Top 100 Software Testing Companies in California
The Best of December 2025Looking for a top software QA company in California?
Hiring a software testing company is a necessity to both test and improve the services your company offers, especially in an increasingly digital world.
To assist you in your search for a partner, we’ve compiled this list of the top software testing companies in California. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best California Software QA Companies
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$5,000+50 - 249 employeesCluj-Napoca, RomaniaRead More
BetterQA is an Application Testing company. Their midsize team is located in Cluj-Napoca, Romania. Their services include Application Testing, other IT consulting and SI, and Application Management & Support. The company was launched in 2018.
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$5,000+50 - 249 employeesSeattle, WARead More
QA Wolf, an application testing company, was launched in 2019. The company provides application testing and has a small team.
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121Undisclosed10 - 49 employeesSan Francisco, CAEstablished in 2016, Intellimize is an Application Testing company. The company specializes in Application Testing and Conversion Optimization.Read More
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122Undisclosed250 - 999 employeesSanta Clara, CATech Firefly is a Content Moderation Services company. The Santa Clara, California-based agency was launched in 2016. Their team offers Content Moderation Services and Artificial Intelligence.Read More
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123Undisclosed250 - 999 employeesCulver City, CACustom software development firm Test Pro is located in Culver City, California. The team specializes in Custom Software Development and Application Testing.Read More
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124Undisclosed250 - 999 employeesSanta Clara, CAEffOne is a custom software development firm based in Santa Clara, California. They focus on Custom Software Development and Application Testing.Read More
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125Undisclosed250 - 999 employeesSanta Clarita, CAKRG Technologies Inc. Is an Application Testing company. The Santa Clarita, California-based agency focuses on Application Testing and BI & big data consulting & SI.Read More
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126Undisclosed1,000 - 9,999 employeesSanta Clara, CAApexon is a big data company. They are located in Santa Clara, California and have large team. Their services include BI & big data consulting & SI and IT managed services.Read More
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127Undisclosed1,000 - 9,999 employeesFolsom, CAAgreeYa Solutions is a web design company. The team offers Web Design and UX/UI Design and is in Folsom, California.Read More
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128Undisclosed50 - 249 employeesIrvine, CAMSB Docs is an Irvine, California-based cloud consulting & SI company. The team offers cloud consulting & SI and Application Testing.Read More
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129Undisclosed2 - 9 employeesSimi Valley, CATieche Inc is an Application Testing company headquartered in Simi Valley, California. Established in 2011, the team specializes in Application Testing and Corporate Training & Coaching.Read More
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130$5,000+10 - 49 employeesSacramento, CASmall mobile app development company TechloSet, is located in Faisalabad, Pakistan and Sacramento, California. Their services include Mobile App Development and Custom Software Development.Read More
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131Undisclosed10 - 49 employeesSanta Clara, CABatchTest is a small Product Design company launched in 2005. Their team specializes in Product Design and Application Testing.Read More
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132Undisclosed10 - 49 employeesLos Angeles, CASierra Labs is an Application Testing company. Established in 2017, the team provides Application Testing and Compliance Consulting.Read More
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133Undisclosed10 - 49 employeesSan Diego, CAAdvantu is an Application Testing company. Their small team of employees is based in San Diego, California. Their team offers Application Testing and Custom Software Development.Read More
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134Undisclosed10 - 49 employeesMenlo Park, CAWireMock, a small API Development company, is in Menlo Park, California. The team provides API Development and cloud consulting & SI.Read More
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135Undisclosed10 - 49 employeesSan Francisco, CABased in San Francisco, California, Optimal is a website development firm. Established in 2015, the team focuses on Web Development and Application Testing.Read More
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136Undisclosed10 - 49 employeesSan Francisco, CAFounded in 2013, Apptimize is an Application Testing company. The team provides Application Testing and Application Management & Support and is headquartered in San Francisco, California.Read More
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137Undisclosed50 - 249 employeesSan Jose, CABetaSoft Inc. Is a cloud consulting & SI company. Their midsize team of employees is based in San Jose, California. Their team provides cloud consulting & SI and Application Testing.Read More
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138Undisclosed1,000 - 9,999 employeesLos Angeles, CAEmids is a Business Consulting company founded in 1999. Their services include Business Consulting and Generative AI.Read More
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139Undisclosed2 - 9 employeesCarlsbad, CALaunched in 2020, QADeputy is an Application Testing company. The team provides Application Testing and API Development.Read More
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140Undisclosed10 - 49 employeesPasadena, CA3QC is an Application Testing company. Their team is headquartered in Pasadena, California and offers Application Testing.Read More
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141Undisclosed2 - 9 employeesBrisbane, CAHeadquartered in Brisbane, California, Automated NSW is an Application Testing company. They specialize in Application Testing and were established in 2022.Read More
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142Undisclosed10 - 49 employeesSan Francisco, CAProdPerfect, a small Application Testing company, is headquartered in San Francisco, California. The team offers Application Testing.Read More
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143Undisclosed2 - 9 employeesIrvine, CAQA Camp is an Application Testing company. They were launched in 2018, and their services include Application Testing.Read More
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144Undisclosed10 - 49 employeesMilpitas, CACrosslynx US LLC, a custom software development firm, is located in Milpitas, California. They offer Custom Software Development and Application Testing.Read More
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145$10,000+50 - 249 employeesSan Mateo, CAG360Technologies is a custom software development firm. Established in 2010, the team provides Custom Software Development, Generative AI, Application Testing, Application Management & Support, and more. Their midsize company is located in San Mateo, California and Montevideo, Uruguay.Read More
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146Undisclosed10 - 49 employeesMilpitas, CAQatronix is an Application Testing company. They are headquartered in Milpitas, California and have small team. Their team offers Application Testing and UX/UI Design.Read More
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147Undisclosed50 - 249 employeesAnaheim, CAUB Technology Innovations (UBTI) is a cloud consulting & SI company. The Anaheim, California-based team focuses on cloud consulting & SI and Custom Software Development.Read More
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148Undisclosed50 - 249 employeesSan Jose, CAInfobahn Softworld Inc is a cloud consulting & SI company. The agency is based in Toronto, Canada and San Jose, California. Their team focuses on cloud consulting & SI and Application Testing.Read More
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149Undisclosed50 - 249 employeesDublin, CAFounded in 2014, InnovaPath Inc is a midsize UX design agency. Their team focuses on UX/UI Design and cloud consulting & SI.Read More
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150Undisclosed1,000 - 9,999 employeesSunnyvale, CAXoriant is an UX agency launched in 1990. The company offers UX/UI Design and BI & big data consulting & SI, and is large.Read More
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