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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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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62$10,000+2 - 9 employeesOak Brook, ILPinnacle Shift Partners, a Business Consulting company, was established in 2025. Headquartered in Oak Brook, Illinois, the team offers Business Consulting and Corporate Training & Coaching.Read More
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63Undisclosed50 - 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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64$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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65$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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66$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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67$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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68Undisclosed50 - 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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69$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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70Undisclosed2 - 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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71$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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72$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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73Undisclosed50 - 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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74$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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75$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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76Undisclosed50 - 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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77$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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78Undisclosed2 - 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 -
79$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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80Undisclosed10 - 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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81Undisclosed10 - 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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82Undisclosed10 - 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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83Undisclosed10 - 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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84Undisclosed10 - 49 employeesRiver Forest, ILIn River Forest, Illinois, Lock & Key Shop is a Business Consulting company. They specialize in Business Consulting and Back Office Outsourcing and were established in 1991.Read More
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85Undisclosed10 - 49 employeesPalos Hills, ILEstablished in 1983, Atlantic Locksmith Store is a small Business Consulting company. Their services include Business Consulting and Back Office Outsourcing.Read More
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86Undisclosed10 - 49 employeesVilla Park, ILLocksmith Master Shop is a small Villa Park, Illinois-based Business Consulting company. The team focuses on Business Consulting and Back Office Outsourcing.Read More
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87Undisclosed10 - 49 employeesWillowbrook, ILGeneral Locksmith Store is a Business Consulting company launched in 1981. The team specializes in Business Consulting and Back Office Outsourcing and is based in Willowbrook, Illinois.Read More
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88Undisclosed10 - 49 employeesHinsdale, ILFather Son Locksmith Shop is a Business Consulting company. Founded in 1987, their team focuses on Business Consulting and Back Office Outsourcing.Read More
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89Undisclosed10 - 49 employeesPalatine, ILEstate Locksmith Store, a Business Consulting company, is headquartered in Palatine, Illinois. Their services include Business Consulting and Back Office Outsourcing.Read More
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90Undisclosed10 - 49 employeesChicago, ILLaunched in 1999, Usa Locksmith Service is a small Business Consulting company. Their services include Business Consulting and Back Office Outsourcing.Read More
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