Apex Cpas & Consultants
- Managing Partner
- Company
- Happy
3 of these firms are based in St. Charles; the others serve St. Charles from towns including Schaumburg (14 mi), Geneva (3 mi) and Elgin (8 mi).
4 open weekends · 14 rated 4.5+
Data verified October 16, 2026
The 24 consulting firms listed for St. Charles, IL work with businesses on strategy, operations, growth and process. Everything shown about their service lines and the sectors they serve comes from their own websites; ratings come from public reviews.

15 of the 24 firms on this page have a rating, from 4.0 to 5.0 across 124 reviews; 14 are rated 4.5 or higher. 4 are open on weekends. 2 have a BBB rating of A or A+. Domain records put 16 websites of the firms on this page at ten or more years old; the oldest dates from 1996. 1 offers remote or virtual consultations; 2 offer a free initial consultation; 2 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 24 of the firms on this page; 20 publish a contact page; 9 list a public email and 2 take bookings online. We count these figures across the firms on this page; distances are straight-line, and hours and prices change, so confirm the details with the firm before you book a consultation.
3 of the 24 firms carry an address in St. Charles, and the remainder are listings from other towns. Plenty of consulting now runs remotely, though operations and process work still needs somebody standing in your workplace watching how it really runs.