Top 100 Systems Integrator Companies in Illinois

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Top 100 Systems Integrator Companies in Illinois

The Best of March 2026
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List of the Best Illinois System Integrators

  • 511

    (13 Reviews) 4.7

    Timeliness

    4.8

    Service Excellence

    4.7

    Value

    4.4

    Would Recommend

    4.8
    $5,000+
    250 - 999 employees
    Elk Grove Village, IL
    Summit, formerly Deft is an IT managed services company. Their midsize team is based in Alpharetta, Georgia and Elk Grove Village, Illinois. Their services include IT managed services, IT strategy consulting, and cloud consulting & SI. The company was established in 1999.
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    Clients

    Basecamp

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  • 512

    (0 Reviews)

    Not yet reviewed.

    $1,000+
    1,000 - 9,999 employees
    Bolingbrook, IL
    CES Limited is a Bolingbrook, Illinois-based cloud consulting & SI company. The team offers cloud consulting & SI and Finance & Accounting Outsourcing (FAO).
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  • 513

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Forest Park, IL
    Suyati, a CRM consulting and SI company, is headquartered in Forest Park, Illinois and Kochi, India. The team specializes in CRM consulting and SI and IT managed services.
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  • 514

    (31 Reviews) 4.8

    Timeliness

    4.7

    Service Excellence

    4.8

    Value

    4.6

    Would Recommend

    4.9
    $25,000+
    1,000 - 9,999 employees
    Chicago, IL

    ELEKS is a custom software development firm established in 1991. Their large team is in Tallinn, Estonia; L'viv, Ukraine; Berlin, Germany and Rzeszów, Poland. Their services include Custom Software Development, BI & big data consulting & SI, cloud consulting & SI, Cybersecurity, and more.

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    Clients

    BNY Mellon DPD Acino DRAX

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  • 515

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    1,000 - 9,999 employees
    Chicago, IL
    Improving is a custom software development firm in Plano, Texas and Houston, Texas. They specialize in Custom Software Development and Artificial Intelligence and were launched in 2006.
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  • 516

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Naperville, IL
    CoreFlex Solutions Inc. Is a CRM consulting and SI company based in Naperville, Illinois and पुणे, India. Launched in 2013, the team focuses on CRM consulting and SI and UX/UI Design.
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  • 517

    (2 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $50,000+
    50 - 249 employees
    Chicago, IL
    Klika is an UX design agency. They are in Las Vegas, Nevada; Chicago, Illinois and Sarajevo, Bosnia and Herzegovina and have a midsize team. Their services include ux/ui design, BI & big data consulting & SI, cloud consulting & SI, custom software development, and more. The company was founded in 2014.
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  • 518

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Chicago, IL
    Midsize cloud consulting & SI company ComTec Information Systems (IT), is headquartered in Irving, Texas and Chicago, Illinois. The team offers cloud consulting & SI and CRM consulting and SI.
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  • 519

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    Chicago, IL
    XpertTech Inc is a big data analytics company. The Boston, Massachusetts-based company was established in 2002. Their team specializes in BI & big data consulting & SI and IT staff augmentation.
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  • 520

    (1 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    4.5

    Would Recommend

    5.0
    Undisclosed
    1,000 - 9,999 employees
    Schaumburg, IL
    Fulcrum Digital is a New York, New York-based artificial intelligence development company. The large team focuses on Artificial Intelligence, AI Consulting, Generative AI, ERP consulting and SI, and more. The agency was launched in 1999.
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    Clients

    Picciano and Scahill

    Industries

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  • 521

    (12 Reviews) 4.7

    Timeliness

    4.5

    Service Excellence

    4.6

    Value

    4.7

    Would Recommend

    4.8
    $75,000+
    1,000 - 9,999 employees
    Palatine, IL
    NashTech is a large software development company. The London, England-based company was established in 2000. Their services include Custom Software Development, cloud consulting & SI, Generative AI, Digital Engineering, and more.
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  • 522

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Chicago, IL
    CloudEQ is a midsize IT strategy consulting company based in Novi, Michigan and El Segundo, California. The team provides IT strategy consulting and cloud consulting & SI.
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