Company lists · Data refreshed September 2026

Top 25 Customer engagement agencies based in the United States

Name: Customer engagement agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 7,794 companies tracked

RevenueBase identified 7,794 company matches for customer engagement agencies associated with the United States as of September 2026 and tracks 265,010 professional contacts across them, including 70,751 with verified work emails. New York is the largest hub.

This list covers company matches for customer engagement agencies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Sep 19, 2026 How this list was built

7,794Companies

265,010Contacts tracked

70,751Verified emails

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The 25 largest customer engagement agencies based in the United States

Ranked by team size

Top 25 of 7,794 company matches for customer engagement agencies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	IQOR	Exact match	Fort Lauderdale, FL, United StatesHQ recorded Sep 19, 2026	10001+	17,310 contacts →
	Exact match “iQor is a trusted partner in customer experience solutions for global brands and a portfolio company of Mill Point Capital.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	IBEX	Exact match	Washington, DC, United StatesHQ recorded Sep 19, 2026	10001+	15,457 contacts →
	Exact match “ibex delivers innovative business process outsourcing (BPO), smart digital marketing, online acquisition technology, and end-to-end customer engagement solutions to help companies…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	VML	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	10001+	15,338 contacts →
	Exact match “VML is a global powerhouse born from the unification of Wunderman Thompson and VMLY & R, two of the world's most powerful and accomplished creative agencies with complementary…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Acosta	Exact match	Jacksonville, FL, United StatesHQ recorded Sep 19, 2026	10001+	11,521 contacts →
	Exact match “Acosta brings simplicity to retail sales.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	QUAD	Exact match	Sussex, WI, United StatesHQ recorded Sep 19, 2026	10001+	9,567 contacts →
	Exact match “Quad (NYSE: QUAD) is a global marketing experience company that helps brands make direct consumer connections, from household to in-store to online.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Fusion CX	Exact match	Norcross, GA, United StatesHQ recorded Sep 19, 2026	10001+	4,785 contacts →
	Exact match “At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Merkle	Exact match	Columbia, MD, United StatesHQ recorded Sep 19, 2026	10001+	4,731 contacts →
	Exact match “Merkle, a dentsu company, powers the experience economy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Harte Hanks	Exact match	Chelmsford, MA, United StatesHQ recorded Sep 19, 2026	1,001-5,000	3,901 contacts →
	Exact match “We are The Customer Company®, a global leader in Customer Experience (CX), Omnichannel Marketing, Data Services, Customer Care, Fulfillment, and Logistics.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Klaviyo	Exact match	Boston, MA, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,789 contacts →
	Exact match “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Digitas North America	Exact match	Boston, MA, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,654 contacts →
	Exact match “Digitas is the Networked Experience Agency, built on the vision that we create magnetic experiences that earn the right for brands to exist in human networks.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	MRM	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,627 contacts →
	Exact match “MRM is a modern relationship marketing agency that builds enduring brand relationships.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	2020 Companies	Exact match	Southlake, TX, United StatesHQ recorded Sep 19, 2026	10001+	2,463 contacts →
	Exact match “2020 Companies is an award-winning retail sales, merchandising, and experiential marketing agency headquartered in Southlake, TX.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Assembly Global	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,313 contacts →
	Exact match “Assembly is a global omnichannel agency built for brands that want a more modern approach to building brands that perform.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	DDB	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	5,001-10,000	2,190 contacts →
	Exact match “The birthplace of the creative revolution, DDB is built on the belief that emotional advantage creates business advantage.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Marketing Werks	Exact match	Chicago, IL, United StatesHQ recorded Sep 19, 2026	n/a	2,182 contacts →
	Exact match “Marketing Werks has become Product Connections, a fully integrated engagement agency specializing in omnichannel solutions that build relationships between brands and consumers.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	BRAZE	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	2,142 contacts →
	Exact match “Braze is the leading customer engagement platform that empowers brands to Be Absolutely Engaging.™ Braze allows any marketer to collect and take action on any amount of data from…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	BI Worldwide	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,905 contacts →
	Exact match “BI WORLDWIDE is a global engagement agency that uses the principles of behavioral economics to produce measurable business results by designing and delivering solutions that…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Op360 Officepartners360	Exact match	Ridgefield, CT, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,777 contacts →
	Exact match “OP360, part of iQor CXBPO™, is a trusted partner in intelligent customer experience solutions for global brands.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Razorfish	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,763 contacts →
	Exact match “Hi there!” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Support Services Group	Exact match	Waco, TX, United StatesHQ recorded Sep 19, 2026	5,001-10,000	1,710 contacts →
	Exact match “Support Services Group (SSG) helps businesses accelerate growth and earn customers for life through high-touch, outsourced engagement center services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	TMS	Exact match	Chicago, IL, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,688 contacts →
	Exact match “tms unites technology and marketing and sourcing to drive transformational change for the world’s leading brands.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	MKTG	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,502 contacts →
	Exact match “For over 20 years MKTG S+E has led some of the most transformative sponsorships in sports & entertainment.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	GMR Marketing	Exact match	New Berlin, WI, United StatesHQ recorded Sep 19, 2026	501-1,000	1,497 contacts →
	Exact match “We are the Experience Agency making unforgettable stories born of humanity.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Hearts & Science	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,359 contacts →
	Exact match “Hearts & Science, an Omnicom Media Group agency, transforms data signals into meaningful connections between brands and consumers that drive exponential growth.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Birdeye	Exact match	Palo Alto, CA, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,343 contacts →
	Exact match “Birdeye is the #1 Agentic Marketing Platform for Multi-location Brands, purpose-built for multi-location brands.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “customer engagement agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 7,794 customer engagement agencies based in the United States

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Customer engagement agencies based in the United States at a glance

As of Sep 19, 2026

26.7%Verified-email coverage

34.0Average contacts per company

1-10Median size (employees)

8.4%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

4,445

11-50

2,468

51-200

560

201-500

159

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 7,794 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “customer engagement agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 70,751 professional contacts with verified work emails across the full matched dataset. 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 September 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Customer engagement agencies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “customer engagement agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many customer engagement agencies are there based in the United States?

RevenueBase identified 7,794 company matches for customer engagement agencies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

IQOR tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most customer engagement agencies?

New York leads with 654 company records, followed by Los Angeles (346) and Miami (197).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 70,751 professional contacts with verified work emails tracked across these 7,794 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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 SmartSearch, 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.