Top 100 Business Consulting Companies in Illinois
The Best of April 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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391Undisclosed50 - 249 employeesChicago, ILIn Chicago, Illinois, Alexander Group is a midsize Marketing Strategy company. The team offers Marketing Strategy and CRM consulting and SI.Read More
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392Undisclosed50 - 249 employeesChicago, ILGibson Consulting Group, LLC is an unified communications consulting & SI company. They offer unified communications consulting & SI and Business Consulting and are headquartered in Chicago, Illinois.Read More
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393UndisclosedFreelancer employeesAurora, ILBased in Aurora, Illinois, EMS Analytics - Effective Marketing Solutions is a small Business Consulting company. The team focuses on Business Consulting and Market Research.Read More
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394Undisclosed50 - 249 employeesRosemont, ILIn Rosemont, Illinois, Foresite Realty Partners, LLC is a midsize Commercial Brokerage Services company. The team specializes in Commercial Brokerage Services and Commercial Financing.Read More
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395Undisclosed50 - 249 employeesEast Peoria, ILMidsize Accounting company Heinold Banwart, Ltd., is headquartered in East Peoria, Illinois. Their services include Accounting and Business Consulting.Read More
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396Undisclosed50 - 249 employeesChicago, ILTopel Forman LLC is a Chicago, Illinois-based Accounting company. They offer Accounting and Financial Advising & Planning.Read More
Industries
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397UndisclosedFreelancer employeesChicago, ILSingularis Management Consulting , a Business Consulting company, is headquartered in Chicago, Illinois. The team focuses on Business Consulting and Accounting.Read More
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398Undisclosed50 - 249 employeesEffingham, ILVersatech Automation , a Business Consulting company, is located in Effingham, Illinois. Founded in 2008, the team offers Business Consulting and Engineering.Read More
Industries
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399Undisclosed50 - 249 employeesChicago, ILFounded in 2002, BigTime Software, Inc. Is a Market Research company. The team specializes in Market Research and Business Consulting.Read More
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400Undisclosed2 - 9 employeesChicago, ILCustom software development firm Writenow Agency (pty) LTD was launched in 2010. The company offers Custom Software Development and Web Development, and is small.Read More
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401$1,000+2 - 9 employeesChicago, ILViktori is a small marketing strategy company. The Chicago, Illinois-based firm was established in 2017. Their team offers marketing strategy, content marketing, and business consulting.Read More
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402Undisclosed50 - 249 employeesChicago, ILConcentric Energy Advisors is a midsize Marlborough, Massachusetts-based Business Consulting company. The team specializes in Business Consulting and Financial Consulting.Read More
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403Undisclosed10 - 49 employeesChicago, ILFounded in 2000, Mackesey and Associates, LLC is a Business Consulting company. The company offers Business Consulting.Read More
Industries
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404Undisclosed10 - 49 employeesChicago, ILRead More
Advertising company Brightfield Group is located in Chicago, Illinois. Established in 2015, the small team provides advertising, branding, product design, marketing strategy, and more.
Industries
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405$1,000+Freelancer employeesOak Park, ILHire Henri, a Product Design company, was launched in 2010. The team specializes in Product Design and Branding.Read More
Industries
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406Undisclosed1,000 - 9,999 employeesWestmont, ILStaffing company Johnson Service Group, Inc. Was launched in 1984. The large team offers Staffing and Business Consulting.Read More
Industries
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407$50,000+250 - 999 employeesChicago, ILProphet is a San Francisco, California-based branding company. Their services include Branding and Marketing Strategy.Read More
Clients
ElectroluxIndustries
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408Undisclosed2 - 9 employeesSpringfield, ILLocated in Springfield, Illinois, Quorum Consulting Group is an Accounting company. Launched in 1994, the team provides Accounting and Business Consulting.Read More
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409Undisclosed2 - 9 employeesChicago, ILNovak Costello CPA Group, LLC is an Accounting company. They were established in 2014 and focus on Accounting and Finance & Accounting Outsourcing (FAO).Read More
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410Undisclosed2 - 9 employeesNaperville, ILFounded in 2008, Pillar & Company CPAs is a small Accounting company. Their team provides Accounting and Business Consulting.Read More
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411Undisclosed2 - 9 employeesBloomington, ILHeadquartered in Bloomington, Illinois, Reiser, Chinski & Co, LLP is an Accounting company. They focus on Accounting and Business Consulting and were established in 1998.Read More
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412Undisclosed2 - 9 employeesNaperville, ILRadha Associates, Inc. Is an Accounting company. They are based in Naperville, Illinois and have small team. Their team focuses on Accounting and Business Consulting.Read More
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413Undisclosed2 - 9 employeesBradley, ILSmall Accounting company Burke Montague & Associates LLC, is based in Bradley, Illinois. The team offers Accounting and Business Consulting.Read More
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414Undisclosed2 - 9 employeesEdwardsville, ILYCG Accounting is an Accounting company. Their team is based in Edwardsville, Illinois and specializes in Accounting and Business Consulting.Read More
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415Undisclosed2 - 9 employeesChicago, ILITBS Corp. Is a Chicago, Illinois-based Accounting company. Their services include Accounting and Business Consulting.Read More
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416Undisclosed2 - 9 employeesHoffman Estates, ILBusiness Development Advisors, Inc. Is a Business Consulting company. They offer Business Consulting and Marketing Strategy and are in Hoffman Estates, Illinois.Read More
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417Undisclosed2 - 9 employeesChicago, ILENDREA LLC is a small Chicago, Illinois-based Business Consulting company. Their services include Business Consulting and Marketing Strategy.Read More
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418Undisclosed2 - 9 employeesSouth Holland, ILDreyer, Ooms & Van Drunen, Ltd. Is an Accounting company. The South Holland, Illinois-based company provides Accounting and Business Consulting.Read More
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419Undisclosed2 - 9 employeesLake Forest, ILSmall branding firm GITA & ASSOCIATES PUBLIC RELATIONS, is headquartered in Lake Forest, Illinois. Their services include Branding and Media Planning & Buying.Read More
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420Undisclosed2 - 9 employeesChicago, ILDigital Brandworks, an Advertising company, was founded in 2013. They specializes in Advertising and Content Marketing.Read More
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