Top 100 Systems Integrator Companies in California

Founded in 2001, Trianz is a strategic agency headquartered in Santa Clara, Calif. with offices all over the United States, including Boston, Chicago, and Seattle.Their team has over 1,000 employees that specialize in big data consulting, cloud consulting, and IT strategy consulting. 

SADA Systems, with a team of 350+ employees, is a software consulting agency that was founded in 2000. SADA Systems is headquartered in Los Angeles, with an office in Washington. The agency helps a variety of clients with their cloud consulting and system integration, IT strategy consulting, and software development needs.

MondayCall is a cloud and CRM consulting firm based in San Francisco. Their team of about 150 serves clients of all sizes across a range of industries. Additional services include SI and IT managed services. They were founded in 2009.

ExpertsFromIndia is a development company based in San Jose, Calif. They were founded in 2003 and have a team of around 800 employees. They primarily provide custom software development and SEO. 

Akins IT is a small cybersecurity company based in Newport Beach, California. The team specializes in cybersecurity, IT strategy consulting, and cloud consulting & SI.

Galliot is a San Francisco-based software development firm founded in 2018. With an additional office in Montevideo, Uruguay, their 10-man-team develops products for midmarket and enterprise-level clients. While custom software and DevOps are their specialties, they also offer web development and cloud consulting.

Launched in 2011, Dynamics Square is a big data analytics company. The company specializes in BI & big data consulting & SI, cloud consulting & SI, CRM consulting and SI, ECM consulting and SI, and more and has a midsize team.

Cymetrix Software is a CRM consulting and SI company headquartered in San Francisco, California and Mumbai, India. They specialize in CRM consulting and SI, custom software development, and BI & big data consulting & SI and were launched in 2016.

Vertical Computers is an IT services company based in Chino, Calif. The company, founded in 2014, has a team of around 15 that provides IT managed services, cloud consulting & SI, and voice services to various companies.

Turing is a small IT staff augmentation company. Established in 2018, the agency is in Palo Alto, California. Their services include IT staff augmentation.

Based in Campbell, California, Barracuda is a large cloud consulting & SI company. The team specializes in cloud consulting & SI, cybersecurity, other IT consulting and SI, and application management & support.

Technology Management Concepts is an IT consulting firm based in Marina Del Rey, Calif. it was founded in 1984, and has 38 employees. Technology Management Concepts specializes in ERP consulting & SI, application management & support and CRM consulting and SI. 

Metal Toad is an AWS consulting partner based in Beverly Hills, Calif., with offices in Portland, Ore. and Pasadena, Calif. The company, founded in 2003, has more than 25 employees who provide, among others, cloud consulting & SI, IT managed services, and custom software development services to the media & entertainment, manufacturing, and automotive industries.

Facet Interactive is a digital strategy agency based in El Segundo, Calif. Since 2014, their small team of 3 employees has been specializing in digital strategy, SEO, PPC, and more. They primarily serve small businesses in the advertising and education industries. 

Abtech Technologies is an IT managed services company. They are in Carlsbad, California and have a midsize team. The firm provides IT managed services, cloud consulting & SI, IT staff augmentation, IT strategy consulting, and more.

Fastly is an edge cloud platform for developers founded in 2011in San Francisco. With over 900 employees scattered in various international locations, they provide cloud consulting, systems integration, IT consulting, and more.

Cloudsquare is a Salesforce Consulting Partner that is based in Los Angeles, CA, with a direct focus on strategic advisory, technical implementation, and business transformation. Founded in 2017, they have about 30+ employees, that primarily support mid-market companies with a focus on the financial services and healthcare sectors. Services include Salesforce consulting, implementation, integrations, and managed services.

Insightful Networks is a business intelligence company. The midsize West Hollywood, California-based agency was founded in 1998. Their team provides BI & big data consulting & SI, IT staff augmentation, IT managed services, other IT consulting and SI, and 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.

Founded in 2010, Mission is an AWS managed services partner based in El Segundo, Calif. Their team of 83 employees specializes in IT managed services, cloud consulting and SI, and enterprise app modernization.

3Q Digital is a digital marketing and strategic consulting agency headquartered in San Mateo, Calif. with additional offices in San Diego, San Francisco, Chicago, New York, Burlington, Vt., Austin, Texas, and Raleigh, N.C. Their staff consists of over 250 experts in SEO, social media marketing, and analytics.

Be Structured Technology Group is a managed services provider (MSP) headquartered in Los Angeles. Established in 2007, they work with business services and nonprofit companies, providing IT managed services, strategy and cloud consulting, cybersecurity, and system integration. They're a team of 11-employees.

Data Monsters is a big data analytics company headquartered in San Francisco, California and , Russia. Established in 2015, the midsize team focuses on BI & big data consulting & SI, custom software development, and Artificial Intelligence.

Sidebench is a strategy, design, and development consultancy with a team of 70+ experts headquartered in Los Angeles. Founded in 2012, Sidebench caters to enterprise companies and new ventures seeking the management consultants & experienced founders, the technical chops of systems architects, and a UX-first approach. Sidebench provides app and web development, UX/UI design, web design, and app testing via a fully integrated product delivery team.

Infracore is a IT managed services company founded in 2003. Their midsize team is located in San Diego, California and focuses on IT managed services, cybersecurity, cloud consulting & SI, IT staff augmentation, and more.

Tailored Technology Services Inc. Is a small Irvine, California-based IT managed services company. Founded in 2013, the team offers IT managed services.

Cyber Duo is a cybersecurity consulting firm that was founded in 2008 and is located in Los Angeles. They have four employees who offers a suite of managed IT services, cybersecurity solutions and cloud computing. They work predominantly for small businesses and midmarket companies.

Wendego I.T. Solutions is an IT firm based in San Diego and founded in 2006. With no more than 10 employees, they provide IT managed services, IT strategy consulting, and cybersecurity services for clients in the industries of health care and financial services.

TruAdvantage is a San Jose, Calif.-based security-focused managed IT provider. It was founded in 2010 and now has a team of 19 that provides IT managed services, cybersecurity, cloud consulting & SI, and IT strategy consulting.

Headquartered in Redondo Beach, California, IT Accuracy is a cloud consulting & SI company. The small company was launched in 2007. Their team specializes in cloud consulting & SI, IT managed services, cybersecurity, IT strategy consulting, and more.