Best Software Testing Companies in California
Goodfirms has reviewed 241 Software Testing Companies in California as of September 2026. The top-ranked firm is QA Mentor (5.0 stars, 8 verified reviews, < $25/hr, founded 2010, San Francisco). Across the category, the median hourly rate is $37, median client rating is 4.9, and 56% of firms employ 50+ members. Explore the vetted Software Testing Companies in California below, compare their strengths, and connect with the provider best suited to your requirements.
Searching for software testing service provider companies in California? For startups, outsourcing testing needs help to enter the market without any problems and gives a positive first impression. The new firms also can save on a whole budget of hiring a team by outsourcing an expert team from top testing companies in California. It also helps in building an effective plan for the employees. The professionals help the firm to understand client demands and hence assist in creating the software as per their requirements. Therefore, opting to select from the best testing services in California proves beneficial for startups. Goodfirms, after thorough research of different firms, has made a rundown of the best amongst them. Below is a list of the top software testing companies in California.
Goodfirms has verified 241 Software Testing Companies in California - part of 5,443+ Software Testing Companies, each passing Goodfirms' 4-step verification process (background check, client interviews, portfolio audit, ongoing quality review). Listings marked "Sponsored" are agencies that pay for premium placement - sponsorship does not affect star ratings or review content.
Top 10 at Glance
Compare the highest-ranked firms first side by side.
List of Software Testing service provider companies in California
Sponsored
iOPEX is a new-generation Experience Engineering led digital services provider offering Digital Engineering, Transformation, and Operational services. We are process and technology innovators focused on extracting the best out of the investments you have already made. At iOPEX, we help you realize that golden ratio where your technology and business are in complete synergy, making ... read iOPEX Technologies reviews & insights
iOPEX is a new-generation Experience Engineering led digital services provider offering Digital Engineering, Transformation, and ... read iOPEX Technologies reviews & insights
NA1,000 - 9,9992009San Jose, United States
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San Francisco · $0-24/hr