Top 100 Systems Integrator Companies in Connecticut
The Best of December 2025List of the Best Connecticut System Integrators
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1$1,000+10 - 49 employeesNaugatuck, CTRead More
NSI is a small IT managed services company established in 1985. Their services include IT managed services, IT strategy consulting, cloud consulting & SI, other IT consulting and SI, and more. The agency is headquartered in Naugatuck, Connecticut.
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2$10,000+50 - 249 employeesFairfield, CTMidsize software development company ObjectStyle, is located in Fairfield, Connecticut; Fairfield, Connecticut and Warszawa, Poland. They specialize in Custom Software Development, Enterprise App Modernization, Microservices Architecture Services, Sports Marketing, and more and were founded in 2002.Read More
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NHLIndustries
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3Undisclosed10 - 49 employeesHarwinton, CTRead More
CAL Business Solutions is a consultancy based in Harwinton, Conn. with a second office in New York City. Founded in 1982, the team of 32 specializes in ERP consulting and system integration services for mid-sized companies in the consumer industry.
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Frederick BlockIndustries
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4$25,000+10 - 49 employeesNew Haven, CTHarris Digital, an e-commerce development company, is based in New Haven, Connecticut and Fort Atkinson, Wisconsin. The small team focuses on E-Commerce Development, Digital Strategy, UX/UI Design, ERP consulting and SI, and more. The company was established in 2006.Read More
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5Undisclosed50 - 249 employeesShelton, CTRead More
Launched in 2000, Flagship Networks, Inc. Is an IT managed services company. They are based in Shelton, Connecticut and have a midsize team. The firm specializes in IT managed services, cybersecurity, IT strategy consulting, cloud consulting & SI, and more.
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6Undisclosed10 - 49 employeesFarmington, CTCRM consulting and SI company ITWorx is in Cairo, Egypt and Farmington, Connecticut. The team provides CRM consulting and SI and ERP consulting and SI.Read More
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7$1,000+2 - 9 employeesWest Hartford, CTFounded in 1995, Universal Connectivity is a cloud consulting & SI company. The team offers cloud consulting & SI and unified communications consulting & SI.Read More
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8Undisclosed1,000 - 9,999 employeesStamford, CTRizing is a cloud consulting & SI company. Located in Stamford, Connecticut, the company provides cloud consulting & SI and HR Consulting.Read More
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9Undisclosed50 - 249 employeesRocky Hill, CTFounded in 1985, Tallan, a midsize IT strategy consulting company, is based in Rocky Hill, Connecticut. Their services include IT strategy consulting and ERP consulting and SI.Read More
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10$25,000+10 - 49 employeesStamford, CTNexVue is an ERP consulting and SI company. The team focuses on ERP consulting and SI and BI & big data consulting & SI and is located in Stamford, Connecticut.Read More
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11Undisclosed2 - 9 employeesWest Hartford, CTMrkt insight, a small SEO services firm, is headquartered in West Hartford, Connecticut and Avon, Connecticut. They provide search engine optimization, web design, marketing strategy, digital strategy, and more and were launched in 2024.Read More
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12$10,000+50 - 249 employeesNew Haven, CTSphereGen is a software development company. The team is in New Haven, Connecticut and Pune, India, and their services include Custom Software Development and AR/VR development.Read More
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13$1,000+10 - 49 employeesCheshire, CTSpectrum Virtual, a cloud consulting & SI company, was established in 2013. The team specializes in cloud consulting & SI and unified communications consulting & SI.Read More
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14Undisclosed2 - 9 employeesWallingford, CTMega Information Technology is a Wallingford, Connecticut-based IT strategy consulting company. The small company was established in 2023. Their services include IT strategy consulting, BI & big data consulting & SI, cloud consulting & SI, CRM consulting and SI, and more.Read More
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15Undisclosed50 - 249 employeesWest Hartford, CTVIAcode, a cloud consulting & SI and IT managed services company, was established in 2001. The agency provides cloud consulting & SI and IT managed services, and is midsize.Read More
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16Undisclosed2 - 9 employeesShelton, CTTangible Analytics Consulting is a small CRM consulting and SI company established in 2016. Their team focuses on CRM consulting and SI and BI & big data consulting & SI.Read More
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17$5,000+2 - 9 employeesSouthington, CTP2 Automation, LLC, a CRM consulting and SI company, is headquartered in Southington, Connecticut. Established in 2011, the team specializes in CRM consulting and SI and Custom Software Development.Read More
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18Undisclosed10 - 49 employeesMeriden, CTUNAPEN, Inc., an IT managed services company, was launched in 1991. The agency provides IT managed services and Custom Software Development, and is small.Read More
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19$1,000+10 - 49 employeesGreenwich, CTLighthouse Technology Partners is an IT managed services company founded in 1948. The team specializes in IT managed services and cloud consulting & SI.Read More
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20Undisclosed50 - 249 employeesTrumbull, CTCorserva is an IT strategy consulting company founded in 1985. The midsize team provides IT strategy consulting and cloud consulting & SI.Read More
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21Undisclosed2 - 9 employeesVernon, CTRAD Computing is an IT strategy consulting company. The Vernon, Connecticut-based company offers IT strategy consulting and cloud consulting & SI.Read More
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22$5,000+2 - 9 employeesStamford, CTCognivo, a big data analytics company and software development firm, was founded in 2017. The agency provides BI & big data consulting & SI and Custom Software Development.Read More
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23$100,000+50 - 249 employeesWestport, CTEstablished in 2010, Zaelab is an e-commerce development company. The midsize team specializes in E-Commerce Development and cloud consulting & SI.Read More
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24Undisclosed10 - 49 employeesEast Hartford, CTTriple Helix Corporation is an ERP consulting and SI company founded in 2004. Located in East Hartford, Connecticut, the team provides ERP consulting and SI and Custom Software Development.Read More
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25Undisclosed2 - 9 employeesBristol, CTCRM consulting and SI company Quad4Cloud was launched in 2022. The firm offers CRM consulting and SI and Custom Software Development, and is small.Read More
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26Undisclosed10 - 49 employeesRidgefield, CTMaxQ Technologies is a small Ridgefield, Connecticut-based CRM consulting and SI company. The team focuses on CRM consulting and SI and other IT consulting and SI.Read More
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27$1,000+250 - 999 employeesStamford, CTAspire IT Services Partner is a midsize IT managed services company founded in 2002. Their team provides IT managed services and IT staff augmentation.Read More
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28$1,000+10 - 49 employeesWest Hartford, CTCRM consulting and SI company RevSolutions was established in 2023. The team specializes in CRM consulting and SI and IT managed services.Read More
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29$1,000+10 - 49 employeesMeriden, CTNeeFox® is a social media marketing firm. They are in Meriden, Connecticut and Lahore, Pakistan. Their team focuses on Social Media Marketing and CRM consulting and SI.Read More
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30Undisclosed10 - 49 employeesWallingford, CTIT managed services company ASG Information Technologies is located in Wallingford, Connecticut. They offer IT managed services and Cybersecurity.Read More
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