Company lists · Data refreshed September 2026

Top 25 Lead nurturing software companies based in the United States

Name: Lead nurturing software companies 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 2,019 companies tracked

RevenueBase identified 2,019 lead nurturing software companies headquartered in the United States as of September 2026 and tracks 25,942 professional contacts across them, including 6,071 with verified work emails and 5,926 with mobile numbers. New York is the largest hub.

This list covers lead nurturing software companies 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

2,019Companies

25,942Contacts tracked

6,071Verified emails

5,926Mobile numbers

Unlock all 2,019 companies Free signup · no credit card · 500 free credits

The 25 largest lead nurturing software companies based in the United States

Ranked by team size

Top 25 of 2,019 lead nurturing software companies 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 software companies: 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	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
2	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
3	CienceStrong 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
4	ActivecampaignIndirect 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
5	MarigoldIndirect evidence	Nashville, TN, United StatesHQ checked Sep 4, 2026	201-500	818
	“Marigold is a global marketing technology company focused on delivering relationship marketing solutions for growing organizations.” 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	CallrailPartial 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	instantly.aiIndirect 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
10	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
11	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
12	SendpulseIndirect 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
13	RightwaveIndirect evidence	San Jose, CA, United StatesHQ checked Sep 4, 2026	51-200	156
	“RightWave provides Marketing Automation Services for B2B companies.” Source: company website · checked Sep 4, 2026
14	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
15	B2B RocketIndirect evidence	Lewes, DE, United StatesHQ checked Sep 4, 2026	51-200	135
	“B2B Rocket, a Blackpearl Group company (NZE: BPG, publicly traded), is on a mission to empower 1M+ businesses worldwide with AI-powered sales automation.” Source: company website · checked Sep 4, 2026
16	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
17	NetlinePartial 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
18	CINCPartial 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
19	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
20	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
21	Launch LeadsPartial evidence	Salt Lake City, UT, United StatesHQ checked Sep 4, 2026	51-200	112
	“Why Launch Leads?” Source: company website · checked Sep 4, 2026
22	LeadiqIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	111
	“Build pipeline with confidence.” Source: company website · checked Sep 4, 2026
23	BoomtownStrong evidence	Charleston, SC, United StatesHQ checked Sep 4, 2026	201-500	107
	“BoomTown is a software platform designed to help real estate professionals generate leads, manage contacts, and run their business better.” Source: company website · checked Sep 4, 2026
24	Genesis Digital, LLCPartial evidence	Las Vegas, NV, United StatesHQ checked Sep 4, 2026	51-200	104
	“Genesis Digital empowers entrepreneurs and small business owners to achieve financial freedom with affordable and easy-to-use marketing and sales automation software, and a…” Source: company website · checked Sep 4, 2026
25	ELM StreetIndirect evidence	Seattle, WA, United StatesHQ checked Sep 4, 2026	201-500	100
	“Elm Street Technology offers a growing portfolio of real estate technology and marketing services with the goal of providing one vendor and one point of contact, fully fused into…” Source: company website · checked Sep 4, 2026

Showing 25 of 2,019 lead nurturing software companies based in the United States

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Lead nurturing software companies based in the United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 105 HQs

5,926Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

1,201

11-50

604

51-200

155

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

31–60

559

61–90

3,113

90–180

2,315

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 software companies, 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 software companies”. 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 software companies, 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, 6,071 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 software companies by metro

Frequently asked

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

RevenueBase identified 2,019 lead nurturing software companies 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?

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

Which city has the most lead nurturing software companies?

New York leads with 105 headquartered companies, followed by San Francisco (71) and Austin (52).

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 6,071 verified decision-maker contacts tracked across these 2,019 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.