Company lists · Data verified August 2026

Top 25 Cold email agencies based in the United States

Name: Cold email agencies 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 413 companies tracked

There are 413 cold email agencies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 3,520 professional contacts across them, including 688 with verified work emails and 579 with mobile numbers. New York is the largest hub.

This list covers cold email 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. Data current as of August 28, 2026.

413Companies

3,520Contacts tracked

688Verified emails

579Mobile numbers

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The 25 largest cold email agencies based in the United States

Ranked by team size

Top 25 of 413 cold email agencies 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	Saleshive	Denver, CO	51-200	455	56
2	instantly.ai	Sheridan, WY	51-200	218	50
3	Warmly	San Francisco	51-200	138	42
4	Icontact	Morrisville, NC	51-200	136	40
5	Benchmark Email	St Louis, MO	51-200	116	47
6	Aweber	Doylestown, PA	51-200	93	26
7	Litmus	San Mateo, CA	51-200	71	17
8	Marrina Decisions	Santa Clara, CA	51-200	69	39
9	Reachoutly LLC	Sheridan, WY	11-50	68	1
10	Salesar	Dover, DE	51-200	59	15
11	Inboxarmy	Grapevine, TX	51-200	50	20
12	Resource Exchange Group	Towson, MD	51-200	48	3
13	Leadbird GET B2B Leads On Demand	Dallas, TX	11-50	41	14
14	Aprésapio Media	Los Angeles, CA	11-50	21	1
15	Xgrowth LLC	Wilmington, DE	11-50	19	1
16	Parakeet	Boston, MA	51-200	15	4
17	Acceler8now	Austin	11-50	15	3
18	automailer.io	Chicago, IL	11-50	14	4
19	Bluebird Sales LLC	Austin, TX	11-50	13	7
20	Email Broadcast	Seattle, WA	11-50	12	6
21	Rejoiner	Newport, RI	11-50	11	6
22	Salesrobot	New York, NY	11-50	10	6
23	Sellup	New York	11-50	10	3
24	mails.ai	Sheridan, WY	11-50	8	1
25	Inbox Group Email Marketing	Grapevine, TX	11-50	8	1

Showing 25 of 413 cold email agencies based in the United States

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Cold email agencies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 43 HQs

579Contacts with mobile numbers

7Emails re-verified in last 30 days

Companies by employee count

1-10

273

11-50

110

51-200

201-500

501-1,000

Cold email agencies by metro

Metro	Companies
Cold email agencies in New York	43
Cold email agencies in Sheridan	29
Cold email agencies in Austin	20
Cold email agencies in San Francisco	15
Cold email agencies in Miami	11
Cold email agencies in Atlanta	9
Cold email agencies in Los Angeles	9

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 “cold email agencies”, 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; 7 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 cold email agencies are there based in the United States?

There are 413 cold email agencies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Saleshive, headquartered in Denver, tops this list with the largest team on record.

Which city has the most cold email agencies?

New York leads with 43 headquartered companies, followed by Sheridan (29) and Austin (20).

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 688 verified decision-maker contacts tracked across these 413 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.