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Top Software Testing Companies in California

by Mack G
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top software testing companies california

California, often referred to as the “Golden State,” is not only known for its stunning landscapes and thriving tech industry but also for being home to some of the most innovative and influential software testing companies in the world.

These companies play a crucial role in ensuring the reliability and functionality of software applications, contributing to the success of countless businesses across various industries. In this article, we will explore the top software testing companies in California, their services, and the impact they have on the global technology landscape.

List of Software Testing Service Provider Companies in California

Indium Software

Indium Software is a fast-growing Digital Engineering company, focused on building modern solutions across Applications, Data, and Gaming for its clients. With deep expertise in next-gen offerings combining data and applications, Indium offers a wide range of services including Product Engineering, Low-Code development, Data Engineering, Ai/ML, Digital Assurance, and end-to-end Gaming services.

Over the past two decades, Indium has built deep relationships with Fortune 500, Global 2000, as well as born-digital companies across industries such as BFSI, Healthcare, Manufacturing & Retail, and Digital Native & Technology — in North America, India, Europe, and APAC. It has also built strong partnerships with leading hyperscalers, low-code, and data partners such as AWS, Azure, GCP, Mendix, Striim, and Databricks.

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For accelerating and driving innovative solutions at scale, Indium has developed strong intellectual properties such as teX.ai, which automates the text analytics lifecycle by leveraging ML, NLP, and Gen AI; ibriX, a pre-built accelerator for Databricks implementation lifecycle; uphoriX, a smart test automation platform; iDAF, an accelerator for end-to-end Data validation Indium has about 3,000 associates globally and is widely known for its meritocratic workplace culture and continuous learning through its in-house learning centre, Indium Academy, earning it the coveted recognition of a Great Place To Work™.


Qualitest is a leading software testing and quality assurance company with a global presence and a strong foothold in California. With a team of highly skilled professionals, Qualitest offers a wide range of testing services, including functional testing, automation testing, performance testing, security testing, and more. They work with a diverse clientele, spanning industries like finance, healthcare, e-commerce, and beyond. Their commitment to quality and innovation has made them a trusted partner for businesses worldwide.

EPAM Systems

EPAM Systems, headquartered in California, is a multinational software engineering and IT consulting company. While not exclusively a software testing company, EPAM excels in quality assurance services. They offer end-to-end testing solutions to help businesses optimize their software development processes. With a focus on automation and continuous testing, they ensure that their clients’ software products are of the highest quality.


QASource is a California-based software testing company renowned for its comprehensive quality assurance and testing services. They provide expertise in various testing domains, including manual and automated testing, performance testing, security testing, and mobile app testing. With their customer-centric approach and a dedicated team of testers, QASource is a trusted partner for businesses looking to enhance the quality and reliability of their software applications.


Testlio is a software testing and quality assurance company with a presence in California, specializing in mobile app testing. They have earned a reputation for their meticulous testing processes and user-centric approach. Testlio offers a crowdtesting platform that allows companies to access a global community of testers to ensure their mobile applications meet high standards of quality.


TestRocker is a software testing company in California known for its expertise in test automation and continuous testing. They help businesses streamline their testing processes and increase the efficiency of their software development cycles. By leveraging cutting-edge automation tools, TestRocker delivers faster and more reliable software testing services.


99tests is a crowdtesting platform based in California, offering a unique approach to software testing. They provide access to a global community of freelance testers, allowing businesses to receive feedback from real users. This approach ensures that software applications are thoroughly tested from a user’s perspective, making 99tests a valuable asset for companies aiming for a user-centric approach to quality assurance.


Applitools, with its California presence, focuses on visual testing and automation for applications with graphical user interfaces. Their AI-powered visual testing platform ensures that applications appear correctly and consistently across various devices and browsers. Applitools’ innovative approach to quality assurance has garnered them recognition in the tech industry.


TestPros is a California-based software testing company with a specialization in cybersecurity and information assurance testing. They work primarily with government and military organizations, helping them ensure the security and reliability of their software systems. TestPros’ dedication to cybersecurity makes them a valuable player in the tech landscape.

Cigniti Technologies

Cigniti Technologies, though headquartered in India, has a significant presence in California and is a global leader in software testing and quality assurance. They offer an extensive range of testing services, including functional, performance, and security testing. With their innovative testing solutions, Cigniti has made a substantial impact on businesses across the world.


California’s software testing companies are at the forefront of ensuring the quality and reliability of software applications that power businesses and industries globally. These companies, with their expertise and innovative approaches to testing, play a pivotal role in the success of software development projects.

By partnering with these top software testing companies, businesses can harness their capabilities to deliver high-quality software products, gain a competitive edge, and meet the ever-increasing demands of the tech-savvy market. Whether it’s through crowdtesting, automation, security, or performance testing, California’s software testing companies continue to shape the future of the tech industry.

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