStringers reviews ]

Top Services:

Software Testing

Santa Cruz, United States

50 - 99

$55/hr

$50,000 & Up

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0.0

0 reviews

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Tempest House

Unclaimed

Tempest House is a full service agency helping clients all over the world build cutting edge software with our expert team of developers, designers and managers. Rigorous QA processes, excellent communications and a commitment to meeting timelines characterises our company best. [... view Tempest House profile ]

Top Services:

Software Testing

Carpinteria, United States

50 - 99

$40/hr

$1,000 - $10,000

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0.0

0 reviews

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Techjays

Unclaimed

Our focus is on providing businesses with the tools they need to reach their maximum potential through the use of our cutting-edge software solutions. Launch your product to market 2x faster with Techjay's strong business domain experience, technical expertise, extensive knowledge of the latest industry [... view Techjays profile ]

Top Services:

Software Testing

Menlo Park, United States

50 - 99

$28/hr

$10,000 - $25,000

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0.0

0 reviews

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Sunset Systems

Unclaimed

Sunset Systems is a California-based technology firm specializing in custom IT solutions, including mobile and web application development, machine learning, and system integration. With a focus on delivering tailored services, the company partners with clients across various industries to bring their digital [... view Sunset Systems profile ]

Top Services:

Software Testing

Los Angeles, United States

100 - 249

$50/hr

$50,000 & Up

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0.0

0 reviews

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Powerphrase

Unclaimed

We at PowerPhrase Web Design Services provide performance testing, responsive web design services aimed at crafting websites that will remain aesthetically pleasing & user-friendly, regardless of the platform being used. [... view Powerphrase profile ]

Top Services:

Software Testing

Santa Ana, United States

Under 49

$75/hr

$1,000 - $10,000

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0.0

0 reviews

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Light IT

Unclaimed

Light IT provides the following services on the global tech market:- consulting clients on IT products and services- custom product and software development- provision of resources at the clients' request- software delivery and maintenance- software quality assurance [... see all Light IT reviews ]

Top Services:

Software Testing

San Jose, United States

100 - 249

$40/hr

$10,000 - $25,000

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0.0

0 reviews

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Innoflexion Technologies

Unclaimed

Launched in 2016, Innoflexion Technologies is a midsize San Jose, California-based Application Testing company. Their services include Application Testing.Read more

Top Services:

Software Testing

San Jose, United States

50 - 249

$2549/hr

$50,000+

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0.0

0 reviews

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ITRex Group

Unclaimed

ITRex delivers end-to-end AI and data solutions from strategic planning to real-world deployment. The companys expertise spans LLM integration, RAG, copilots, SLMs, and autonomous AI agents, all engineered for reliability and scale. [... see all ITRex Group reviews ]

Top Services:

Software Testing

Aliso Viejo, United States

250 - 499

$50/hr

$50,000 & Up

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0.0

0 reviews

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pCloudy

Unclaimed

PCloudy, an Application Testing company, is in Dublin, California. Established in 2015, the team offers Application Testing.Read more

Top Services:

Software Testing

Dublin, United States

50 - 249

$1,000+

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0.0

0 reviews

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Mindful QA

Unclaimed

Mindful QA, based in the USA, offers on-demand software testing services by an all-American team. With expertise in manual, automated, performance testing, and UX consulting, we've worked with clients like Google, Microsoft, Hulu, and Zillow. Our commitment to responsibility includes being carbon-neutral and [... view Mindful QA profile ]

Top Services:

Software Testing

Los Angeles, United States

50 - 99

$1,000 - $10,000

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0.0

0 reviews

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Thought Frameworks

Unclaimed

Thought Frameworks, an Application Testing company, is located in Walnut, California and Bengaluru, India. Their services include Application Testing.Read more

Top Services:

Software Testing

Walnut, United States

50 - 249

Undisclosed

PrimeFirms Score

0.0

0 reviews

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Spiral QA

Unclaimed

Application Testing company Spiral QA is in San Francisco, California. They offer Application Testing.Read more

Top Services:

Software Testing

San Francisco, United States

10 - 49

Undisclosed

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0.0

0 reviews

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Sauce Labs

Unclaimed

Sauce Labs is an Application Testing company. The San Francisco, California-based team offers Application Testing.Read more

Top Services:

Software Testing

San Francisco, United States

250 - 999

Undisclosed

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0.0

0 reviews

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Performance Lab

Unclaimed

Performance Lab is an Application Testing company launched in 2008. Their team focuses on Application Testing.Read more

Top Services:

Software Testing

San Jose, United States

250 - 999

Undisclosed

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0.0

0 reviews

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Parasoft

Unclaimed

Parasoft is an Application Testing company. The Monrovia, California-based company specializes in Application Testing.Read more

Top Services:

Software Testing

Monrovia, United States

250 - 999

Undisclosed

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0.0

0 reviews

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CyberTest

Unclaimed

CyberTest is an autonomous firm specializing in security testing, research, and development, providing expert consultancy services and cutting-edge tools to fortify organizations and businesses in safeguarding their assets. Our comprehensive suite of offerings aids in bolstering security measures and [... view CyberTest profile ]

Top Services:

Software Testing

Burbank, United States

Under 49

$1,000 - $10,000

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0.0

0 reviews

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Fibonalabs

Unclaimed

Fibonalabs deploys technology to unveil value-oriented processes and craft innovative solutions for every business. From offering world-class user experience and digital product development to implementing strategy and technology, we help you gain a sharp competitive edge in the industry. [... view Fibonalabs profile ]

Top Services:

Software Testing

Long Beach, United States

50 - 99

$50/hr

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0.0

0 reviews

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inVerita

Unclaimed

inVerita is a 150 engineers custom software and staff augmentation company that delivers custom healthcare software, pharmacy and medical(IoT), web(.NET/Node.js), mobile solutions(React-Native), and QA. Headquartered in Lviv, Ukraine, and is present in Krakow, New York and the Bay Area. [... view InVerita profile ]

Top Services:

Software Testing

San Francisco, United States

100 - 249

PrimeFirms Score

0.0

0 reviews

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QASource, Inc

Unclaimed

QASource, based in Pleasanton, CA, offers a comprehensive suite of software testing solutions to meet diverse needs. With a focus on precision and innovation, QASource is a strategic partner in ensuring software quality and reliability. The agency's expertise spans various testing methodologies and [... view QASource, Inc profile ]

Top Services:

Software Testing

Pleasanton, United States

Under 49

PrimeFirms Score

0.0

0 reviews

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Services Related to Software Testing

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Frequently asked questions

Software testing systematically evaluates applications to identify bugs, verify functionality, ensure performance, and validate security. Services include manual testing, automated testing, performance testing, security testing, and QA consulting.

Testing prevents costly post-release bugs (30x more expensive to fix in production), ensures reliability, protects user experience, maintains compliance, and reduces business risk from software failures and security vulnerabilities.

Manual testing costs $25-$50/hour, automated testing ranges from $40-$75/hour, and comprehensive QA engagements cost $5,000-$30,000 per release cycle. Ongoing testing retainers range from $3,000-$15,000/month.

Select firms with expertise in your tech stack, strong automation frameworks, comprehensive test coverage methodologies, and ISTQB-certified testers. Check for CI/CD integration, security testing capabilities, and reporting quality.

Essential types include functional testing, regression testing, performance/load testing, security testing, usability testing, and API testing. Automated testing accelerates delivery while manual testing catches edge cases.

Top Software Testing Companies

List of Top Software Testing Companies

Ready to Find Your Perfect Agency?

Are You a Top Agency?

Chiron LLC

QA Genesis

Orangesoft

Developer Partners

CodeStringers

Tempest House

Techjays

Sunset Systems

Powerphrase

Light IT

Innoflexion Technologies

ITRex Group

pCloudy

Mindful QA

Thought Frameworks

Spiral QA

Sauce Labs

Performance Lab

Parasoft

CyberTest

Fibonalabs

inVerita

QASource, Inc

Services Related to Software Testing

Latest Insights

Frequently asked questions

What is software testing?

Why is software testing important?

How much do software testing services cost?

How do I choose the best software testing company?

What types of software testing are essential?