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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61Undisclosed50 - 249 employeesGlenview, ILRead More
Weiss & Company LLC was founded in 1968 and is headquartered in Glenview, Ill. They have a team of around 58 employees, focusing on tax preparation, bookkeeping, and payroll.
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62Undisclosed50 - 249 employeesChicago, ILRead More
ERP consulting and SI company Paro is in Chicago, Illinois. They offer ERP consulting and SI, business consulting, finance & accounting outsourcing (FAO), and accounting and were founded in 2015.
Industries
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63$5,000+2 - 9 employeesChicago, ILGround Floor Partners is a small Business Consulting company founded in 2002. Their team offers Business Consulting and Market Research.Read More
Industries
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64$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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65$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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66$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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67Undisclosed50 - 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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68$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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69Undisclosed2 - 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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70$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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71$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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72Undisclosed50 - 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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73$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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74$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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75Undisclosed50 - 249 employeesChicago, ILWorkaware is an Advertising company. Headquartered in Chicago, Illinois, the company was established in 2000. Their team focuses on Advertising and Web Development.Read More
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76$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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77Undisclosed2 - 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
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78$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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79Undisclosed10 - 49 employeesChicago, ILAll County Locksmith Store is a Business Consulting company. Located in Chicago, Illinois, their team focuses on Business Consulting and Back Office Outsourcing.Read More
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80Undisclosed10 - 49 employeesChicago, ILInterstate Locksmith Shop, a Business Consulting company, was founded in 1981. The agency offers Business Consulting and Back Office Outsourcing.Read More
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81Undisclosed10 - 49 employeesHickory Hills, ILAffordable Locksmith Services is a Hickory Hills, Illinois-based Business Consulting company. Their services include Business Consulting and Back Office Outsourcing.Read More
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82Undisclosed10 - 49 employeesHomewood, ILIn Homewood, Illinois, Top Locksmith Services is a Business Consulting company. They provide Business Consulting and Back Office Outsourcing.Read More
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83$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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84Undisclosed50 - 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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85$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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86$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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87Undisclosed10 - 49 employeesChicago, ILVillage Locksmith Store is a Business Consulting company. They provide Business Consulting and Back Office Outsourcing and are located in Chicago, Illinois.Read More
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88Undisclosed10 - 49 employeesChicago, ILEstablished in 1989, Union Locksmith Store is a Business Consulting company. In Chicago, Illinois, the team specializes in Business Consulting and Back Office Outsourcing.Read More
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89Undisclosed10 - 49 employeesSchiller Park, ILLocksmith & Lock Store is a small Schiller Park, Illinois-based Business Consulting company. The team provides Business Consulting and Back Office Outsourcing.Read More
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90Undisclosed10 - 49 employeesWestmont, ILGold Locksmith Store, a Business Consulting company, is headquartered in Westmont, Illinois. They focus on Business Consulting and Back Office Outsourcing.Read More
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