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.
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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91$1,000+2 - 9 employeesSacramento, CARead More
Founded in 2009, John Brendle IT Consulting is a IT managed services company. Their small team is based in Sacramento, California and specializes in IT managed services, IT strategy consulting, and cybersecurity.
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92$1,000+10 - 49 employeesThousand Oaks, CARead More
Giant Partners, a direct marketing company, was founded in 2005. They are in Thousand Oaks, California and have a small team. Giant Partners provides direct marketing, search engine optimization, and conversion optimization.
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BMW MetLife Ohio State HPIndustries
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93$5,000+10 - 49 employeesCosta Mesa, CARead More
Breeze IT, Inc. is an IT solutions provider based in Costa Mesa, Calif. The provider, founded in 2010, has a team of more than 15 that provides IT managed services, cybersecurity, cloud consulting & SI, IT strategy consulting, and IT staff augmentation services. Breeze IT serves midmarket and other-sized companies in various industries that include manufacturing, business services, and real estate.
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OSTechnicalIndustries
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94Undisclosed10 - 49 employeesRiverside, CAStudio 12 is a small software development firm headquartered in Riverside, California. They focus on Custom Software Development, Web Development, Mobile App Development, cloud consulting & SI, and more and were launched in 2013.Read More
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95$10,000+2 - 9 employeesOakland, CARead More
State Creative is a web design and development company located in Oakland, CA. Founded in 2000, State Creative's team of nearly 10 employees also offer e-commerce development. They serve small and mid-market businesses in the business services, finance, and consumer products industries.
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MarsVenusIndustries
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96$5,000+10 - 49 employeesLos Angeles, CARead More
PortalFront is a SharePoint hosting provider founded in 2003. Based in Riverside, Calif., their team of under 50 employees specializes in ECM consulting and SI, IT strategy consulting, and cloud consulting and SI.
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XeroxIndustries
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97$10,000+10 - 49 employeesDelano, CARead More
iOPTIME is a Salesforce consultancy and web & mobile solutions company based in Islamabad, Pakistan. The company, founded in 2012, has a team of more than ten that provides CRM consulting & SI, mobile app development, IoT development, web development, and AI services. iOPTIME serves small and mid-market companies in the IT; consumer products & services; health care & medical; education; and GPS, navigation, & GIS industries.
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TELUS CommuncationsIndustries
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98$25,000+10 - 49 employeesSan Francisco, CARead More
Cylogy Inc. Is a website development firm. They are located in San Francisco, California and have a small team that provides web development, application management & support, digital strategy, IT strategy consulting, and more. The company was founded in 2001.
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99$50,000+50 - 249 employeesSan Francisco, CAAdmios, a software development firm, was launched in 2005. The company provides Custom Software Development, IT staff augmentation, IT managed services, Application Testing, and more and has a midsize team. The company is in San Francisco, California.Read More
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100$25,000+2 - 9 employeesRedlands, CAFounded in 2016, Hounder is a branding agency. The small Redlands, California-based team focuses on Branding, Search Engine Optimization, Pay Per Click, UX/UI Design, and more.Read More
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101$1,000+2 - 9 employeesTrabuco Canyon, CAWest Coast Network Solutions is an IT managed services company located in Trabuco Canyon, California. The small team offers IT managed services, IT strategy consulting, unified communications consulting & SI, Cybersecurity, and more and was founded in 2015.Read More
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102$1,000+2 - 9 employeesGlendale, CARead More
TECHBLEED is a managed service provider based in Glendale, Calif. with more than two experts. Founded in 2019, they specialize in IT strategy consulting, IT managed services and cybersecurity solutions for small and mid-market firms across various industries.
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Advanced NutrientsIndustries
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103$1,000+2 - 9 employeesLong Beach, CARead More
Adalane Media Group is a small social media marketing firm. They specialize in social media marketing, pay per click, and digital strategy and were founded in 2019.
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104$10,000+50 - 249 employeesCampbell, CARead More
USWired Inc. is an IT services provider based in San Jose, Calif. Founded in 1996, their current team of 16 specializes in IT managed services, cloud consulting & SI, and IT strategy consulting.
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NYSEIndustries
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105$1,000+2 - 9 employeesFountain Valley, CARead More
IT Tropolis, an IT managed services company, is in Fountain Valley, California. The small team specializes in IT managed services, IT strategy consulting, cloud consulting & SI, and cybersecurity. The company was founded in 2010.
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106$10,000+10 - 49 employeesSanta Monica, CARead More
SM Innovations is a cloud consulting and SI firm based in Santa Monica, Calif. Founded in 2018, their team of 30 serves clients in the IT services sector. Services include web development and UI/UX design.
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NikeIndustries
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107$5,000+10 - 49 employeesLos Angeles, CARead More
Nexplay Consulting Inc. Is an IT managed services company. The small team is headquartered in Los Angeles, California and Fullerton, California. Their services include IT managed services, cybersecurity, IT strategy consulting, and other IT consulting and SI.
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108$1,000+10 - 49 employeesFair Oaks, CARead More
Founded in 1997, FUSE3 is an IT managed services company. In Fair Oaks, California, their small team provides IT managed services.
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109$50,000+10 - 49 employeesIrvine, CARead More
Company A is a custom application development company based in Irvine, Calif., with offices in Plano, Texas, and Novi Sad, Serbia. The company, founded in 2015, has a team of more than ten that provides cloud consulting & SI, custom software development, web development, mobile app development, and enterprise app modernization services. Company A serves small and larger-sized companies in various industries, including IT, financial services, and health care & medical.
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110$25,000+10 - 49 employeesSan Diego, CARead More
Website development firm Alliance Innovations is located in San Diego, California. The small agency was founded in 2019. Their team focuses on web development, digital strategy, custom software development, mobile app development, and more.
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111$50,000+10 - 49 employeesSan Diego, CARead More
Achieve Internet is a software development company that's headquartered in San Diego; they have another office in Los Angeles. Founded in 2002, Achieve Internet does web development, enterprise content management, sales intelligence, enterprise app modernization, CRM consulting, and e-commerce development. Clients are mostly midmarket companies and in the healthcare and arts and entertainment sectors. They have about 41 employees.
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DexcomIndustries
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112$10,000+10 - 49 employeesSan Francisco, CARead More
Custom software development company Singula team was founded in 2022. The small team specializes in custom software development, web development, CRM consulting and SI, ERP consulting and SI, and more. The firm is in San Francisco, California.
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113$1,000+2 - 9 employeesIrvine, CANitech, an IT strategy consulting company, was launched in 1996. The firm focuses on IT strategy consulting and ERP consulting and SI.Read More
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114$50,000+10 - 49 employeesSan Francisco, CARead More
Exygy is a digital strategy and development company founded in 2007. Located in San Francisco, CA, Exygy’s team of about 25 employees specialize in web design, web development, and mobile app development for Android, iOS, and hybrid platforms. Other services include UI/UX design, branding, software development, and IT consulting.
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WikimediaIndustries
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115$5,000+50 - 249 employeesSan Diego, CARead More
centrexIT is an IT and IS management and consulting firm based in San Diego. The firm, founded in 2002, has more than 50 employees who provide managed IT and IS services to the health care & medical, consumer products & services, and transportation industries.
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Avista TechnologiesIndustries
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116$10,000+10 - 49 employeesSan Francisco, CAIT strategy consulting company Techlexity was founded in 2019. Located in L'viv, Ukraine and San Francisco, California, their small team provides IT strategy consulting, Custom Software Development, Web Development, Mobile App Development, and more.Read More
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117$5,000+10 - 49 employeesRoseville, CALaunched in 2012, Three Ventures Technology, Inc. Is a pay per click company. Their small team is based in Roseville, California and Frisco, Texas. Their team offers Pay Per Click, cloud consulting & SI, CRM consulting and SI, Conversion Optimization, and more.Read More
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118$1,000+50 - 249 employeesSan Francisco, CAPerimattic is a midsize San Francisco, California-based artificial intelligence company. Founded in 2022, the team focuses on Artificial Intelligence, BI & big data consulting & SI, cloud consulting & SI, Custom Software Development, and more.Read More
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119$1,000+10 - 49 employeesSalinas, CARead More
SRS Networks is an IT firm based in Salinas, Calif. Founded in 1996, their team of 30 serves clients in the transportation sectors. Services include IT strategy and staff augmentation.
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120$5,000+50 - 249 employeesIrvine, CARead More
GoSaaS is a midsize Wilmington, Delaware-based ERP consulting and SI company. Founded in 2017, the team specializes in ERP consulting and SI, cloud consulting & SI, IoT development, and business consulting.
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