Top 100 Business Consulting Companies in Illinois
The Best of February 2026Looking for a top consulting firm in Illinois?
Consulting firms provide in-depth knowledge and understanding in relation to the client’s industry, technology, and processes. Having this kind of business partner empowers companies to make the best decisions for the business. They provide technical and corporate assistance, helping you resolve your challenges regardless of the industry you’re in.
Consulting firms provide a wide range of services, from creating business strategies to solidifying operational processes. Take your company to the next level by partnering with a firm today. Their knowledge and expertise are valuable assets for every business.
To assist you in your search for a partner, we’ve compiled this list of the top consulting companies in Illinois. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best Illinois Business Consulting Firms
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91$1,000+10 - 49 employeesChicago, ILKaren's Green Maids is a Back Office Outsourcing company. In Chicago, Illinois, their team specializes in Back Office Outsourcing and Business Consulting.Read More
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92Undisclosed50 - 249 employeesItasca, ILBrown & Joseph, a phone answering service, was launched in 1996. They specializes in Call Center Services and Custom Software Development.Read More
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93Undisclosed10 - 49 employeesArlington Heights, ILTransforming Solutions, Inc. Is an unified communications consulting & SI company. Founded in 1995, the agency focuses on unified communications consulting & SI and ERP consulting and SI.Read More
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94Undisclosed50 - 249 employeesChicago, ILMarket Research company Winsby Inc was founded in 2003. The team provides Market Research and Marketing Strategy.Read More
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95$10,000+50 - 249 employeesArlington Heights, ILIndustrial Network Solutions is an Arlington Heights, Illinois-based public relations company. The team provides Public Relations and BI & big data consulting & SI.Read More
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96Undisclosed10 - 49 employeesSchaumburg, ILCustomer Service Outsourcing company Trinite Consulting Group LLC is in Schaumburg, Illinois and Princeton, New Jersey. They provide Customer Service Outsourcing and Staffing.Read More
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97$75,000+10 - 49 employeesChicago, ILDigital Intent is a Product Design company. The small Chicago, Illinois-based team provides Product Design and Branding. The agency was founded in 2010.Read More
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98Undisclosed50 - 249 employeesChicago, ILIT strategy consulting company Access Global Group was founded in 2011. The team provides IT strategy consulting and CRM consulting and SI and is based in Southlake, Texas and Chicago, Illinois.Read More
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99$1,000+50 - 249 employeesChicago, ILIntellectual Property Law company Trademark Chase was launched in 2023. The midsize Chicago, Illinois-based team provides Intellectual Property Law, Business Consulting, and Corporate Law.Read More
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100$1,000+10 - 49 employeesEvanston, ILZeemedicalbilling is a telephone answering service. They focus on Call Center Services and Back Office Outsourcing and were established in 2010. The firm is headquartered in Evanston, Illinois.Read More
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101Undisclosed50 - 249 employeesChicago, ILCommercial Financing company BLACK ONYX, LLC was launched in 1999. The agency focuses on Commercial Financing and Business Consulting.Read More
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102$5,000+50 - 249 employeesChicago, ILOdoni Partners CPAs is a Business Consulting company. In Chicago, Illinois and Wheaton, Illinois, the team offers Business Consulting and Finance & Accounting Outsourcing (FAO).Read More
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103$1,000+10 - 49 employeesAddison, ILZonBridge Solutions is a Marketing Strategy company located in Addison, Illinois. They provide Marketing Strategy and Business Consulting and were founded in 2025.Read More
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104Undisclosed10 - 49 employeesRiver Forest, ILIn River Forest, Illinois, Lock & Key Shop is a Business Consulting company. They specialize in Business Consulting and Back Office Outsourcing and were established in 1991.Read More
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105Undisclosed10 - 49 employeesPalos Hills, ILEstablished in 1983, Atlantic Locksmith Store is a small Business Consulting company. Their services include Business Consulting and Back Office Outsourcing.Read More
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106Undisclosed10 - 49 employeesBridgeview, ILEstablished in 1980, Advantage Locksmith Store is a Business Consulting company. The small team provides Business Consulting and Back Office Outsourcing.Read More
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107$1,000+50 - 249 employeesOak Brook, ILIntellectual Property Law company Trademark Dynasty is located in Oak Brook, Illinois. The midsize team provides Intellectual Property Law, Business Consulting, and Corporate Law. The agency was founded in 2020.Read More
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108Undisclosed50 - 249 employeesChicago, ILMessina Group Consulting is an IT strategy consulting company founded in 2013. Their services include IT strategy consulting and Business Consulting.Read More
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109Undisclosed10 - 49 employeesGlenview, ILDeeta Analytics, an IT managed services company, is headquartered in Glenview, Illinois. They provide IT managed services and E-Commerce Development and were established in 2015.Read More
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110$1,000+2 - 9 employeesChampaign, ILRDB Certified Public Accountants is an Accounting company. They were launched in 2018 and offer Accounting and Finance & Accounting Outsourcing (FAO).Read More
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111$1,000+50 - 249 employeesChicago, ILBrilliant is a Business Consulting company established in 2009. The team provides Business Consulting and Staffing and is headquartered in Chicago, Illinois and Fort Lauderdale, Florida.Read More
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112$10,000+50 - 249 employeesChicago, IL270 Strategies is a midsize Business Consulting company. Launched in 2013, the team provides Business Consulting and Corporate Training & Coaching.Read More
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113$5,000+50 - 249 employeesChicago, ILThe Cambridge Group is a Business Consulting company. The team provides Business Consulting, and the company is in Chicago, Illinois.Read More
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114Undisclosed10 - 49 employeesChicago, ILEstablished in 1994, The Family Business Consulting Group is a Business Consulting company. The firm provides Business Consulting.Read More
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115Undisclosed250 - 999 employeesChicago, ILPoint B, Inc. Is a Business Consulting company established in 1995. Their team offers Business Consulting and Marketing Strategy.Read More
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116Undisclosed10 - 49 employeesChicago, ILBusiness Consulting company Peritius Consulting, Inc. Was founded in 1989. In Chicago, Illinois, the team provides Business Consulting and Marketing Strategy.Read More
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117Undisclosed250 - 999 employeesSchaumburg, ILBlockchain and Business Consulting company ITConnectUS Inc | Schaumburg | Chicago | USA offers Blockchain and Business Consulting. They are based in Schaumburg, Illinois.Read More
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118Undisclosed10 - 49 employeesBuffalo Grove, ILNRI Relocation, Inc. Is a Business Consulting company. The Buffalo Grove, Illinois-based agency was established in 1985. Their team provides Business Consulting and HR Consulting.Read More
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119Undisclosed2 - 9 employeesChicago, IL5T Sports Group is a Business Consulting company. Located in Vancouver, Canada and Chicago, Illinois, the company offers Business Consulting.Read More
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120Undisclosed10 - 49 employeesRosemont, ILSmall Business Consulting company Insight Consulting Group, is in Rosemont, Illinois. The team specializes in Business Consulting and Market Research.Read More
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