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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271Undisclosed2 - 9 employeesWheaton, ILBlane, Canada Ltd. Is a Business Consulting and Marketing Strategy company. Based in Wheaton, Illinois, the firm was launched in 1983. Their team provides Business Consulting and Marketing Strategy.Read More
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272Undisclosed2 - 9 employeesLake Forest, ILFinance & Accounting Outsourcing (FAO) and Business Consulting company Capri Consulting was launched in 2003. The firm specializes in Finance & Accounting Outsourcing (FAO) and Business Consulting.Read More
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273Undisclosed2 - 9 employeesLake in the Hills, ILSmall Business Consulting and HR Consulting company Pinion Solutions Group, is based in Lake in the Hills, Illinois. The team offers Business Consulting and HR Consulting.Read More
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274Undisclosed2 - 9 employeesChicago, ILThe e-tailing group, inc. Is a Business Consulting company. Headquartered in Chicago, Illinois, the company focuses on Business Consulting and Market Research.Read More
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275Undisclosed2 - 9 employeesChicago, ILMarket Research and Business Consulting company CiTTA Partnership LLC was established in 2011. The team focuses on Market Research and Business Consulting and is in Chicago, Illinois.Read More
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276Undisclosed2 - 9 employeesChicago, ILBusiness Consulting company ShapeConnect is in Chicago, Illinois. Their services include Business Consulting and HR Consulting.Read More
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277Undisclosed2 - 9 employeesLindenhurst, ILKolz Associates, LLC, a Business Consulting and Business Valuation Services company, was founded in 2013. The agency specializes in Business Consulting and Business Valuation Services.Read More
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278Undisclosed2 - 9 employeesChicago, ILLaunched in 1994, Burger Consulting Group is a Business Consulting company. The team provides Business Consulting and IT strategy consulting.Read More
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279$100,000+10 - 49 employeesNaperville, ILFounded in 2018, Flexday Solutions LLC is a small Naperville, Illinois-based IT strategy consulting company. Their services include IT strategy consulting and cloud consulting & SI.Read More
Industries
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280Undisclosed10 - 49 employeesDes Plaines, ILMEGATECSOL Inc. , a SEO services firm, specializes in Search Engine Optimization and UX/UI Design. The firm is in Des Plaines, Illinois.Read More
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281Undisclosed50 - 249 employeesChicago, ILHeadquartered in Chicago, Illinois, Resolution Economics is a Business Consulting company. The team specializes in Business Consulting and HR Consulting.Read More
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282$1,000+2 - 9 employeesChicago, ILSMF Cost Segregation Advisors is a small Accounting company. They offer Accounting and Financial Consulting and were founded in 2025.Read More
Industries
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283$25,000+10 - 49 employeesNaperville, ILWorking Excellence is a business intelligence company launched in 2008. Their small team is in Reston, Virginia and Naperville, Illinois. The firm focuses on BI & big data consulting & SI, Artificial Intelligence, AI Consulting, Custom Software Development, and more.Read More
Industries
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284Undisclosed50 - 249 employeesChicago, ILBasis Global is a Business Consulting company launched in 1996. The team offers Business Consulting and AI Consulting and is located in London, England and Los Angeles, California.Read More
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285Undisclosed1,000 - 9,999 employeesOrland Park, ILEstablished in 1996, Version 1 is a large New York, New York-based cloud consulting & SI company. Their team offers cloud consulting & SI and Custom Software Development.Read More
Industries
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286Undisclosed2 - 9 employeesChicago, ILEstablished in 2019, Strategy Here is a Market Research and Business Consulting company. Their team offers Market Research and Business Consulting.Read More
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287Undisclosed250 - 999 employeesChicago, ILCommercial Financing company PPM America, Inc. Is based in Chicago, Illinois. The team focuses on Commercial Financing and Business Consulting.Read More
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288Undisclosed250 - 999 employeesChampaign, ILKemper CPA Group LLP is an Accounting company based in Champaign, Illinois. Their services include Accounting and Business Consulting.Read More
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289Undisclosed250 - 999 employeesSchaumburg, ILLinks Technology Solutions, Inc. Is a midsize IT managed services company located in Schaumburg, Illinois. The team specializes in IT managed services and Business Consulting.Read More
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290Undisclosed250 - 999 employeesMoline, ILSedona Technologies, a software development firm, was founded in 1986. The team focuses on Custom Software Development and Business Consulting.Read More
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291Undisclosed250 - 999 employeesChicago, ILFounded in 2016, Inspire11, a midsize Digital Strategy company, is based in Chicago, Illinois and Atlanta, Georgia. Their team provides Digital Strategy and BI & big data consulting & SI.Read More
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292Undisclosed250 - 999 employeesChicago, ILThoma Bravo is a software development company. They are in Chicago, Illinois and London, England and have midsize team. Their team offers Custom Software Development and Business Consulting.Read More
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293Undisclosed250 - 999 employeesChicago, ILVelocityEHS is a Market Research company. They were established in 1996 and focus on Market Research and Conversion Optimization.Read More
Industries
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294Undisclosed50 - 249 employeesChampaign, ILMartin Hood, an Accounting company, is in Champaign, Illinois. They specialize in Accounting and Business Consulting and were established in 1982.Read More
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295Undisclosed50 - 249 employeesAlgonquin, ILFounded in 1997, FocalPoint Coaching of Illinois is a Corporate Photography company. The team provides Corporate Photography and Business Consulting.Read More
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296Undisclosed50 - 249 employeesArlington Heights, ILTechWerks is a Corporate Training & Coaching company. In Arlington Heights, Illinois, their team provides Corporate Training & Coaching and Business Consulting.Read More
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297Undisclosed50 - 249 employeesOak Brook, ILSelden Fox, Ltd., an Accounting company, provide Accounting and Financial Advising & Planning. They were founded in 1978.Read More
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298Undisclosed50 - 249 employeesChicago, ILINSIGHT2PROFIT is a Business Consulting company. The firm is headquartered in Beachwood, Ohio and Chicago, Illinois. Their team specializes in Business Consulting and Financial Advising & Planning.Read More
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299Undisclosed50 - 249 employeesAurora, ILBusiness Consulting company Pinnakle Technologies, Inc. Provides Business Consulting and IT strategy consulting. They were established in 2009.Read More
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300Undisclosed10 - 49 employeesChicago, ILCorporate Training & Coaching company Source Consulting Group was founded in 2011. The agency focuses on Corporate Training & Coaching and Business Consulting.Read More
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