Top IT Services Companies in California

Are you looking to seek consultation from the best IT services companies in California? Professional IT services lend you a fresh perspective and help you analyze your existing setup. Innovative solutions from IT service providers will act as a catalyst to bring about positive changes in your current setup and help you strengthen the security of your data. With cost-effective, customized solutions, you can realize more productivity in your structure. Here is a list of the top IT firms in California rated on quality, reliability, and ability.

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726 CompaniesRankings updated: May 25, 2026
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List of IT Services Companies in California | Top IT Firms in California

  • Abtech was founded in 1989 in San Diego, California, specializing in the supply of parts for H9000 servers and workstations. Over the years, the company has grown and diversified and is now a nationwide IT services and solutions company offering a wide range of IT products and services.

    $50 - $99/hr
    50 - 249
    1989
    Carlsbad, California
  • TVG Consulting provides a one-stop IT Consulting solution for companies with 10-150 employees demanding their network and systems to be "always on and available"​ . TVG includes a US/Southern California staffed HelpDesk with experienced and certified engineers and support personnel ready to support all types of businesses. 

    $25 - $49/hr
    2 - 9
    2005
    Burbank, California
  • Fortinet secures the largest enterprise, service provider, and government organizations around the world. Fortinet empowers its customers with intelligent, seamless protection across the expanding attack surface and the power to take on ever-increasing performance requirements of the borderless network - today and into the future.

    $50 - $99/hr
    1,000 - 9,999
    2000
    Sunnyvale, California
  • Fortis is a Sacramento Area provider of managed IT services, hosted VoIP, and high speed, redundant internet. We're dedicated to taking the hassle out of managing business technology.

    < $25/hr
    10 - 49
    2005
    El dorado Hills, California
  • As a leading provider of managed IT services, offering dedicated IT support to businesses in the Sacramento region, Raptor IT Consultants has obtained numerous awards for the quality of our IT services and dedicatation to customer service in the community. We're dedicated to offering affordable managed IT services and IT consulting with a dedicated IT ... read Raptor IT Consultants reviews & insights

    < $25/hr
    2 - 9
    2017
    Sacramento, California
  • Advanced IT, one of the leading IT Outsourcing Company established in 2003 in Santa Clara CA provides Information Technology Services that cost-effectively meet your business demands today. We rapidly implement enterprise solutions to turn your business vision into practical reality. Considered as one of the Best IT Solutions Provider Companies in Sacramento, California, our mission ... read Advanced IT reviews & insights

    < $25/hr
    2 - 9
    2003
    Rocklin, California
  • Voiso is a SaaS call center solution with its own telecom infrastructure supported by 12 PoPs worldwide. With advanced historical reporting and real-time monitoring features, Voiso can streamline operations for outbound, inbound, and blended call centers. Intuitive interface and flexible functionality make Voiso suitable for practically any use case.For outbound sales, Voiso enforces abandonment ratios, ... read Voiso reviews & insights

    NA
    50 - 249
    2016
    Los Angeles, California
  • EPIQ Infotech is a trusted NetSuite Solution Provider in the UAE, delivering end-to-end NetSuite services for growing and enterprise-level businesses. As an experienced NetSuite implementation partner, EPIQ helps organizations plan, deploy, and optimize NetSuite ERP to strengthen financial control, improve operational visibility, and support scalable growth across the region. EPIQ specializes in NetSuite implementation, integration, ... read EPIQ Infotech reviews & insights

    NA
    50 - 249
    2013
    Richmond, California
  • Los Angeles IT provides a comprehensive range of services to meet the diverse needs of modern businesses. Our managed IT services offer ongoing management of IT infrastructure, including monitoring, maintenance, and support for networks, servers, and end-user devices, ensuring that systems operate smoothly and efficiently. We specialize in network management, covering the design, setup, and ... read Los Angeles IT - Managed IT Services reviews & insights

    $50 - $99/hr
    2 - 9
    2000
    Los Angeles, California
  • Code Driven Labs, our journey is rooted in a simple yet powerful objective: to make technology accessible and effortless for everyone. Founded with a passion for innovation and a commitment to simplifying the intricate world of tech, we have become a trusted name in the IT industry. Our unwavering dedication to this mission has led ... read Code Driven Labs reviews & insights

    $25 - $49/hr
    10 - 49
    2021
    San Francisco, California
  • Webmob Technologies is a global leader in custom web and app development, offering consulting and development services to businesses of all sizes - from startups to mid-sized organizations to enterprises. Our custom web and app development expertise has earned us top reviews & a prominent position in the industry. With over 12+ years of experience, ... read WebMob Technologies reviews & insights

    < $25/hr
    50 - 249
    2010
    San Jose, California
    Not good - Managing Director
  • Using AI Tools

    • GitHub CopilotGitHub Copilot

    Since 1981, PC Professional has helped Bay Area businesses and nonprofits use technology with confidence. With 45+ years of experience, 300+ clients, and 1,000+ completed projects, we deliver Managed IT, Cybersecurity, AI Solutions, Cloud Services, Disaster Recovery, and IT Consulting. Our Oakland-based team of 20+ engineers, supported by 6 live IT support helpdesk specialists and ... read PC Professional reviews & insights

    NA
    10 - 49
    1981
    Oakland, California

    Why PC Professional?

    • No Long-Term Contracts
    • Scalable, Cost-Effective Solutions
    • 15 Minute Response Time
  • We are an IT outsourcing and software development company with more than 10 years of experience in connecting you with a pool of prevetted global talent. Our network is made up of experts in recruiting and workforce solutions across technologies and engineering. Advancio’s industry expertise and full-service capabilities in dedicated teams and project-based solutions in different industries ... read Advancio reviews & insights

    $50 - $99/hr
    50 - 249
    2010
    Valencia, California
  • CA Veracode’s automated security tools deliver fast, repeatable and actionable results, without the noise of false positives. Our tools integrate into existing development toolchains, enabling you to quickly identify and remediate security flaws early in your process—without adding needless steps to the software lifecycle, so you can continue creating high-quality and secure software.

    < $25/hr
    10000+
    1976
    Santa Clara, California
  •  Founded in 1999 as one of the first SaaS security companies, Qualys has established strategic partnerships with leading managed service providers and consulting organizations including Accenture, BT, Cognizant Technology Solutions, Deutsche Telekom, Fujitsu, HCL Technologies, HP Enterprise, IBM, Infosys, NTT, Optiv, SecureWorks, Tata Communications, Verizon and Wipro. The company is also a founding member of ... read Qualys reviews & insights

    < $25/hr
    250 - 999
    1999
    Foster City, California
  • Proficio is a world-class Managed Security Service Provider (MSSP) providing managed detection and response solutions, 24×7 security monitoring and advanced data breach prevention services to organizations globally. 

    $25 - $49/hr
    50 - 249
    2010
    Carlsbad, California
  • Xantrion was founded in 2000 to provide enterprise-grade IT services to midsized businesses in the San Francisco Bay Area. Our focus has never wavered

    < $25/hr
    50 - 249
    2000
    Oakland, California
  • HIPAA Vault  is a leading provider of HIPAA compliant cloud solutions, enabling healthcare providers, business organizations, and government agencies to secure their protected health information from data breaches, threats, and security vulnerabilities. At the core of HIPAA Vault’s business is the managed solutions architecture that is included with every product and service. Advanced security measures ... read HIPAA Vault reviews & insights

    NA
    10 - 49
    1997
    San Diego, California
  • For 30 years now, AOCUSA has been on the frontline of developing software and providing technical support for everyday small and large business alike. Starting off as a two man partnership, our team has grown over the years to provide reliable service to all our clients. No client is less important than another whether it ... read Alpha & Omega Computer Inc. reviews & insights

    NA
    2 - 9
    1987
    Hacienda Heights, California
  • We at CyberTrust IT Solutions is delivering one of the best managed IT services in Orange County, which helps you in improving and simplifying your IT needs. We aim to serve fully managed IT services to small and mid-sized businesses by our best IT services, including IT, support, IT consulting, cybersecurity, cloud computing, data backup ... read CyberTrust IT Solutions reviews & insights

    NA
    10 - 49
    1996
    Lake Forest, California
  • Using AI Tools

    • GeminiGemini

    Fusion Factor Corporation is an award-winning IT Services provider based in San Diego County. The organization specializes in managed IT services, cybersecurity, cloud solutions, and disaster recovery; we deliver 24/7 in-house support. Our expertise is 24/7 support and quick response within 1 hour, making us one of the best.  The organization is recognized by CRN ... read Fusion Factor reviews & insights

    NA
    10 - 49
    2005
    San Diego, California

    Why Fusion Factor?

    • Proactive system monitoring & maintenance
    • Network security & compliance
    • Strategic IT consulting
  • CompuOne is a woman / veteran-owned, IT services provider in San Diego, CA. We opened our doors in 1997 with the goal of becoming a technology solution provider centered around our core values: Customer Service, Quality, Integrity, Honesty, and Respect. Our vision is to develop reliable IT solutions essential to our clients’ needs, and apply ... read CompuOne reviews & insights

    < $25/hr
    10 - 49
    1997
    San Diego, California
  • Global IT Services primarily provides staff augmentation solutions across the most critical IT services and skills that are required. We are also an information technology service company providing system design, development and deployment of applications across multiple industry sectors, ranging from government entities to healthcare providers to private businesses. We leverage a diverse scope of ... read Global IT Services reviews & insights

    < $25/hr
    10 - 49
    2011
    Sacramento, California
  • For over 15 years, Adept Solutions has been helping local companies leverage technology to reach their business goals faster, smarter and within budget. Our focus is on growth, with the right technology solutions at the right time.

    < $25/hr
    2 - 9
    2004
    Yuba City, California
  • Started in 2003, Pacific Computer Consultants is a complete technology solution provider.  We are 100% committed to making sure business owners have the most reliable and professional IT service in the San Francisco East Bay Area. Our team of talented IT professionals can solve your IT nightmares once and for all.

    < $25/hr
    2 - 9
    2003
    Concord, California
  • Hassle-Free Computer Network and Repair Services for Small and Mid-Size Businesses in the greater San Francisco Bay Area as well as Santa Cruz and Monterey Counties.

    < $25/hr
    2 - 9
    2002
    San Jose, California
  • Unity Networking understands the hurdles that small and medium-sized business owners face on a day to day basis. Our goal is to help you overcome some of those hurdles by providing IT solutions that meet your business objectives. We understand that in order for us to be successful, you need to be successful. The only ... read Unity Networking reviews & insights

    < $25/hr
    2 - 9
    Orangevale, California
  • TechMD is an award-winning IT solutions firm that specializes in cloud solutions, managed cybersecurity services, strategic IT consulting, and managed IT services. We are passionate about bringing enterprise-level productivity, scalability, and security to small and medium businesses.  

    $25 - $49/hr
    50 - 249
    2003
    Santa Ana, California
  • Ficstar’s story began in 2005 when a team of passionate believers decided that the latest internet technologies could be used to automate the process of archiving all dynamic content from the internet. We knew we were on to something – the ability to provide a complete data solution that would relieve businesses of the overwhelming ... read Ficstar reviews & insights

    < $25/hr
    2 - 9
    San Francisco, California
  •   Kofax’s Intelligent Automation software platform helps organizations transform information-intensive business processes, reduce manual work and errors, minimize costs, and improve customer engagement. We combine RPA, cognitive capture, process orchestration, mobility and engagement, and analytics to ease implementations and deliver dramatic results that mitigate compliance risk and increase competitiveness, growth and profitability. For more information, ... read Kofax reviews & insights

    < $25/hr
    2 - 9
    1985
    Irvine, California
  • Hitech is one of the top BPO companies in India, founded in 1992, that provides valuable business process outsourcing solutions to small and medium businesses across the globe. Our vision is to help our clients to improve efficiency and profitability by letting them the full benefits of partnering with an offshore outsourcing company.

    < $25/hr
    2 - 9
    1992
    Santa Clara, California
  • AltezzaSys is a AWS , Microsoft & SAP Partner & CMM Level 3 Global Consulting & HR Solutions services provider with a team of 260+ resources with offices in some major cities of the world  ,that delivers value and competitive advantage to its customers by improving their access to critical information, automating their business processes, ... read Altezzasys Systems Pvt Ltd reviews & insights

    NA
    250 - 999
    2014
    Sunnyvale, California
  • Fridell Technical Solutions is a Managed IT Services provider based in San Diego, California. We empower businesses to get more return from their investment in technology. We deliver IT-related business solutions to different organizations that are investing or planning to invest in Information Technologies, Managed Services to grow their business online. We will first learn ... read Fridell Technical Solutions reviews & insights

    NA
    2 - 9
    2011
    Escondido, California
  • All of our calls are answered live. The average amount of time it takes for one of our clients to get on the phone with a technician who can start working on resolving their problem is 30 minutes. We know you’re busy and have made a sincere commitment to making sure your computer problems get ... read Biztek Solutions reviews & insights

    NA
    10 - 49
    Riverside, California
  • "We are certain in putting attention on long term commitment to our valuable customers. We possess key solutions to run and guide your business growth in every level."

    NA
    10 - 49
    Los Angeles, California
  • Captain IT is a local IT firm that specializes in providing "Instant Peace of Mind I.T. Services"​ to business owners in the Riverside and San Bernardino counties. Our core services include flat-fee Managed IT Services, Data Backup & Recovery, Cloud Computing and VoIP Phone Systems. Captain IT is a company that was born from the ... read Captain IT reviews & insights

    < $25/hr
    2 - 9
    Riverside, California
  • In these unprecedented times, we feel that one of the best things we can do to make a difference for local businesses is to offer a little guidance.  Business leaders need fast, concrete, prescriptive suggestions and solutions so that their companies can continue to be successful and survive this current situation. As such, we have ... read Sagacent Technologies reviews & insights

    < $25/hr
    2 - 9
    2000
    San Jose, California
  • Digital Mountain, Inc. is a leading global provider of electronic discovery, computer forensics, cybersecurity and data analytics services.

    NA
    50 - 249
    2003
    Santa Clara, California
  • Saitech Inc is an innovative value-added supplier for information technology hardware, software, supply chain services to support cloud computing, data center management, data storage, rugged mobility devices, marine electronics, and office equipment. Saitech Inc provides a total solution to IT acquisitions by providing multi-vendor hardware and software along with significant pre-sale and post-sale services. We ... read Saitech, Inc reviews & insights

    $25 - $49/hr
    10 - 49
    2005
    Fremont, California
  • Zybex® Medical Billing Services can help improve the efficiency of your business office. We understand the nuances of working with payers to collect on accounts, and use our accounting software to reduce the time you spend managing finances.Zybex® provides IT consulting, network solutions, and computer repair and maintenance. In addition to custom website and software development, we ... read Zybex reviews & insights

    NA
    10 - 49
    1979
    San Diego, California
  • Zeta Sky's mission, since it was founded, is to deliver secure, simple, and scalable IT solutions for businesses. Our specialty at Zeta Sky is cybersecurity. We’ve hosted many events since we began with a mixture of business owners and IT professionals – including experts from the FBI. With a niche focus on serving law firms, ... read Zeta Sky LLC reviews & insights

    NA
    2 - 9
    2014
    Rancho Cucamonga, California
  • Our solutions are designed to consider your current and future growth and most of all to be affordable and reliable.  Our processes are honed to deliver what is promised and exceed your expectations and make sure all T’s are crossed and the I’s are doted. In today’s fast pace business environment responsiveness is the most ... read IT21ST, LLC reviews & insights

    NA
    2 - 9
    2015
    Los Angeles, California
  • CyberDuo offers a comprehensive suite of IT services for small to medium sized business. We employ a team of highly trained and certified IT and cybersecurity engineers with deep knowledge of the most advanced, secure, and reliable technologies. With response times and client satisfaction well-above industry averages, our fully-managed IT services provide clients with the ... read CyberDuo reviews & insights

    NA
    10 - 49
    2010
    Los Angeles, California
  • Cure8 is the go-to IT partner for cannabis companies involved in Retail, Medical Dispensaries, Cultivation, Manufacturing, and Distribution throughout the US and Canada. We're the company you call whenever you need help with anything tech - including POS systems, surveillance systems, networks, and back-office computers. We help cannabis businesses plan, procure, install, secure, manage, and ... read Cure8 reviews & insights

    NA
    10 - 49
    2019
    Studio City, California
  • iOPEX is a new-generation Experience Engineering led digital services provider offering Digital Engineering, Transformation, and Operational services. We are process and technology innovators focused on extracting the best out of the investments you have already made. At iOPEX, we help you realize that golden ratio where your technology and business are in complete synergy, making your company greater than the sum ... read iOPEX Technologies reviews & insights

    NA
    1,000 - 9,999
    2009
    San Jose, California
  • Marvis Technology is an innovative and technology driven company that provides IT consulting and Managed Services for SMB and Enterprise.

    < $25/hr
    2 - 9
    Los Angeles, California
  • As you grow and add locations for your business, it takes time and money to manage your company’s voice and data infrastructure. At Meridian Network Services, our customers take center stage. We make it our business to understand your business. We start by truly understanding your needs so we are  equipped to find tailor-made solutions ... read Meridian Network Services reviews & insights

    NA
    2 - 9
    San Juan Capistrano, California
  • Advanced Networks is a growing and innovative IT Services ­firm in Los Angeles that focuses on helping clients leverage technology in their organizations. We work with our clients to design and implement IT support in LA, cloud based solutions, network & systems infrastructure and focus on improving overall operations.

    < $25/hr
    10 - 49
    2004
    Los Angeles, California

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