Top 100 Business Consulting Companies in Illinois
The Best of December 2025Looking 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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511Undisclosed2 - 9 employeesBloomington, ILFounded in 1987, Tax & Accounting Plus Inc. Is a small Accounting company. Their team offers Accounting and Business Consulting.Read More
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512Undisclosed2 - 9 employeesWaukegan, ILAapril Tax Service, Inc. Is an Accounting company. They provide Accounting and Business Consulting and were launched in 1993. The agency is in Waukegan, Illinois.Read More
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513Undisclosed2 - 9 employeesSycamore, ILCosmos Enterprises LLC is a Business Consulting company based in Sycamore, Illinois. They specialize in Business Consulting and Web Design and were launched in 2003.Read More
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514Undisclosed2 - 9 employeesRock Island, ILUpStream Consulting is a small Business Consulting company located in Rock Island, Illinois. Their services include Business Consulting and Marketing Strategy.Read More
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515Undisclosed2 - 9 employeesWilmette, ILThe Boulder Group, a Commercial Brokerage Services company, was established in 1997. The team specializes in Commercial Brokerage Services and Commercial Financing.Read More
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516Undisclosed2 - 9 employeesChicago, ILCorporate Training & Coaching company The Red Bee Group LLC was established in 2019. The firm specializes in Corporate Training & Coaching and Business Consulting.Read More
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517Undisclosed2 - 9 employeesChicago, ILMAP Strategies is a small Architectural Design company. They specialize in Architectural Design and Business Consulting and were launched in 2014.Read More
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518Undisclosed2 - 9 employeesChicago, ILChicago Consulting is a small Logistics & Supply Chain Consulting company. They provide Logistics & Supply Chain Consulting and Warehousing & Distribution and were launched in 1983.Read More
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519Undisclosed2 - 9 employeesChicago, ILSmartHire Inc., a Business Consulting company, focuses on Business Consulting and Staffing. The company is headquartered in Chicago, Illinois.Read More
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520Undisclosed2 - 9 employeesChicago, ILStromberg Sport is a branding agency. The small Chicago, Illinois-based team specializes in Branding and Marketing Strategy. The firm was founded in 2012.Read More
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521Undisclosed2 - 9 employeesNorthbrook, ILArya Consulting Partners, a small branding company, is located in Northbrook, Illinois. Their services include Branding and Marketing Strategy.Read More
Industries
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522Undisclosed2 - 9 employeesNaperville, ILGierach Law Firm is a Business Consulting company. The team focuses on Business Consulting and Corporate Law, and the agency is located in Naperville, Illinois.Read More
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523$1,000+2 - 9 employeesNorthbrook, ILChicago Executive Coaching is a Corporate Training & Coaching company. Launched in 2001, the team focuses on Corporate Training & Coaching. The agency is headquartered in Northbrook, Illinois.Read More
Industries
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524Undisclosed2 - 9 employeesGrayslake, ILHamilton Tax and Accounting LLC is an Accounting company. Their small team is headquartered in Grayslake, Illinois. Their team offers Accounting and Business Consulting.Read More
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525Undisclosed50 - 249 employeesWheaton, ILRemote Employee is a Marketing Strategy company. They are located in Wheaton, Illinois and San Fernando, Philippines, and their services include Marketing Strategy and Digital Strategy.Read More
Industries
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526UndisclosedFreelancer employeesMount Prospect, ILFletter Consulting Group, LLC, an artificial intelligence firm, was launched in 2021. The small team provides Artificial Intelligence and AI Consulting.Read More
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527Undisclosed10 - 49 employeesChicago, ILBuan Consulting is a Business Consulting company. In Annapolis, Maryland and Chicago, Illinois, their team provides Business Consulting and Market Research.Read More
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528Undisclosed50 - 249 employeesChicago, ILIAC Partners is a Business Consulting company. The Paris, France-based firm was launched in 1982. Their team focuses on Business Consulting and Market Research.Read More
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529UndisclosedFreelancer employeesElgin, ILEdison Avenue Consulting LLC, an application development firm, provides Mobile App Development and Web Design. The agency is located in Elgin, Illinois.Read More
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530$5,000+Freelancer employeesSpringfield, ILIn Springfield, Illinois, Living Water Consulting is a Fractional CFO Services company. They focus on Fractional CFO Services and Business Consulting.Read More
Industries
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531Undisclosed50 - 249 employeesChicago, ILIssoria is a Business Consulting company based in Chicago, Illinois and London, England. Launched in 2016, the team focuses on Business Consulting.Read More
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532Undisclosed2 - 9 employeesChicago, ILEstablished in 2024, UXpressed is a Product Design company. The small team provides Product Design and Business Consulting.Read More
Industries
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533Undisclosed2 - 9 employeesChicago, ILCutrara Consulting is a Business Consulting company. Headquartered in Chicago, Illinois, their team provides Business Consulting and Accounting.Read More
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534Undisclosed2 - 9 employeesMundelein, ILSimmons & Associates, Inc. Is a small Business Consulting company in Mundelein, Illinois. The team provides Business Consulting and Web Design.Read More
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535Undisclosed2 - 9 employeesChicago, ILMcCoy Consulting LLC is a Business Consulting company. Their team is based in Chicago, Illinois. The agency specializes in Business Consulting and Corporate Training & Coaching.Read More
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536Undisclosed10 - 49 employeesWestmont, ILLaunched in 1991, Maloney & Company, Ltd. Is an Accounting company. The team focuses on Accounting and Business Consulting and is located in Westmont, Illinois.Read More
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537Undisclosed10 - 49 employeesDowners Grove, ILLaunched in 2012, B2B Consulting & Training Services is a Corporate Training & Coaching and Business Consulting company. Their team offers Corporate Training & Coaching and Business Consulting.Read More
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538Undisclosed10 - 49 employeesSchaumburg, ILTegratecs Development Corp is a small Accounting and Business Consulting company based in Schaumburg, Illinois. Their services include Accounting and Business Consulting.Read More
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539Undisclosed10 - 49 employeesChicago, ILLaunched in 1997, Arts Consulting Group is a small Corporate Training & Coaching and Business Consulting company. Their services include Corporate Training & Coaching and Business Consulting.Read More
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540Undisclosed10 - 49 employeesDeerfield, ILMann Weitz & Associates is an Accounting and Business Consulting company. Established in 1994, their team focuses on Accounting and Business Consulting.Read More
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