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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$10,000+50 - 249 employeesL'viv, UkraineRead More
Founded in 2019, Uinno is an artificial intelligence firm. The midsize team specializes in Artificial Intelligence, Custom Software Development, Low/No Code Development, UX/UI Design, and more. The company is based in L'viv, Ukraine; Tallinn, Estonia; Kingston upon Thames, England and Zaporizhzhia, Ukraine.
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$1,000+50 - 249 employeesNaperville, ILRead More
BetterWorld 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.
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811Undisclosed50 - 249 employeesLos Angeles, CASolver is a midsize CRM consulting and SI company founded in 1996. Their services include CRM consulting and SI and ERP consulting and SI.Read More
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812Undisclosed50 - 249 employeesTorrance, CAHeadquartered in Torrance, California, Calsoft Systems is a midsize CRM consulting and SI and ERP consulting and SI company. Their services include CRM consulting and SI and ERP consulting and SI.Read More
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813$5,000+50 - 249 employeesSan Francisco, CARead More
RiskIQ is a cybersecurity company based in San Francisco with a team of just over 150 employees. Established in 2009, they provide cybersecurity, business intelligence, big data consulting, and software integration services to clients in a variety of industries.
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814$5,000+250 - 999 employeesSan Francisco, CABased in San Francisco, California and Reston, Virginia, Lookout is a Cybersecurity company. They specialize in Cybersecurity.Read More
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815$5,000+10 - 49 employeesThousand Oaks, CAZuma Technology is an IT managed services company in Thousand Oaks, California. They focus on IT managed services.Read More
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816$10,000+50 - 249 employeesSan Francisco, CABay Dynamics is a Cybersecurity company. The team provides Cybersecurity and cloud consulting & SI, and the firm is headquartered in San Francisco, California and New York, New York.Read More
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817$10,000+250 - 999 employeesIrvine, CACylance Inc. Is a Cybersecurity company. Their team is located in Irvine, California. The agency provides Cybersecurity and IT strategy consulting.Read More
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818$10,000+50 - 249 employeesSan Francisco, CAMocana Corporation is a Cybersecurity company based in San Francisco, California. The team specializes in Cybersecurity and cloud consulting & SI.Read More
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819$10,000+250 - 999 employeesPasadena, CAGuidance Software is a Cybersecurity company. Their midsize team is based in Pasadena, California and New York, New York. Their services include Cybersecurity and IT strategy consulting.Read More
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820$10,000+10 - 49 employeesLos Angeles, CAIT managed services company Streamline Networks offers IT managed services and cloud consulting & SI. They were established in 2001.Read More
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821$10,000+10 - 49 employeesLos Angeles, CANorthstar Technologies is a cloud consulting & SI company. They were launched in 1992 and specialize in cloud consulting & SI and IT managed services.Read More
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822$10,000+10 - 49 employeesLos Angeles, CAIT managed services company Reboot Networks was established in 1997. The team offers IT managed services and IT strategy consulting.Read More
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823$10,000+50 - 249 employeesAgoura Hills, CAIT strategy consulting company Key Information Systems is based in Agoura Hills, California. Their services include IT strategy consulting and BI & big data consulting & SI.Read More
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824$10,000+50 - 249 employeesCarlsbad, CAProficio, a Cybersecurity company, is located in Carlsbad, California and Singapore, Singapore. Their services include Cybersecurity and IT managed services.Read More
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825$10,000+50 - 249 employeesSan Diego, CASecurity On-Demand is a San Diego, California-based Cybersecurity company. Launched in 2001, the team specializes in Cybersecurity and IT managed services.Read More
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826$10,000+10 - 49 employeesSan Diego, CACompuOne Corporation is an IT managed services company based in San Diego, California. The team provides IT managed services and ECM consulting and SI.Read More
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827$10,000+2 - 9 employeesSan Diego, CAXonicwave is an IT managed services company. They specialize in IT managed services and cloud consulting & SI and are headquartered in San Diego, California and Anaheim, California.Read More
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828$10,000+50 - 249 employeesSanta Monica, CACounterTack, an IT managed services company, is headquartered in Waltham, Massachusetts and Santa Monica, California. Launched in 2011, the team offers IT managed services and Cybersecurity.Read More
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829$5,000+2 - 9 employeesSan Francisco, CAOneClick Solutions Group is a San Francisco, California-based IT managed services company. They specialize in IT managed services and other IT consulting and SI.Read More
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830$5,000+2 - 9 employeesFresno, CAJ - I.T. Outsource is a small IT managed services company founded in 2014. Their team provides IT managed services and IT strategy consulting.Read More
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831$5,000+50 - 249 employeesCamarillo, CAOasis Technology is an IT managed services company. The Camarillo, California-based agency was established in 1979. Their services include IT managed services and IT strategy consulting.Read More
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832$5,000+10 - 49 employeesSan Francisco, CAThink Connected, LLC is an IT managed services company. Their small team is in San Francisco, California. Their services include IT managed services and IT strategy consulting.Read More
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833$5,000+10 - 49 employeesBurlingame, CAEaton & Associates is an IT managed services company. The team specializes in IT managed services and IT strategy consulting, and the company is in Burlingame, California.Read More
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834$5,000+10 - 49 employeesTorrance, CAAurora is an IT managed services company. They provide IT managed services and IT strategy consulting and were founded in 1990.Read More
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835$5,000+10 - 49 employeesIrvine, CABCS is an IT managed services company headquartered in Irvine, California. They provide IT managed services.Read More
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836$5,000+50 - 249 employeesSouth San Francisco, CANetswitch Technology Management Inc is a midsize IT managed services company established in 2000. Their team offers IT managed services and IT strategy consulting.Read More
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837$5,000+50 - 249 employeesIrvine, CAZumasys is an IT managed services company headquartered in Irvine, California. They provide IT managed services and other IT consulting and SI.Read More
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838$5,000+10 - 49 employeesEscondido, CACirrhus9 is an IT managed services company. Founded in 2008, the team offers IT managed services and cloud consulting & SI.Read More
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839$5,000+50 - 249 employeesSan Luis Obispo, CATekTegrity Inc. Is an IT managed services company. The San Luis Obispo, California-based company focuses on IT managed services.Read More
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840$5,000+2 - 9 employeesSan Francisco, CAEstablished in 2001, Ventura Tech Inc. Is an IT managed services company. The small team specializes in IT managed services.Read More
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