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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61$1,000+10 - 49 employeesWestchester, ILLaunched in 2022, Finest Ghostwriting is an Advertising and Business Consulting company. The small team focuses on Advertising and Business Consulting.Read More
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62$5,000+250 - 999 employeesLisle, ILProvana, a Litigation Support Services company, was established in 2009. The team focuses on Litigation Support Services and Business Consulting and is located in Lisle, Illinois.Read More
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63$1,000+50 - 249 employeesSchaumburg, ILTrademark Elite Zone is a Business Consulting company. Their team is located in Schaumburg, Illinois. The company focuses on Business Consulting and Intellectual Property Law.Read More
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64Undisclosed50 - 249 employeesChicago, ILLocated in Chicago, Illinois, Challenger, Gray & Christmas, Inc. Is a midsize HR Consulting company. The team offers HR Consulting and Business Consulting.Read More
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65$10,000+10 - 49 employeesChicago, ILSynergy Consulting Group is a Business Consulting company. They were founded in 2004, and their services include Business Consulting and Marketing Strategy.Read More
Industries
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66Undisclosed2 - 9 employeesLake Forest, ILStranberg Resource Group is a Business Consulting company. Headquartered in Lake Forest, Illinois, their team specializes in Business Consulting and Corporate Training & Coaching.Read More
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67$1,000+50 - 249 employeesElk Grove Village, ILIn Elk Grove Village, Illinois and McHenry, Illinois, Porte Brown LLC is a midsize Accounting company. Their services include Accounting and cloud consulting & SI.Read More
Industries
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68$10,000+1,000 - 9,999 employeesChicago, ILQUINNOX is an Application Testing company. The large Chicago, Illinois-based team offers Application Testing and cloud consulting & SI. The agency was launched in 2002.Read More
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69Undisclosed50 - 249 employeesNaperville, ILFounded in 2018, Analysis Prime Inc. Is a CRM consulting and SI company. The team offers CRM consulting and SI and Business Consulting.Read More
Industries
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70$1,000+2 - 9 employeesRantoul, ILUniSyn Technologies is a web design agency. They are based in Rantoul, Illinois and have small team of experts. Their services include Web Design and Web Development.Read More
Industries
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71$75,000+50 - 249 employeesChicago, ILILC North America Corp. Is an ECM consulting and SI company. Based in Chicago, Illinois, their team offers ECM consulting and SI and Business Consulting.Read More
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72$50,000+2 - 9 employeesHinsdale, ILSequence Consulting is a Business Consulting company. They are in Hinsdale, Illinois and have small team of experts. Their services include Business Consulting and Market Research.Read More
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73Undisclosed2 - 9 employeesChicago, ILRead More
Cushman & Wakefield is a Chicago-based real estate services firm founded in 1917. Their team of fewer than 10 offers commercial brokerage, commercial property management, commercial development, and commercial financial services.
Clients
Symbiont Group -
74$5,000+10 - 49 employeesChicago, ILLaunched in 1999, Inovus Technologies, a small CRM consulting and SI company, is headquartered in Chicago, Illinois. Their team provides CRM consulting and SI and Business Consulting.Read More
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75$1,000+2 - 9 employeesLa Grange Park, ILDigital Market America, an e-commerce development firm, was founded in 2018. The team focuses on E-Commerce Development and Business Consulting.Read More
Industries
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76Undisclosed50 - 249 employeesOak Brook, ILCultivate Advisors is a midsize Business Consulting company. Established in 2013, the team offers Business Consulting and Financial Advising & Planning.Read More
Industries
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77$1,000+2 - 9 employeesVernon Hills, ILTargeted Web Traffic is a Digital Strategy company. Located in Vernon Hills, Illinois, the company offers Digital Strategy and Advertising.Read More
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78$5,000+2 - 9 employeesEast Alton, ILRead More
Authority Consult is a East Alton, Illinois-based public relations company. The firm offers public relations, market research, marketing strategy, and conversion optimization and is small.The firm was founded in 2016.
Industries
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79$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
Industries
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80Undisclosed50 - 249 employeesItasca, ILBrown & Joseph, a phone answering service, was launched in 1996. They specializes in Call Center Services and Custom Software Development.Read More
Industries
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81Undisclosed10 - 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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82Undisclosed50 - 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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83$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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84Undisclosed10 - 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
Industries
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85$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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86Undisclosed50 - 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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87$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
Industries
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88Undisclosed50 - 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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89$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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90$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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