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, 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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2221Undisclosed10 - 49 employeesCulver City, CAGlobalNodes is an user experience company. Their team is located in Culver City, California and provides UX/UI Design and cloud consulting & SI.Read More
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2222Undisclosed10 - 49 employeesLaguna Hills, CANeilson Marketing Services, an Email Marketing company, is headquartered in Laguna Hills, California. Their services include Email Marketing and Search Engine Optimization.Read More
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2223UndisclosedFreelancer employeesSan Francisco, CADr. Dede Tetsubayashi Consulting is a Market Research company. Their small team of employees is based in San Francisco, California. Their team offers Market Research and Corporate Training & Coaching.Read More
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2224$10,000+10 - 49 employeesSan Jose, CALocated in San Jose, California and Vancouver, Canada, A-CX is a Cybersecurity company. They focus on Cybersecurity and Custom Software Development and were launched in 2020.Read More
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2225$25,000+50 - 249 employeesSan Francisco, CARead More
SmartCat is a big data boutique consultancy firm based in Novi Sad, Serbia, with an office in San Francisco. Founded in 2015, SmartCat's team of about 85 employees provides BI/SI & big data consulting, AI, and cloud consulting services primarily for mid-market businesses.
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2226$1,000+10 - 49 employeesLaguna Beach, CABlack Core SP.Zo.o.S.k is a small Gdynia, Poland-based big data analytics company. Their services include BI & big data consulting & SI and Digital Strategy.Read More
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2227$10,000+50 - 249 employeesWestlake Village, CABusiness intelligence company Agilisium is located in Westlake Village, California and Chennai, India. The team provides BI & big data consulting & SI and cloud consulting & SI.Read More
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2228$10,000+250 - 999 employeesWest Hollywood, CALaunched in 2003, Herjavec Group is an IT managed services company. The team provides IT managed services and Cybersecurity.Read More
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2229$5,000+10,000+ employeesIrvine, CARead More
Randstad Technologies is an IT staff augmentation firm based in Irvine, Calif. Founded in 1960, their team of over 10,000 serves clients in the IT, finance, and healthcare sectors. Services include IT strategy consulting and IT managed services.
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2230$25,000+50 - 249 employeesLos Angeles, CABookmark Content and Communications, a Content Marketing company, is based in Holborn, England and Toronto, Canada. They offer Content Marketing and CRM consulting and SI and were launched in 1986.Read More
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2231Undisclosed250 - 999 employeesSanta Clara, CACRM consulting and SI and Customer Service Outsourcing company AST LLC was launched in 1995. The firm specializes in CRM consulting and SI and Customer Service Outsourcing, and is midsize.Read More
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2232$5,000+250 - 999 employeesClearwater, FLRead More
Integris, an IT managed services company, is headquartered in Cranbury, New Jersey; Owings Mills, Maryland; New York, New York and Philadelphia, Pennsylvania. The midsize team provides IT managed services, IT strategy consulting, Cybersecurity, and cloud consulting & SI and was established in 2021.
Clients
Fitness & WellnessIndustries
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2233$1,000+50 - 249 employeesIrvine, CAHiphen Consulting, a Business Consulting company, is headquartered in Dubai, United Arab Emirates and Bengaluru, India. They offer Business Consulting and Accounting and were established in 2021.Read More
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2234$25,000+1,000 - 9,999 employeesCorte Madera, CAEstablished in 2003, Svitla Systems is an IT managed services company. They are located in Corte Madera, California; Guadalajara, Mexico; Kraków, Poland and San Jose, Costa Rica and have a large team. Their services include IT managed services, Web Development, cloud consulting & SI, Artificial Intelligence, and more.Read More
Clients
Logitech Helper Systems Wisetack Trauma BraceIndustries
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2235$50,000+250 - 999 employeesPalo Alto, CARead More
Waverley Software is a software engineering company headquartered in Palo Alto, Calif. It also has offices in Boston, Kharkiv, Ukraine, Lviv, Ukraine, and Ho Chi Minh, Vietnam. Founded in 1992, Waverley's team of over 80 employees mainly provides midmarket brands around the world with custom software development, mobile app development, and IoT development services.
Clients
Mozilla Seagate Yale AbbotIndustries
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2236UndisclosedFreelancer employeesBurbank, CAApplication Testing company CyberTest is located in Burbank, California. They provide Application Testing and Cybersecurity.Read More
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2237UndisclosedFreelancer employeesWest Hollywood, CAWe Are Momentus Inc. Is an AI Agents company established in 2025. The small team offers AI Agents and IT strategy consulting.Read More
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2238UndisclosedFreelancer employeesLong Beach, CAEstablished in 2016, STRATEGOK is a small AI Agents company located in Long Beach, California. Their team offers AI Agents and BI & big data consulting & SI.Read More
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2239UndisclosedFreelancer employeesTorrance, CAAIGEN Consulting is an AI Agents company. The firm is headquartered in Torrance, California. Their services include AI Agents and CRM consulting and SI.Read More
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2240Undisclosed250 - 999 employeesSan Mateo, CAMidsize Cybersecurity company Keyfactor , is headquartered in Independence, Ohio and Solna, Sweden. The team offers Cybersecurity and IoT development.Read More
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2241$25,000+50 - 249 employeesMountain House, CANDOT is an artificial intelligence company founded in 2008. The agency offers Artificial Intelligence and BI & big data consulting & SI.Read More
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2242Undisclosed50 - 249 employeesSan Francisco, CASofomo is a business intelligence company. They are in Wrocław, Poland and San Francisco, California. Their team provides BI & big data consulting & SI and cloud consulting & SI.Read More
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2243$50,000+1,000 - 9,999 employeesSan Jose, CAIoT development company eInfochips - an Arrow company was launched in 1994. The company focuses on IoT development and cloud consulting & SI.Read More
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2244$5,000+2 - 9 employeesLos Angeles, CABiago Media is an e-commerce development firm based in Los Angeles, California. Launched in 2005, the team specializes in E-Commerce Development and IT managed services.Read More
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2245Undisclosed2 - 9 employeesLos Angeles, CASJC Business Management Inc., a small Business Consulting company, is headquartered in Los Angeles, California. The team offers Business Consulting and Accounting.Read More
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2246Undisclosed2 - 9 employeesSan Jose, CAIn San Jose, California, Crawford Pimentel Corporation is a small Accounting company. Their services include Accounting and IT managed services.Read More
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2247Undisclosed2 - 9 employeesCarlsbad, CALaunched in 2011, Portavoce Public Relations is a PR company. Their services include Public Relations and Social Media Marketing.Read More
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2248Undisclosed2 - 9 employeesMillbrae, CAMadison Alexander PR is a public relations agency established in 2004. The small team offers Public Relations and IT managed services.Read More
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2249Undisclosed2 - 9 employeesLakewood, CABranding agency Senarysoft was established in 2012. The company specializes in Branding and Web Design.Read More
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2250Undisclosed2 - 9 employeesWest Covina, CAAtlas Software Group is a custom software development company launched in 2005. The agency offers Custom Software Development and cloud consulting & SI.Read More
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