Company lists · Data refreshed September 2026

Top 25 Lead nurturing platforms based in the United States

Name: Lead nurturing platforms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 1,632 companies tracked

RevenueBase identified 1,632 lead nurturing platforms headquartered in the United States as of September 2026 and tracks 24,759 professional contacts across them, including 7,997 with verified work emails and 6,863 with mobile numbers. New York is the largest hub.

This list covers lead nurturing platforms 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 4, 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 4, 2026 86% judged on-target in blind review

1,632Companies

24,759Contacts tracked

7,997Verified emails

6,863Mobile numbers

Unlock all 1,632 companies Free signup · no credit card · 500 free credits

The 25 largest lead nurturing platforms based in the United States

Ranked by team size

Top 25 of 1,632 lead nurturing platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names lead nurturing platforms: 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.
#	Company	Headquarters	Employees	Contacts
1	KlaviyoIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,859
	“Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Source: company website · checked Sep 4, 2026
2	Intuit MailchimpIndirect evidence	Atlanta, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,557
	“The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.” Source: company website · checked Sep 4, 2026
3	6senseIndirect evidence	San Francisco, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,426
	“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…” Source: company website · checked Sep 4, 2026
4	CiencePartial evidence	Miami, FL, United StatesHQ checked Sep 4, 2026	201-500	1,071
	“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…” Source: company website · checked Sep 4, 2026
5	ActivecampaignPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1,001-5,000	852
	“ActiveCampaign is the AI-first autonomous marketing platform built to transform how marketers, agencies, and entrepreneurs work.” Source: company website · checked Sep 4, 2026
6	Callbox INCPartial evidence	Encino, CA, United StatesHQ checked Sep 4, 2026	201-500	501
	“Callbox is the #1 trusted lead generation services and AI-Powered Growth Strategy Partner by enterprise and scaling businesses in the USA, Canada, Asia Pacific, Latin America…” Source: company website · checked Sep 4, 2026
7	SaleshiveIndirect evidence	Denver, CO, United StatesHQ checked Sep 4, 2026	51-200	455
	Source: company website · checked Sep 4, 2026
8	CallrailStrong evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	201-500	330
	“CallRail is the lead engagement platform that makes it easy for businesses to attract more leads, convert more customers, and optimize their marketing.” Source: company website · checked Sep 4, 2026
9	ListrakPartial evidence	Lititz, PA, United StatesHQ checked Sep 4, 2026	201-500	298
	“Listrak is the person-first marketing automation platform that seamlessly integrates data, identity, and cross-channel messaging to power hyper-personalized customer experiences.” Source: company website · checked Sep 4, 2026
10	Warrior PlusPartial evidence	Henderson, NV, United StatesHQ checked Sep 4, 2026	n/a	261
	“Best-in-class sales & marketing automation platform and marketplace for digital business owners and online marketers” Source: company website · checked Sep 4, 2026
11	Chili PiperPartial evidence	New York, NY, United StatesHQ checked Sep 4, 2026	51-200	237
	“Chili Piper is the all-in-one Demand Conversion Platform, used by Intuit, Spotify, Airbnb, Gong, and thousands more We are the only platform that consolidates Form Routing, Chat…” Source: company website · checked Sep 4, 2026
12	instantly.aiPartial evidence	Sheridan, WY, United StatesHQ checked Sep 4, 2026	51-200	218
	“All-in-one outreach platform for business growth.” Source: company website · checked Sep 4, 2026
13	LeandataIndirect evidence	Santa Clara, CA, United StatesHQ checked Sep 4, 2026	51-200	207
	“Help your teams align to your customer’s journey by uniting your CRM data, signals, and tools from the first buying signal to closed-won and beyond.” Source: company website · checked Sep 4, 2026
14	KEAPPartial evidence	Chandler, AZ, United StatesHQ checked Sep 4, 2026	201-500	200
	“With Keap, you'll easily capture, organize, track, and nurture all of your leads to increase sales and revenue.” Source: company website · checked Sep 4, 2026
15	Concept ServicesPartial evidence	Copley, OH, United StatesHQ checked Sep 4, 2026	51-200	186
	“Concept develops and implements comprehensive B2B lead generation and sales development solutions for companies.” Source: company website · checked Sep 4, 2026
16	SendpulsePartial evidence	New York, United StatesHQ checked Sep 4, 2026	51-200	181
	“SendPulse is an all-in-one automation platform that specializes in email, SMS, and chatbot marketing and offers a complete toolkit for creating landing pages, developing online…” Source: company website · checked Sep 4, 2026
17	ActiveprospectIndirect evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	201-500	161
	“ActiveProspect empowers marketers to identify and acquire prospects at scale.” Source: company website · checked Sep 4, 2026
18	WarmlyIndirect evidence	San Francisco, United StatesHQ checked Sep 4, 2026	51-200	138
	“Warmly makes your marketing effective by automatically identifying your ideal customers, monitoring their buying intent in real time, and engaging through the right channel at the…” Source: company website · checked Sep 4, 2026
19	CLICKIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	201-500	134
	“Click is the only complete marketing technology solution that is natively integrated with Microsoft Dynamics CRM.” Source: company website · checked Sep 4, 2026
20	NetlineStrong evidence	Newton, CA, United StatesHQ checked Sep 4, 2026	51-200	131
	“NetLine is the #1 Programmatic B2B Lead Generation Platform, empowering marketers to engage in-market buyers with targeted content and accelerate revenue growth.” Source: company website · checked Sep 4, 2026
21	CINCStrong evidence	Atlanta, GA, United StatesHQ checked Sep 4, 2026	201-500	128
	“CINC (Commissions, Inc.) is the #1 all-in-one real estate lead generation & conversion CRM platform for teams and top agents.” Source: company website · checked Sep 4, 2026
22	MyadviceIndirect evidence	Lehi, UT, United StatesHQ checked Sep 4, 2026	51-200	123
	“The MyAdvice Success Center is your AI-driven engine that combines smart marketing, intelligent automation, and operational tools to help you add revenue without increasing costs.” Source: company website · checked Sep 4, 2026
23	MailerliteIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	118
	“In 2005, we started as a web design agency, but we soon discovered email marketing and fell in love with it.” Source: company website · checked Sep 4, 2026
24	ClientifyIndirect evidence	New York, United StatesHQ checked Sep 4, 2026	51-200	118
	“Stop playing house and start closing deals.” Source: company website · checked Sep 4, 2026
25	Benchmark EmailIndirect evidence	St Louis, MO, United StatesHQ checked Sep 4, 2026	51-200	116
	“Benchmark helps busy marketers move faster and make a bigger impact with email.” Source: company website · checked Sep 4, 2026

Showing 25 of 1,632 lead nurturing platforms based in the United States

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Lead nurturing platforms based in the United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 92 HQs

6,863Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

948

11-50

507

51-200

129

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

31–60

735

61–90

4,146

90–180

3,024

180+

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 lead nurturing platforms, 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 “lead nurturing platforms”. 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 lead nurturing platforms, 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, 7,997 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 4, 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.

Lead nurturing platforms by metro

Lead nurturing platforms in New York92
Lead nurturing platforms in San Francisco61
Lead nurturing platforms in Austin48
Lead nurturing platforms in Los Angeles45
Lead nurturing platforms in Atlanta34
Lead nurturing platforms in Miami32
Lead nurturing platforms in Chicago30
Lead nurturing platforms in Boston29
Lead nurturing platforms in Houston27
Lead nurturing platforms in Dallas25
Lead nurturing platforms in San Diego25
Lead nurturing platforms in Sheridan25

Frequently asked

How many lead nurturing platforms are there based in the United States?

RevenueBase identified 1,632 lead nurturing platforms 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?

Klaviyo, headquartered in Boston, tops this list with the largest team on record.

Which city has the most lead nurturing platforms?

New York leads with 92 headquartered companies, followed by San Francisco (61) and Austin (48).

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 7,997 verified decision-maker contacts tracked across these 1,632 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 4, 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.