Top 100 Software Testing Companies in California
The Best of April 2026Looking 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 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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61$5,000+10 - 49 employeesIrwindale, CAEstablished in 2019, ProfSquad is an Application Testing company. Their small team is in Irwindale, California and specializes in Application Testing and Conversion Optimization.Read More
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DripHydrationIndustries
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62$1,000+50 - 249 employeesLos Angeles, CAAppinventors INC is a mobile application development firm founded in 2014. The team specializes in Mobile App Development and IT staff augmentation and is headquartered in Los Angeles, California.Read More
Clients
Jubilant FoodWork Subway Follett CleverIndustries
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63$10,000+50 - 249 employeesPleasanton, CA12th Wonder is a cloud consulting & SI company founded in 2012. Based in Pleasanton, California, the team offers cloud consulting & SI and Mobile App Development.Read More
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64$1,000+250 - 999 employeesFremont, CAElsner Store is a Fremont, California-based IT strategy consulting company. The team offers IT strategy consulting and Pay Per Click.Read More
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65$1,000+10 - 49 employeesSan Jose, CAConverter Tools is a Direct Marketing company. Their small team of employees is headquartered in San Jose, California and Noida, India. Their team specializes in Direct Marketing and Market Research.Read More
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66$5,000+2 - 9 employeesFresno, CAJETS Tech., LLC is a custom software development company. Based in Fresno, California, the firm focuses on Custom Software Development and Web Development.Read More
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67$5,000+250 - 999 employeesIrvine, CAPreludeSys is an Enterprise App Modernization company. The team is in Irvine, California and Chennai, India, and their services include Enterprise App Modernization and Artificial Intelligence.Read More
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68$50,000+250 - 999 employeesSan Diego, CAArkusNexus is an IT staff augmentation company. In San Diego, California and Irvine, California, the company focuses on IT staff augmentation and Custom Software Development.Read More
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69$1,000+2 - 9 employeesCulver City, CALocated in Culver City, California, Bright Defense, LLC. Is a Cybersecurity company. Their services include Cybersecurity and IT managed services.Read More
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70Undisclosed50 - 249 employeesCampbell, CAApplication Testing and Robotics Process Automation company Resolve Systems was launched in 2014. The team focuses on Application Testing and Robotics Process Automation.Read More
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71Undisclosed1,000 - 9,999 employeesSan Jose, CASpirent Communications is a Cybersecurity company in San Jose, California and Beijing, China. They offer Cybersecurity and IT managed services and were launched in 1936.Read More
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72Undisclosed50 - 249 employeesChico, CAShasta QA , an Application Testing company, was launched in 2002. The midsize team offers Application Testing and Custom Software Development.Read More
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73Undisclosed50 - 249 employeesSan Francisco, CAEppo, Inc. Is an artificial intelligence company and Application Testing company. The San Francisco, California-based team focuses on Artificial Intelligence and Application Testing.Read More
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74Undisclosed50 - 249 employeesIrvine, CAApplication Testing and AI Agents company Emergence AI was founded in 2018. The team specializes in Application Testing and AI Agents.Read More
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75$1,000+10 - 49 employeesPleasanton, CAKlystron is a SEO services firm. Their team is headquartered in Pleasanton, California. The firm specializes in Search Engine Optimization and Custom Software Development.Read More
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76$5,000+2 - 9 employeesDanville, CALaunched in 1999, DLS Solutions, Inc. Is a custom software development company. Their team provides Custom Software Development and UX/UI Design.Read More
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77$1,000+50 - 249 employeesSan Francisco, CAACCELQ is a branding company. The team is headquartered in San Francisco, California, and their services include Branding and Custom Software Development.Read More
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78$10,000+10 - 49 employeesSan Francisco, CATheBlockBox is a Blockchain company founded in 2018. Their team provides Blockchain and Custom Software Development.Read More
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79$5,000+10 - 49 employeesCarlsbad, CAEstablished in 2019, Scleraworx is an IT managed services company. The agency provides IT managed services and Web Development.Read More
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80Undisclosed10 - 49 employeesFair Oaks, CALaunched in 2006, BG Software is a Cybersecurity company. The agency provides Cybersecurity and Custom Software Development.Read More
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81$10,000+10 - 49 employeesOrange, CATechnosys Solutions, a software development firm, was established in 2006. The agency offers Custom Software Development and Web Development.Read More
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82$1,000+50 - 249 employeesEastvale, CATechcedence Infosystems Pvt Ltd is a cloud consulting & SI company. Located in Gounder Mills, India and Eastvale, California, the team focuses on cloud consulting & SI and IT staff augmentation.Read More
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83$10,000+2 - 9 employeesLos Angeles, CABadFeatures is an UX company. The Los Angeles, California-based agency was launched in 2015. Their services include UX/UI Design and Web Development.Read More
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84$1,000+50 - 249 employeesSanta Clara, CAGoognu data service pvt. Ltd is a business intelligence company. The Santa Clara, California-based firm focuses on BI & big data consulting & SI and cloud consulting & SI.Read More
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85$50,000+1,000 - 9,999 employeesSan Francisco, CAVention is an IT staff augmentation company. Their large team is in New York, New York; London, England; Marietta, Georgia and San Francisco, California. The company focuses on IT staff augmentation, Custom Software Development, Web Development, Mobile App Development, and more. The company was launched in 2002.Read More
Clients
IBM PayPal pwc IC MarketsIndustries
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86$25,000+50 - 249 employeesSan Francisco, CAFounded in 2012, nClouds Inc. Is a midsize Microservices Architecture Services company. Their team offers Microservices Architecture Services and BI & big data consulting & SI.Read More
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87Undisclosed250 - 999 employeesFremont, CAHeadquartered in Fremont, California, SoftSol is a midsize Application Testing company. The team provides Application Testing and BI & big data consulting & SI.Read More
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88Undisclosed250 - 999 employeesSan Francisco, CAAmplitude is a big data company founded in 2012. In San Francisco, California, the team offers BI & big data consulting & SI and Application Testing.Read More
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89$1,000+2 - 9 employeesLos Angeles, CAGrafx apps is a website development company. Founded in 2019, the team offers Web Development and UX/UI Design.Read More
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90$5,000+10 - 49 employeesSanta Monica, CASoftware development company v is based in Santa Monica, California. Their services include Custom Software Development and UX/UI Design.Read More
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