Company lists · Data verified August 2026

Top 25 Email marketing optimization firms based in the United States

Name: Email marketing optimization firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,817 companies tracked

There are 1,817 email marketing optimization firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 12,589 professional contacts across them, including 3,616 with verified work emails and 3,839 with mobile numbers. New York is the largest hub.

This list covers email marketing optimization firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

1,817Companies

12,589Contacts tracked

3,616Verified emails

3,839Mobile numbers

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The 25 largest email marketing optimization firms based in the United States

Ranked by team size

Top 25 of 1,817 email marketing optimization firms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Intuit Mailchimp	Oakland, CA	1,001-5,000	1,557	474
2	Ebrandz LLP	New York, NY	201-500	427	115
3	Stirista	San Antonio, TX	51-200	163	113
4	Icontact	Morrisville, NC	51-200	136	40
5	Rankfast Search Marketing Company	Chicago, IL	51-200	108	12
6	Zerobounce	Santa Barbara, CA	51-200	106	59
7	Aweber	Doylestown, PA	51-200	93	26
8	Site Impact	Coral Springs, FL	51-200	80	47
9	Tribune Direct	Irwindale, CA	201-500	76	1
10	Marrina Decisions	Santa Clara, CA	51-200	69	39
11	PRIVY	Boston, MA	51-200	68	41
12	Elit-Web	Schaumburg	201-500	65	4
13	Flowium	New York	51-200	62	30
14	Brillmark	Hayward, CA	51-200	61	41
15	Giant Partners America's 1 Data Driven Marketing Agency	Thousand Oaks, CA	51-200	58	31
16	Inboxarmy	Grapevine, TX	51-200	50	20
17	Vast Bridges	Remote	51-200	29	5
18	Ilawyermarketing	San Diego, CA	51-200	28	20
19	Infodatasphere	Melville, NY	201-500	27	2
20	Forencisdata	New York	51-200	21	2
21	Real Magnet	Bethesda, MD	51-200	18	5
22	Affinnova, INC	Waltham, MA	201-500	15	1
23	Strata-G Communications	Cincinnati, OH	51-200	13	2
24	Global Email Lists	Beaverton, OR	51-200	12	1
25	BAD Marketing	Alpharetta, GA	51-200	11	6

Showing 25 of 1,817 email marketing optimization firms based in the United States

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Email marketing optimization firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 96 HQs

3,839Contacts with mobile numbers

11Emails re-verified in last 30 days

Companies by employee count

1-10

1,248

11-50

438

51-200

201-500

501-1,000

1,001-5,000

10001+

Email marketing optimization firms by metro

Metro	Companies
Email marketing optimization firms in New York	96
Email marketing optimization firms in Los Angeles	63
Email marketing optimization firms in Chicago	44
Email marketing optimization firms in Miami	39
Email marketing optimization firms in Austin	35
Email marketing optimization firms in San Francisco	31
Email marketing optimization firms in Denver	28
Email marketing optimization firms in Sheridan	27

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “email marketing optimization firms”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 11 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many email marketing optimization firms are there based in the United States?

There are 1,817 email marketing optimization firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Intuit Mailchimp, headquartered in Oakland, tops this list with the largest team on record.

Which city has the most email marketing optimization firms?

New York leads with 96 headquartered companies, followed by Los Angeles (63) and Chicago (44).

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 3,616 verified decision-maker contacts tracked across these 1,817 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.