Company lists · Data refreshed October 2026

Top 25 Email outreach automation companies based in the United States

RevenueBase identified 1,096 company matches for email outreach automation companies associated with the United States as of October 2026 and tracks 16,486 professional contacts across them, including 4,773 with verified work emails. New York is the largest hub.

This list covers company matches for email outreach automation companies 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 October 12, 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 Oct 12, 2026 How this list was built
1,096Companies
16,486Contacts tracked
4,773Verified emails
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The 25 largest email outreach automation companies based in the United States

Ranked by team size
Top 25 of 1,096 company matches for email outreach automation companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Francisco, CA, United StatesHQ recorded Oct 12, 20261,001-5,0001,440 contacts →

Exact match

“6sense is on a mission to revolutionize the way B2B organizations create revenue by predicting customers most likely to buy and recommending the best course of action to engage…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2Exact matchMiami, FL, United StatesHQ recorded Oct 12, 2026201-5001,119 contacts →

Exact match

“CIENCE Technologies, Inc, founded in 2015 and headquartered in Denver, CO, is a pioneering global company in lead generation software and services, committed to transforming the…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3Exact matchSan Francisco, CA, United StatesHQ recorded Oct 12, 2026501-1,0001,100 contacts →

Exact match

“Apollo.io is the AI-powered end-to-end go-to-market platform that empowers sales, marketing, and revenue teams to find prospects, engage customers, and close deals with…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4Exact matchChicago, IL, United StatesHQ recorded Oct 12, 20261,001-5,000855 contacts →

Exact match

“ActiveCampaign is the AI-first autonomous marketing platform built to transform how marketers, agencies, and entrepreneurs work.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5Exact matchSan Francisco, CA, United StatesHQ recorded Oct 12, 2026501-1,000525 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6Exact matchAtlanta, GA, United StatesHQ recorded Oct 12, 2026201-500342 contacts →

Exact match

“CallRail is the lead engagement platform that makes it easy for businesses to attract more leads, convert more customers, and optimize their marketing.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7Exact matchSan Francisco, United StatesHQ recorded Oct 12, 202651-200274 contacts →

Exact match

“Artisan builds AI employees.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8Exact matchSheridan, WY, United StatesHQ recorded Oct 12, 202651-200239 contacts →

Exact match

“All-in-one outreach platform for business growth.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9Exact matchNew York, NY, United StatesHQ recorded Oct 12, 202651-200232 contacts →

Exact match

“Outbound is broken when it’s built only on volume.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10Exact matchPortland, OR, United StatesHQ recorded Oct 12, 2026201-500217 contacts →

Exact match

“Act-On Software provides the innovative marketing automation platform for marketers who think big and act boldly.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11Exact matchNew York, United StatesHQ recorded Oct 12, 202651-200178 contacts →

Exact match

“SendPulse is an AI-driven marketing platform that helps scaling businesses automate email and chatbot conversations.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12Exact matchSan Diego, CA, United StatesHQ recorded Oct 12, 202651-200159 contacts →

Exact match

“Cordial automates billions of data-driven, cross-channel messages to create lifetime customer connections for leading companies.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13Exact matchMorrisville, NC, United StatesHQ recorded Oct 12, 202651-200144 contacts →

Exact match

“We believe powerful connections propel business growth.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14Exact matchSan Francisco, CA, United StatesHQ recorded Oct 12, 202651-200135 contacts →

Exact match

“In 2005, we started as a web design agency, but we soon discovered email marketing and fell in love with it.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15Exact matchNewton, MA, United StatesHQ recorded Oct 12, 202651-200130 contacts →

Exact match

“Selling.com is a pipeline generation platform that enables sales teams to execute and scale their outbound growth through accurate sales intelligence, sales outreach, and AI…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16Exact matchPalo Alto, CA, United StatesHQ recorded Oct 12, 202651-200129 contacts →

Exact match

“Launching AI Adaptive Roleplays - Build Cold Call Mastery with AI Roleplays That Create Continuous Training Pathways After every calling session, AI spots new skill gaps and…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17Exact matchSt. Louis, MO, United StatesHQ recorded Oct 12, 202651-200117 contacts →

Exact match

“Benchmark helps busy marketers move faster and make a bigger impact with email.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18Exact matchLehi, UT, United StatesHQ recorded Oct 12, 202651-200116 contacts →

Exact match

“MyAdvice offers an AI-powered growth system that reduces cost and effort while driving revenue and producing valuable insights.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19Exact matchSan Francisco, CA, United StatesHQ recorded Oct 12, 202651-200113 contacts →

Exact match

“Building AI for outbound sellers.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20Exact matchSan Antonio, TX, United StatesHQ recorded Oct 12, 202651-200111 contacts →

Exact match

“Plataforma de Marketing Multicanal, simple y potenciado por IA.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21Exact matchSan Francisco, CA, United StatesHQ recorded Oct 12, 202651-20096 contacts →

Exact match

“The Brain Behind Your Go-to-Market UserGems is the AI command center for GTM teams.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22Exact matchLos Gatos, CA, United StatesHQ recorded Oct 12, 2026201-50094 contacts →

Exact match

“At ConnectAndSell, we’re revolutionizing sales acceleration with our Human + AI technology, empowering sales teams to drive more meaningful conversations and build stronger…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23Exact matchSheridan, WY, United StatesHQ recorded Oct 12, 202651-20092 contacts →

Exact match

“Unlock 700M+ verified contacts and power your outreach with the ability for sending and warmup.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24Exact matchSan Francisco, WA, United StatesHQ recorded Oct 12, 202651-20091 contacts →

Exact match

“Meet the world's first AI-native sales engagement platform.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25Exact matchDoylestown, PA, United StatesHQ recorded Oct 12, 202651-20090 contacts →

Exact match

“For over 20 years, AWeber has helped entrepreneurs and small business owners connect with their prospects and customers through powerfully-simple email marketing solutions.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

Showing 25 of 1,096 email outreach automation companies based in the United States

See the full list, filter by size, metro and specialty, and access 4,773 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Email outreach automation companies based in the United States at a glance

As of Oct 12, 2026
29.0%Verified-email coverage
15.0Average contacts per company
1-10Median size (employees)
7.8%Largest-city concentration · New York
Oct 12, 2026Page data refreshed

Companies by employee count

1-10
682
11-50
322
51-200
64
201-500
15
501-1,000
6
1,001-5,000
6
10001+
1

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 1,096 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 “email outreach automation companies” 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 4,773 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 October 12, 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.

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 “email outreach automation companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many email outreach automation companies are there based in the United States?

RevenueBase identified 1,096 company matches for email outreach automation companies associated with the United States as of October 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?

6sense tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most email outreach automation companies?

New York leads with 85 company records, followed by San Francisco (85) and Sheridan (51).

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 4,773 professional contacts with verified work emails tracked across these 1,096 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 October 12, 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.