Company lists · Data refreshed September 2026

Top 25 Personalization marketing agencies based in the United States

RevenueBase identified 9,653 personalization marketing agencies headquartered in the United States as of September 2026 and tracks 114,695 professional contacts across them, including 38,169 with verified work emails and 40,501 with mobile numbers. New York is the largest hub.

This list covers personalization marketing agencies headquartered in the 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
9,653Companies
114,695Contacts tracked
38,169Verified emails
40,501Mobile numbers
Explore all 9,653 companies → Free signup · no credit card · 500 free credits

The 25 largest personalization marketing agencies based in the United States

Ranked by team size
Top 25 of 9,653 personalization marketing agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names personalization marketing agencies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
EpsilonPartial evidence
Irving, TX, United StatesHQ checked Sep 5, 20265,001-10,0009,953

“Epsilon is a global leader in data and identity with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services.”

Source: company website · checked Sep 5, 2026
2
ZoominfoIndirect evidence
Vancouver, WA, United StatesHQ checked Sep 5, 20261,001-5,0004,029

“ZoomInfo (NASDAQ: GTM) is the go-to-market platform that helps businesses find, acquire and grow their customers.”

Source: company website · checked Sep 5, 2026
3
AcxiomIndirect evidence
Conway, AR, United StatesHQ checked Sep 5, 20261,001-5,0003,241

“Acxiom puts data to work, solving complex challenges for the world’s leading brands and agencies.”

Source: company website · checked Sep 5, 2026
4
Zeta GlobalPartial evidence
New York, NY, United StatesHQ checked Sep 5, 20261,001-5,0002,595

“At Zeta Global (NYSE: ZETA), we help enterprise brands and agencies Achieve the Impossible™ with superintelligent marketing.”

Source: company website · checked Sep 5, 2026
5
LocaliqPartial evidence
New York, NY, United StatesHQ checked Sep 5, 20261,001-5,0001,534

“Grow your business with digital marketing powered by AI and local expertise.”

Source: company website · checked Sep 5, 2026
6
Intuit MailchimpPartial evidence
Atlanta, GA, United StatesHQ checked Sep 5, 20261,001-5,0001,483

“The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.”

Source: company website · checked Sep 5, 2026
7
Hearts & ScienceIndirect evidence
New York, NY, United StatesHQ checked Sep 5, 20261,001-5,0001,359

“Hearts & Science, an Omnicom Media Group agency, transforms data signals into meaningful connections between brands and consumers that drive exponential growth.”

Source: company website · checked Sep 5, 2026
8
Dialog DirectPartial evidence
Highland Park, MI, United StatesHQ checked Sep 5, 202610001+1,138

“Dialog Direct helps brands manage and personalize their multichannel, multi-touch customer journeys using data-driven marketing and customer engagement solutions.”

Source: company website · checked Sep 5, 2026
9
Data AxleIndirect evidence
Dallas, TX, United StatesHQ checked Sep 5, 20261,001-5,0001,088

“Data Axle helps clients create a foundation of clean data, find new leads, develop winning strategies, design beautiful campaigns, and can handle all day-to-day execution needs”

Source: company website · checked Sep 5, 2026
10
DemandscienceIndirect evidence
Boston, United StatesHQ checked Sep 5, 20261,001-5,0001,087

“With proprietary data and omni-channel activation like events, content, programmatic and chat, we cut through the noise to reach entire buyer groups, driving engagement and impact…”

Source: company website · checked Sep 5, 2026
11
ClearlinkPartial evidence
Salt Lake City, UT, United StatesHQ checked Sep 5, 2026501-1,000988

“Clearlink is an award-winning digital marketing, sales conversion, and technology company headquartered in Salt Lake City.”

Source: company website · checked Sep 5, 2026
12
NP DigitalIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 20261,001-5,000866

“Neil Patel has been recognized by the Wall Street Journal, Forbes, and the United Nations, to name a few, as one of the most influential and successful marketers and entrepreneurs…”

Source: company website · checked Sep 5, 2026
13
MarigoldPartial evidence
Nashville, TN, United StatesHQ checked Sep 5, 2026201-500820

“Marigold is a global marketing technology company focused on delivering relationship marketing solutions for growing organizations.”

Source: company website · checked Sep 5, 2026
14
MERGEPartial evidence
Chicago, IL, United StatesHQ checked Sep 5, 2026501-1,000816

“MERGE is a marketing and technology agency built for the intersection of health and wellness.”

Source: company website · checked Sep 5, 2026
15
Manlitics B2B ItesPartial evidence
New York, United StatesHQ checked Sep 5, 2026501-1,000750

“In an ERA of new and emerging digital mediums, we align our core expertise of today’s ever-changing technology with a clear understanding of traditional marketing methods without…”

Source: company website · checked Sep 5, 2026
16
AnteriadIndirect evidence
New York, NY, United StatesHQ checked Sep 5, 2026501-1,000740

“Data Driven.”

Source: company website · checked Sep 5, 2026
17
ClevertapIndirect evidence
San Francisco, CA, United StatesHQ checked Sep 5, 2026501-1,000702

“CleverTap is the leading all-in-one customer engagement platform that helps brands unlock limitless customer lifetime value.”

Source: company website · checked Sep 5, 2026
18
simpli.fiIndirect evidence
Fort Worth, TX, United StatesHQ checked Sep 5, 2026501-1,000680

“Simpli.fi is a real-world media platform that connects digital intent with physical movement, helping brands reach audiences in the right place, at the right moment, to drive…”

Source: company website · checked Sep 5, 2026
19
Movable INKPartial evidence
New York, NY, United StatesHQ checked Sep 5, 2026501-1,000672

“Movable Ink helps marketers create more relevant customer experiences across email, mobile, and web through data activation, AI-powered decisioning, and personalization at scale.”

Source: company website · checked Sep 5, 2026
20
On24Indirect evidence
San Francisco, CA, United StatesHQ checked Sep 5, 2026501-1,000622

“ON24, a Cvent company, is on a mission to help businesses bring their go-to-market strategy into the AI era and drive cost-effective revenue growth.”

Source: company website · checked Sep 5, 2026
21
Vertis CommunicationsIndirect evidence
Sussex, WI, United StatesHQ checked Sep 5, 202610001+605

“Vertis Communications was acquired by Quad/Graphics in January 2013.”

Source: company website · checked Sep 5, 2026
22
Affinion GroupIndirect evidence
Stamford, CT, United StatesHQ checked Sep 5, 20261,001-5,000597

“Affinion enables companies to connect and engage with their customers, creating rewarding relationships and enhancing brand loyalty.”

Source: company website · checked Sep 5, 2026
23
WunderkindPartial evidence
New York, NY, United StatesHQ checked Sep 5, 2026501-1,000521

“Wunderkind is pioneering a new category of AI agentic marketing decisioning, where identity meets AI to drive scalable performance across channel.”

Source: company website · checked Sep 5, 2026
24
Mastercard Dynamic YieldIndirect evidence
New York, NY, United StatesHQ checked Sep 5, 2026501-1,000489

“Mastercard Dynamic Yield helps businesses deliver digital customer experiences that are personalized, optimized, and synchronized.”

Source: company website · checked Sep 5, 2026
25
AmsivePartial evidence
New York, NY, United StatesHQ checked Sep 5, 2026501-1,000488

“Amsive is a data-driven performance marketing agency that enhances marketing ROI through innovative customer acquisition and engagement solutions.”

Source: company website · checked Sep 5, 2026

Showing 25 of 9,653 personalization marketing agencies based in the United States

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Personalization marketing agencies based in the United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 434 HQs
40,501Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
6,429
11-50
2,497
51-200
518
201-500
113
501-1,000
40
1,001-5,000
37
5,001-10,000
8
10001+
8

Verified emails by last verification

0–30
35,465
31–60
2,268
61–90
25
90–180
20
180+
391

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 personalization marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “personalization marketing agencies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among personalization marketing agencies, and records with no verified work email. Companies headquartered outside United States 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 an evidence 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, 38,169 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 September 5, 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.

Personalization marketing agencies by metro

Frequently asked

How many personalization marketing agencies are there based in the United States?

RevenueBase identified 9,653 personalization marketing agencies headquartered in the United States as of September 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?

Epsilon, headquartered in Irving, tops this list with the largest team on record.

Which city has the most personalization marketing agencies?

New York leads with 434 headquartered companies, followed by Los Angeles (279) and Miami (215).

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 38,169 verified decision-maker contacts tracked across these 9,653 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 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.