Company lists · Data refreshed August 2026

Top 25 Advertising agencies based in Chicago, United States

Name: Advertising agencies based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 550 companies tracked

RevenueBase identified 550 advertising agencies headquartered in Chicago, United States as of August 2026 and tracks 27,409 professional contacts across them, including 5,356 with verified work emails and 6,003 with mobile numbers. New York is the largest hub.

This list covers advertising agencies headquartered in Chicago, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase Smart Search rating on every row Refreshed Aug 30, 2026 86% judged on-target in blind review

550Companies

27,409Contacts tracked

5,356Verified emails

6,003Mobile numbers

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The 25 largest advertising agencies based in Chicago, United States

Ranked by team size

Top 25 of 550 advertising agencies based in Chicago, United States, ranked by team size, largest first. Data refreshed Aug 30, 2026. RevenueBase Smart Search rates how each company's information relates to advertising agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Starcom	Indirect evidence	Chicago, IL, United States	5,001-10,000	5,574 contacts →
	Indirect evidence “With a history that dates back over 80 years, Starcom is a global communications planning and media leader.” Source: RevenueBase Database · checked Aug 30, 2026
2	LEO Burnett	Indirect evidence	Chicago, IL, United States	5,001-10,000	5,394 contacts →
	Indirect evidence “Leo Burnett is a communications agency powered by its HumanKind operating system, with the belief that creativity, data and technology work together to transform human behavior…” Source: RevenueBase Database · checked Aug 30, 2026
3	Thompson	Indirect evidence	Chicago, IL, United States	5,001-10,000	3,576 contacts →
	Indirect evidence “J.” Source: RevenueBase Database · checked Aug 30, 2026
4	Spark Foundry	Indirect evidence	Chicago, IL, United States	1,001-5,000	2,882 contacts →
	Indirect evidence “As one of the fastest-growing global media agency networks, Spark Foundry is not beholden to legacy.” Source: RevenueBase Database · checked Aug 30, 2026
5	Marketing Werks	Indirect evidence	Chicago, IL, United States	n/a	2,176 contacts →
	Indirect evidence “Marketing Werks has become Product Connections, a fully integrated engagement agency specializing in omnichannel solutions that build relationships between brands and consumers.” Source: RevenueBase Database · checked Aug 30, 2026
6	KWT Global	Indirect evidence	Chicago, IL, United States	51-200	363 contacts →
	Indirect evidence “KWT Global and HUNTER have joined forces to create a new marketing and communications powerhouse under the HUNTER banner.” Source: RevenueBase Database · checked Aug 30, 2026
7	Abelsontaylor Group	Indirect evidence	Chicago, IL, United States	201-500	267 contacts →
	Indirect evidence “With AbelsonTaylor Group, ROI is what you’ll get.” Source: RevenueBase Database · checked Aug 30, 2026
8	Empower Media	Indirect evidence	Chicago, IL, United States	201-500	213 contacts →
	Indirect evidence “We are Empower® America’s largest woman-owned media agency From the day we opened our doors in 1985, Empower has challenged the media status quo.” Source: RevenueBase Database · checked Aug 30, 2026
9	Energy Bbdo	Indirect evidence	Chicago, IL, United States	201-500	152 contacts →
	Indirect evidence “Energy BBDO is a global creative agency known for energizing people and brands.” Source: RevenueBase Database · checked Aug 30, 2026
10	Highdive	Indirect evidence	Chicago, IL, United States	51-200	137 contacts →
	Indirect evidence “Highdive (highdiveus.com) is an independently owned, EMMY-nominated, full-service creative agency located in Chicago (HQ) and New York City.” Source: RevenueBase Database · checked Aug 30, 2026
11	Paragon Marketing Group	Indirect evidence	Chicago, IL, United States	51-200	133 contacts →
	Indirect evidence “Paragon Marketing Group, LLC (PMG) is an engaging team of dedicated professionals passionate about the sports and entertainment marketing industry.” Source: RevenueBase Database · checked Aug 30, 2026
12	TRIAD	Indirect evidence	Chicago, IL, United States	201-500	117 contacts →
	Indirect evidence “Triad is a global media, creative and technology partner that specializes in growing brands in all retail environments.” Source: RevenueBase Database · checked Aug 30, 2026
13	HY Connect	Indirect evidence	Chicago, IL, United States	51-200	102 contacts →
	Indirect evidence “HY Connect is now part of the MERGE Network, which in 2018 combined five agencies: HY Connect, MERGE Design + Interactive, Partners & Simons, Avid Design, and Dodge Communications.” Source: RevenueBase Database · checked Aug 30, 2026
14	The Food Group	Indirect evidence	Chicago, IL, United States	51-200	100 contacts →
	Indirect evidence “The Food Group is a premier full-service agency that blends food, culture and marketing expertise to deliver powerful integrated ideas that feed our clients’ success.” Source: RevenueBase Database · checked Aug 30, 2026
15	Mabbly	Indirect evidence	Chicago, IL, United States	51-200	83 contacts →
	Indirect evidence “Mabbly is a Chicago-based intelligence-driven digital marketing agency and go-to-market partner for modern brands navigating the messy middle of growth.” Source: RevenueBase Database · checked Aug 30, 2026
16	Upshot Agency	Indirect evidence	Chicago, IL, United States	51-200	83 contacts →
	Indirect evidence “We use creativity, digital fluency, and cultural agility to lead brands through a world of change and unleash their full potential.” Source: RevenueBase Database · checked Aug 30, 2026
17	Bbc, A B2B Creative Agency	Indirect evidence	Chicago, IL, United States	51-200	79 contacts →
	Indirect evidence “BBC is a B2B creative agency.” Source: RevenueBase Database · checked Aug 30, 2026
18	Mindstream Media Group	Indirect evidence	Chicago, IL, United States	51-200	78 contacts →
	Indirect evidence “Founded in 1995, Mindstream Media Group (MMG) is a full-service media agency that believes content and context matter.” Source: RevenueBase Database · checked Aug 30, 2026
19	MOZ WEB Media LLC	Indirect evidence	Chicago, IL, United States	51-200	74 contacts →
	Indirect evidence “MozWebMedia is an end-to-end creative solution provider which offers tailor made services for every brand.” Source: RevenueBase Database · checked Aug 30, 2026
20	AL Media Strategy	Indirect evidence	Chicago, IL, United States	51-200	70 contacts →
	Indirect evidence “Recognized nationally for our award-winning creative and break-through victories, AL Media has taken on some of the highest profile, against-the-odds challenges in electoral…” Source: RevenueBase Database · checked Aug 30, 2026
21	Envisionit	Indirect evidence	Chicago, IL, United States	51-200	69 contacts →
	Indirect evidence “Envisionit is an award-winning, full-service digital marketing agency headquartered in Chicago with in-house Media, Creative, Tech, Strategy and Analytics teams.” Source: RevenueBase Database · checked Aug 30, 2026
22	Eleven, INC	Indirect evidence	Chicago, IL, United States	51-200	69 contacts →
	Indirect evidence “Eleven develops category-defining ideas that are unconstrained by medium.” Source: RevenueBase Database · checked Aug 30, 2026
23	Eicoff	Indirect evidence	Chicago, IL, United States	51-200	68 contacts →
	Indirect evidence “Transform your marketing into a growth engine.” Source: RevenueBase Database · checked Aug 30, 2026
24	Thunder Tech	Indirect evidence	Chicago, IL, United States	51-200	50 contacts →
	Indirect evidence “thunder:tech is a full-service marketing agency for midsize brands, known for delivering remarkable growth by blending creativity and technology.” Source: RevenueBase Database · checked Aug 30, 2026
25	Fluent360	Indirect evidence	Chicago, IL, United States	51-200	49 contacts →
	Indirect evidence “fluent360 is a forward-thinking, full-service agency fueled by deep audience expertise and fearless creativity.” Source: RevenueBase Database · checked Aug 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: advertising agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names advertising agencies.
Partial evidence: Its own public description names part of advertising agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name advertising agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 550 advertising agencies based in Chicago, United States

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Advertising agencies based in Chicago, United States at a glance

As of Aug 30, 2026

19.5%Verified-email coverage

21.9%Mobile-number coverage

49.8Average contacts per company

1-10Median size (employees)

317.6%Largest-city concentration · New York

Aug 30, 2026Page data refreshed

Companies by employee count

1-10

350

11-50

131

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among advertising agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Chicago, United States whose own description of what they do matches “advertising agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names advertising agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among advertising agencies, and records with no verified work email. Companies headquartered outside Chicago are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 5,356 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on August 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Advertising agencies by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names advertising agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many advertising agencies are there based in Chicago, United States?

RevenueBase identified 550 advertising agencies headquartered in Chicago, United States as of August 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Starcom, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most advertising agencies?

New York leads with 1747 headquartered companies, followed by Los Angeles (1195) and Chicago (550).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 5,356 verified decision-maker contacts tracked across these 550 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.