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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91Undisclosed2 - 9 employeesFremont, CACordia Solutions is an Application Testing company. Launched in 2021, the team specializes in Application Testing and BI & big data consulting & SI.Read More
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92Undisclosed10 - 49 employeesOakland, CASoftware development firm and Application Testing company npm, Inc. Is based in Oakland, California. The team specializes in Custom Software Development and Application Testing.Read More
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93$25,000+2 - 9 employeesSan Jose, CAInizio Inc, a small mobile app development company, is based in San Jose, California. Their services include Mobile App Development and Web Development.Read More
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94$10,000+10 - 49 employeesSan Carlos, CAHeadquartered in San Carlos, California, TRG Digital is a custom software development firm. They provide Custom Software Development and Digital Strategy and were established in 2018.Read More
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95$1,000+2 - 9 employeesLos Angeles, CALocated in Los Angeles, California, Ecom Surge is a small Conversion Optimization company. The team offers Conversion Optimization and UX/UI Design.Read More
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96$1,000+2 - 9 employeesMilpitas, CAIOTTAA is a Milpitas, California-based branding company. They specialize in Branding and Search Engine Optimization and were established in 2017.Read More
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97$25,000+50 - 249 employeesNewport Beach, CATechFlex Development, a midsize web development firm, is located in Newport Beach, California. The team provides Web Development and Mobile App Development.Read More
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98Undisclosed50 - 249 employeesOrange, CASQA² is an Application Testing company launched in 1997. The team offers Application Testing and IT strategy consulting and is in Orange, California.Read More
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99Undisclosed50 - 249 employeesCupertino, CAOPTOFIDELITY is an AR/VR development company. Their midsize team of employees is located in Cupertino, California. Their team specializes in AR/VR development and Application Testing.Read More
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100Undisclosed50 - 249 employeesSan Francisco, CATestRigor is an Application Testing company. Established in 2015, the company is based in San Francisco, California. Their team focuses on Application Testing and ERP consulting and SI.Read More
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101Undisclosed50 - 249 employeesSan Francisco, CAFounded in 2012, Rainforest QA, a midsize Application Testing company, is in San Francisco, California. Their services include Application Testing and Artificial Intelligence.Read More
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102Undisclosed50 - 249 employeesRedwood City, CASplit Software, Inc. Is an Application Testing company. They offer Application Testing and Custom Software Development and were launched in 2015.Read More
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103Undisclosed1,000 - 9,999 employeesDiamond Bar, CALiferay is an Application Testing company established in 2004. The large team focuses on Application Testing and API Development.Read More
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104$25,000+1,000 - 9,999 employeesPleasanton, CAQASource, an Application Testing company, is headquartered in Pleasanton, California; Chandigarh, India and Mexico. They focus on Application Testing and were launched in 2000.Read More
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105$5,000+10 - 49 employeesFremont, CATOPSYNTAX INC, a software development firm, is in Fremont, California. They specialize in Custom Software Development and Enterprise App Modernization and were founded in 2018.Read More
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106$5,000+10 - 49 employeesMurrieta, CALaunched in 2006, SYSTELLEX is a social media marketing company. The team offers Social Media Marketing and Search Engine Optimization.Read More
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107Undisclosed10,000+ employeesBurbank, CAHeadquartered in Carmanhall And Leopardstown, Ireland and Burbank, California, Keywords Studios is a large video production agency. The team provides Video Production and Mobile App Development.Read More
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108$10,000+10 - 49 employeesOakland, CARead More
Founded in 2021, Nimi Tech Limited is a small software development firm based in Oakland, California; Colombo, Sri Lanka and Chennai, India. Their services include custom software development, web development, mobile app development, IT staff augmentation, and more.
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109$250,000+1,000 - 9,999 employeesSanta Clara, CAInfostretch is a large Application Testing company headquartered in Santa Clara, California and New York, New York. Their services include Application Testing and Enterprise App Modernization.Read More
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110Undisclosed250 - 999 employeesFremont, CAAgama Solutions Inc is an Application Testing company. The Fremont, California-based company was launched in 2006. Their services include Application Testing and IT strategy consulting.Read More
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111Undisclosed2 - 9 employeesSan Diego, CAHurrikan Logic is a small SEO company launched in 2013. Their services include Search Engine Optimization and UX/UI Design.Read More
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112$25,000+50 - 249 employeesBeverly Hills, CASoftware development company AIM Tech AI was founded in 1999. The midsize Beverly Hills, California-based team offers custom software development, web development, mobile app development, and application testing.Read More
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113$5,000+10 - 49 employeesSan Francisco, CABased in San Francisco, California, Surge Tech Partners is a mobile application development company. Their services include Mobile App Development and Web Development.Read More
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114Undisclosed50 - 249 employeesSan Jose, CACAXTEK is a custom software development firm. The team is headquartered in San Jose, California, and their services include Custom Software Development and Application Testing.Read More
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115$10,000+50 - 249 employeesLos Angeles, CARead More
Web design agency DigiNeat Smart Technologies was established in 2024. Their midsize team is in Los Angeles, California and Yerevan, Armenia. Their services include Web Design, UX/UI Design, Web Development, Mobile App Development, and more.
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116$5,000+2 - 9 employeesFremont, CACloud consulting & SI company CLARITY TECH LLC focuses on cloud consulting & SI and Custom Software Development. They were founded in 2022.Read More
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117$25,000+2 - 9 employeesIrvine, CACybersecurity company GoatBytes.IO is located in Irvine, California. Their services include Cybersecurity and Mobile App Development.Read More
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118Undisclosed10 - 49 employeesPalo Alto, CALoadmill, an Application Testing company, was established in 2018. The small team offers Application Testing.Read More
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119Undisclosed10 - 49 employeesLos Altos, CAPractical SQA, an Application Testing company, is located in Los Altos, California. Their services include Application Testing and Mobile & App Marketing.Read More
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120Undisclosed10 - 49 employeesWoodland, CAVarkasa Inc is an Application Testing company based in Woodland, California. Their services include Application Testing and IT strategy consulting.Read More
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