Top 100 IT Services Companies in California
The Best of December 2025Looking for a top IT services company in California?
For your company to grow, it is essential to choose the best technology. Hiring an innovative IT services provider is the easiest way to ensure that you are making the best use of technology, increasing sales, and staying one step ahead of the competition.
To assist you in your search for a partner, we’ve compiled this list of the top IT consultants in California. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
Jump to Most Reviewed Companies
List of the Best California IT Companies
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$5,000+50 - 249 employeesGaithersburg, MDRead More
DesignDATA is an IT managed services company. Established in 1979, the midsize agency is headquartered in Gaithersburg, Maryland and Washington, District of Columbia. Their services include IT managed services, IT strategy consulting, cloud consulting & SI, and Cybersecurity.
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$1,000+50 - 249 employeesNaperville, ILBetterWorld Technology is a midsize IT managed services company launched in 2003. Their services include IT managed services, Cybersecurity, IT strategy consulting, and Compliance Consulting. The company is headquartered in Naperville, Illinois; Naperville, Illinois; Winter Park, Florida and Denver, Colorado.Read More
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1621$5,000+10 - 49 employeesMountain View, CAAutonomix Innovative Solutions, a big data analytics company, was launched in 2023. They focuses on BI & big data consulting & SI and cloud consulting & SI.Read More
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1622$1,000+10 - 49 employeesLos Angeles, CAChaos Engineering is an IT strategy consulting company. The small Mumbai, India-based team focuses on IT strategy consulting and cloud consulting & SI. The agency was established in 2025.Read More
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1623$250,000+50 - 249 employeesLos Angeles, CARead More
8th Light is a software consultancy firm headquartered in Chicago, with other offices in Los Angeles, New York, and London. The agency and its team of 110+ has experience in web development, custom software development, web design, mobile app development, and cloud consulting.
Clients
Royal Academy of ArtsIndustries
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1624Undisclosed10 - 49 employeesIrvine, CAIntegrated Access Solutions is a CRM consulting and SI company. They provide CRM consulting and SI and unified communications consulting & SI and are headquartered in Irvine, California.Read More
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1625Undisclosed10 - 49 employeesPetaluma, CAEAlchemy is an unified communications consulting & SI company. Based in Petaluma, California, the team provides unified communications consulting & SI and BI & big data consulting & SI.Read More
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1626$5,000+2 - 9 employeesLos Angeles, CALA Creative Technologies is a small IT managed services company. Launched in 2008, the team specializes in IT managed services and IT strategy consulting.Read More
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1627$5,000+2 - 9 employeesSan Diego, CAEndless Technology Solutions is a small IT managed services company founded in 2010. Their services include IT managed services.Read More
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1628$5,000+2 - 9 employeesDavis, CAOnside Technology Solutions, Inc. Is a small Davis, California-based IT managed services company. The team provides IT managed services and IT strategy consulting.Read More
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1629Undisclosed10 - 49 employeesCorona, CAIT strategy consulting and other IT consulting and SI company Onsite Computing, Inc. Was established in 2001. The team offers IT strategy consulting and other IT consulting and SI.Read More
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1630Undisclosed2 - 9 employeesTustin, CAGTI (Googoltech) is a Tustin, California-based IT managed services company. The team provides IT managed services.Read More
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1631Undisclosed50 - 249 employeesIrvine, CASMS Datacenter is an Irvine, California-based IT managed services company. The team specializes in IT managed services and IT strategy consulting.Read More
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1632Undisclosed250 - 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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1633Undisclosed2 - 9 employeesSan Diego, CANetwork Velocity is a small San Diego, California-based CRM consulting and SI company. The team offers CRM consulting and SI and ECM consulting and SI.Read More
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1634$1,000+Freelancer employeesSan Bernardino, CACentrenex, an unified communications consulting & SI company, focus on unified communications consulting & SI and cloud consulting & SI. They were founded in 2015.Read More
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1635$10,000+10 - 49 employeesSan Diego, CAMLS Technology Group, an IT managed services company, was established in 2008. The team offers IT managed services and other IT consulting and SI.Read More
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1636Undisclosed2 - 9 employeesRancho Santa Margarita, CAMotech It Solutions, Inc., an IT managed services company, was established in 2018. Based in Rancho Santa Margarita, California, the team provides IT managed services and Web Design.Read More
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1637$1,000+2 - 9 employeesWest Covina, CAHeadquartered in West Covina, California, LayerZoom is a small IT strategy consulting company. The team offers IT strategy consulting and cloud consulting & SI.Read More
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1638Undisclosed2 - 9 employeesMurrieta, CATriune InfoTech is a cloud consulting & SI company established in 2025. Their team offers cloud consulting & SI and Cybersecurity.Read More
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1639$1,000+2 - 9 employeesWest Hollywood, CASecure Origin is a Cybersecurity and IT managed services company based in West Hollywood, California. They focus on Cybersecurity and IT managed services.Read More
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1640UndisclosedFreelancer employeesLos Angeles, CAAMULET Analytics is a small big data company established in 2012. Their services include BI & big data consulting & SI.Read More
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1641$1,000+2 - 9 employeesRiverside, CAIT managed services company Active IT Solutions was founded in 2003. The team offers IT managed services and Cybersecurity and is in Riverside, California.Read More
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1642UndisclosedFreelancer employeesLos Angeles, CAOn Call Business Communications, an unified communications consulting & SI company, was established in 2020. The team focuses on unified communications consulting & SI and IT managed services.Read More
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1643$1,000+10 - 49 employeesLake Forest, CALoopsey, an IT managed services company, focuses on IT managed services and Cybersecurity. The firm is headquartered in Lake Forest, California.Read More
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1644$25,000+250 - 999 employeesSan Francisco, CAHelpware Tech is a midsize San Francisco, California-based IT strategy consulting company. They provide IT strategy consulting, IT staff augmentation, Custom Software Development, Web Development, and more and were founded in 2015.Read More
Clients
Google Microsoft PWC CompIQIndustries
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1645Undisclosed2 - 9 employeesLos Angeles, CAD3 Legal Search, LLC, a Staffing company, is headquartered in Los Angeles, California. Established in 2010, the team focuses on Staffing and IT managed services.Read More
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1646Undisclosed2 - 9 employeesSignal Hill, CAContuitiv Consulting is a small Business Consulting company headquartered in Signal Hill, California. Their services include Business Consulting and IT strategy consulting.Read More
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1647Undisclosed2 - 9 employeesRedding, CAReverse Focus is a small Marketing Strategy company founded in 2007. Their services include Marketing Strategy and CRM consulting and SI.Read More
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1648Undisclosed2 - 9 employeesLivermore, CAEZ E-File Tax Preparers, an Accounting company, is in Livermore, California. Launched in 2001, the team offers Accounting and IT managed services.Read More
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1649Undisclosed2 - 9 employeesNewport Beach, CAE-commerce development company ConversionPoint Technologies is in Newport Beach, California. Their services include E-Commerce Development and CRM consulting and SI.Read More
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1650Undisclosed2 - 9 employeesIrvine, CAHorizon Consumer Science is a Market Research company located in Irvine, California. Established in 1994, the team offers Market Research and BI & big data consulting & SI.Read More
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Schedule ConsultationMost Reviewed IT Services Company in California
Check out an IT Services Company in California with the most new reviews in the past 12 months.
Most Reviewed
IT Services Company
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