Top 100 IT Services Companies in Illinois
The Best of August 2026Looking for a top IT services company in Illinois?
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 Illinois. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
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List of the Best Illinois IT Companies
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361Undisclosed10 - 49 employeesLake Forest, ILPassage Technology is a CRM consulting and SI company. The team specializes in CRM consulting and SI and is in Lake Forest, Illinois.Read More
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362Undisclosed250 - 999 employeesChicago, ILSilvr Lining Group - A Spaulding Ridge Company, a cloud consulting & SI company, was founded in 2017. The midsize team specializes in cloud consulting & SI and CRM consulting and SI.Read More
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363Undisclosed50 - 249 employeesChicago, ILSoliant Consulting is a software development firm headquartered in Chicago, Illinois and Devon, Pennsylvania. Their services include Custom Software Development and cloud consulting & SI.Read More
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364Undisclosed2 - 9 employeesSchaumburg, ILFort Knox Data Migration Services is a CRM consulting and SI company. They offer CRM consulting and SI and are located in Schaumburg, Illinois.Read More
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365Undisclosed250 - 999 employeesSchaumburg, ILEstablished in 2004, Blue.cloud is an Application Testing company. The team focuses on Application Testing and cloud consulting & SI and is headquartered in Tampa, Florida and Schaumburg, Illinois.Read More
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366Undisclosed2 - 9 employeesMahomet, ILCybersecurity and IT managed services company Bambenek Consulting, LTD was launched in 2011. The firm provides Cybersecurity and IT managed services, and is small.Read More
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367Undisclosed10 - 49 employeesCollinsville, ILHeadquartered in Collinsville, Illinois and St. Louis, Missouri, Computerease Group, Inc is a Cybersecurity company. Their services include Cybersecurity and IT managed services.Read More
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368Undisclosed50 - 249 employeesOak Brook, ILStrategic Solutions, Inc., a midsize Cybersecurity and IT managed services company, is in Oak Brook, Illinois. Their services include Cybersecurity and IT managed services.Read More
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369Undisclosed10 - 49 employeesSouth Barrington, ILIT strategy consulting company BSSI2 LLC specializes in IT strategy consulting and cloud consulting & SI. They were launched in 2005.Read More
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370Undisclosed10 - 49 employeesChicago, ILTeamWerks is a Cybersecurity company. Launched in 1999, their team provides Cybersecurity.Read More
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371Undisclosed2 - 9 employeesChicago, ILTalkRisk, a Cybersecurity company, focuses on Cybersecurity. The company is in Chicago, Illinois.Read More
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372Undisclosed2 - 9 employeesYorkville, ILCybersecurity company CyberGhost Security, LLC is in Yorkville, Illinois. They specialize in Cybersecurity.Read More
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373Undisclosed10 - 49 employeesWheaton, ILAdvanced Intelligence Engineering, a small Cybersecurity company, is located in Wheaton, Illinois. Their services include Cybersecurity and IT managed services.Read More
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374Undisclosed2 - 9 employeesHinsdale, ILDEADCO LLC, a Cybersecurity and IT managed services company, is based in Hinsdale, Illinois. Launched in 2021, the team provides Cybersecurity and IT managed services.Read More
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375Undisclosed50 - 249 employeesChicago, ILAGB Investigative Services, a midsize Cybersecurity and IT managed services company, is in Chicago, Illinois. Their services include Cybersecurity and IT managed services.Read More
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376Undisclosed2 - 9 employeesChicago, ILSmall IT strategy consulting company Fairway IT Solutions, is in Chicago, Illinois. Their services include IT strategy consulting and cloud consulting & SI.Read More
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377Undisclosed10 - 49 employeesSt. Charles, ILFounded in 2008, RedLegg is a Cybersecurity and IT managed services company. The firm offers Cybersecurity and IT managed services, and is small.Read More
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378Undisclosed50 - 249 employeesNaperville, ILAiRo Digital Labs, a big data company, is based in Naperville, Illinois and Gurugram, India. They specialize in BI & big data consulting & SI and cloud consulting & SI and were established in 2018.Read More
Industries
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379Undisclosed250 - 999 employeesDowners Grove, ILMidsize big data company and cloud consulting & SI company 3Cloud, is located in Downers Grove, Illinois. The team provides BI & big data consulting & SI and cloud consulting & SI.Read More
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380Undisclosed50 - 249 employeesDowners Grove, ILMidsize business intelligence company Allant Group, is headquartered in Downers Grove, Illinois. Their services include BI & big data consulting & SI.Read More
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381Undisclosed10 - 49 employeesChicago, ILAleysian is a small CRM consulting and SI company. Established in 2004, the team specializes in CRM consulting and SI and Custom Software Development.Read More
Industries
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382Undisclosed250 - 999 employeesOak Brook, ILCyberTech Systems and Software, Inc is a Cybersecurity company. They offer Cybersecurity and ERP consulting and SI and are located in Oak Brook, Illinois and Redlands, California.Read More
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383Undisclosed10 - 49 employeesSchaumburg, ILECM consulting and SI and unified communications consulting & SI company IncWorx Consulting focuses on ECM consulting and SI and unified communications consulting & SI. They were established in 1998.Read More
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384Undisclosed10 - 49 employeesLisle, ILLaunched in 2020, ETHOSystems is an ERP consulting and SI company. The team provides ERP consulting and SI.Read More
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385Undisclosed50 - 249 employeesChicago, ILTruQua, an IT strategy consulting company, was launched in 2010. They specializes in IT strategy consulting and cloud consulting & SI.Read More
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386Undisclosed10 - 49 employeesChicago, ILCylon Technologies is a big data company founded in 2004. The agency provides BI & big data consulting & SI and Application Testing.Read More
Industries
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387Undisclosed10 - 49 employeesChicago, ILCatena Solutions is a business intelligence company. Their small team of employees is headquartered in Chicago, Illinois. Their team offers BI & big data consulting & SI and Business Consulting.Read More
Industries
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388Undisclosed50 - 249 employeesPeoria, ILLaunched in 2016, TADA is a big data analytics company. Headquartered in Peoria, Illinois, the team provides BI & big data consulting & SI.Read More
Industries
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389Undisclosed50 - 249 employeesChicago, ILEstablished in 2017, HEXstream is a midsize data analytics company located in Toronto, Canada and Chicago, Illinois. Their team focuses on BI & big data consulting & SI and cloud consulting & SI.Read More
Industries
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390Undisclosed250 - 999 employeesGlen Ellyn, ILInnovative Systems Group is an IT strategy consulting company. Their team is located in Glen Ellyn, Illinois and focuses on IT strategy consulting.Read More
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Check out an IT Services Company in Illinois with the most new reviews in the past 12 months.
Most Reviewed
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