> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/541613/illinois/ # NAICS 541613 companies in Illinois Companies with NAICS code 541613 (Marketing Consulting Services) headquartered in Illinois, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 541613 companies in Illinois by headcount range include Activecampaign, Cheetah Digital and Gorilla Group. NAICS 541613 is the code for Marketing Consulting Services. Among those counted, they are mostly very small: 63% have 50 or fewer employees. ## Which NAICS 541613 companies are in Illinois? The biggest by headcount range include Activecampaign, Cheetah Digital, Gorilla Group, Impact Networking and Aprimo. NAICS 541613 is the code for Marketing Consulting Services. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Activecampaign | Chicago | 1,001 to 5,000 | | Cheetah Digital | Chicago | 1,001 to 5,000 | | Gorilla Group | Chicago | 1,001 to 5,000 | | Impact Networking | Lake Forest | 501 to 1,000 | | Aprimo | Chicago | 201 to 500 | | Aarete | Chicago | 201 to 500 | | Cgn Global | Chicago | 201 to 500 | | The Calmark Group | Bedford Park | 201 to 500 | | Intersport | Chicago | 51 to 200 | | Technomic | Chicago | 51 to 200 | | Sales Empowerment Group | Chicago | 51 to 200 | | Shaker Recruitment Marketing | Oak Park | 51 to 200 | | Mabbly | Chicago | 51 to 200 | | Creata | Oakbrook Terrace | 51 to 200 | | Upcity | Chicago | 51 to 200 | | Midan Marketing | Chicago | 51 to 200 | | Straight North | Downers Grove | 51 to 200 | | Business Marketing Engine | Chardon | 51 to 200 | | Cloudmasonry | Chicago | 51 to 200 | | Nslead B2b Global | Naperville | 51 to 200 | | Launch Digital Marketing | Naperville | 51 to 200 | | Jumpfly | Hoffman Estates | 51 to 200 | | Exact Data | Chicago | 51 to 200 | | Paperpicks | Schaumburg | 51 to 200 | | Npn360 | Bannockburn | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## How big are they? 63% of the NAICS 541613 companies counted in Illinois have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of NAICS 541613 companies in Illinois.** Seven columns for the share of counted NAICS 541613 companies in Illinois in each employee range: 11 to 50 63%, 51 to 200 27%, 201 to 500 5%, 501 to 1,000 1%, 1,001 to 5,000 4%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted NAICS 541613 companies in Illinois in each employee range.* ## How old are they? Most were founded in the 2010s (41%), then the 2000s (27%). **Figure: When NAICS 541613 companies in Illinois were founded.** Eight columns for the share of counted NAICS 541613 companies in Illinois founded in each era: Before 1960 3%, 1960s 4%, 1970s 3%, 1980s 4%, 1990s 13%, 2000s 27%, 2010s 41%, 2020s 5%. *Share of counted NAICS 541613 companies in Illinois by the era they were founded in, for the ones that list a founding year.* ## How Illinois compares with the rest of the country - 63% of NAICS 541613 companies in Illinois have 50 or fewer employees, against 72% across NAICS 541613 companies nationwide. ## How do you reach the people at these Illinois companies? The people to talk to are usually partners, practice leaders and heads of operations. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 541613 in Illinois ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the partners, practice leaders and heads of operations at companies with NAICS code 541613 in Illinois, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore About the code: [NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/). About the place: [companies in Illinois](https://enrich.chat/companies-in/illinois/). NAICS 541613 in other states: [California](https://enrich.chat/naics/541613/california/)[New York](https://enrich.chat/naics/541613/new-york/)[Florida](https://enrich.chat/naics/541613/florida/)[Texas](https://enrich.chat/naics/541613/texas/)[Georgia](https://enrich.chat/naics/541613/georgia/)[Ohio](https://enrich.chat/naics/541613/ohio/)[Colorado](https://enrich.chat/naics/541613/colorado/)[Pennsylvania](https://enrich.chat/naics/541613/pennsylvania/)[North Carolina](https://enrich.chat/naics/541613/north-carolina/)[Virginia](https://enrich.chat/naics/541613/virginia/) Other NAICS codes in Illinois: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/illinois/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/illinois/)[NAICS 722511: Full-Service Restaurants](https://enrich.chat/naics/722511/illinois/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/illinois/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/illinois/)[NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/illinois/)[NAICS 488510: Freight Transportation Arrangement](https://enrich.chat/naics/488510/illinois/)[NAICS 238220: Plumbing, Heating, and Air-Conditioning](https://enrich.chat/naics/238220/illinois/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/illinois/)[NAICS 621999: All Other Miscellaneous Ambulatory](https://enrich.chat/naics/621999/illinois/) ## Frequently asked questions ### Which NAICS 541613 companies are in Illinois? The biggest by headcount range include Activecampaign, Cheetah Digital, Gorilla Group, Impact Networking and Aprimo. The page lists 25 with links to their profiles where we have them. ### What is NAICS 541613? NAICS 541613 is the code for Marketing Consulting Services, in sector 54: Professional, Scientific, and Technical Services. ### Which cities in Illinois have the most? Chicago (51%), Naperville (5%) and Oakbrook Terrace (4%) lead among the companies counted. ## Try this prompt Find the people at NAICS 541613 companies in Illinois ```text Use www.enrich.chat to find the partners, practice leaders and heads of operations at companies with NAICS code 541613 in Illinois, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 541613 in California](https://enrich.chat/naics/541613/california/) - [NAICS 541613 in New York](https://enrich.chat/naics/541613/new-york/) - [NAICS 541613 in Florida](https://enrich.chat/naics/541613/florida/) - [NAICS 541613 in Texas](https://enrich.chat/naics/541613/texas/) - [NAICS 541511 in Illinois](https://enrich.chat/naics/541511/illinois/) - [NAICS 541512 in Illinois](https://enrich.chat/naics/541512/illinois/) - [NAICS 722511 in Illinois](https://enrich.chat/naics/722511/illinois/) - [NAICS 531210 in Illinois](https://enrich.chat/naics/531210/illinois/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)