Company lists · Data refreshed September 2026

Top 25 Lead qualification software companies based in the United States

Name: Lead qualification 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 28, 2026 1,799 companies tracked

RevenueBase identified 1,799 lead qualification software companies headquartered in the United States as of September 2026 and tracks 32,319 professional contacts across them, including 12,324 with verified work emails. San Francisco is the largest hub.

This list covers lead qualification 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

1,799Companies

32,319Contacts tracked

12,324Verified emails

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

Ranked by team size

Top 25 of 1,799 lead qualification software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to lead qualification software companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Hubspot	Partial evidence	Cambridge, MA, United StatesHQ checked Sep 28, 2026	5,001-10,000	11,077 contacts →
	Partial evidence “HubSpot is a leading agentic customer platform that provides software and support to help businesses grow better.” Source: RevenueBase Database · checked Sep 28, 2026
2	6sense	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,443 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
3	Cience	Strong evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	201-500	1,068 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 28, 2026
4	apollo.io	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	863 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
5	Flexisales INC	Partial evidence	Las Vegas, NV, United StatesHQ checked Sep 28, 2026	201-500	697 contacts →
	Partial evidence “Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
6	Sugarai	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	501-1,000	576 contacts →
	Indirect evidence “SugarAI: the CRM that actually helps sellers sell.” Source: RevenueBase Database · checked Sep 28, 2026
7	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 28, 2026	51-200	528 contacts →
	Partial evidence “movingDneedle is a Business to Business Sales Lead Generation Company that provides fast and scalable, sales qualified leads through its unique Personalized Email Marketing…” Source: RevenueBase Database · checked Sep 28, 2026
8	Callbox INC	Partial evidence	Encino, CA, United StatesHQ checked Sep 28, 2026	201-500	499 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
9	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
10	Calliduscloud	Indirect evidence	Dublin, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	357 contacts →
	Indirect evidence “CallidusCloud is now SAP Sales Cloud, part of the SAP Customer Experience division of SAP.” Source: RevenueBase Database · checked Sep 28, 2026
11	Callrail	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	201-500	332 contacts →
	Partial evidence “CallRail is the lead engagement platform that makes it easy for businesses to attract more leads, convert more customers, and optimize their marketing.” Source: RevenueBase Database · checked Sep 28, 2026
12	Artisan	Indirect evidence	San Francisco, United StatesHQ checked Sep 28, 2026	51-200	218 contacts →
	Indirect evidence “Artisan builds AI employees.” Source: RevenueBase Database · checked Sep 28, 2026
13	Leandata	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 28, 2026	51-200	194 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
14	Concept Services	Partial evidence	Copley, OH, United StatesHQ checked Sep 28, 2026	51-200	185 contacts →
	Partial evidence “Concept develops and implements comprehensive B2B lead generation and sales development solutions for companies.” Source: RevenueBase Database · checked Sep 28, 2026
15	CLOSE	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	51-200	140 contacts →
	Indirect evidence “Close is the sales CRM built for founders, startups, and small businesses that want to grow faster.” Source: RevenueBase Database · checked Sep 28, 2026
16	Pipeliner CRM	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 2026	51-200	132 contacts →
	Indirect evidence “Pipeliner has revolutionized the complexity of CRM with a simple, unique visual interface, a no-code workflow automation engine, and instant, dynamic insights and reporting.” Source: RevenueBase Database · checked Sep 28, 2026
17	CINC	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	201-500	130 contacts →
	Partial evidence “CINC (Commissions, Inc.) is the #1 all-in-one real estate lead generation & conversion CRM platform for teams and top agents.” Source: RevenueBase Database · checked Sep 28, 2026
18	seamless.ai	Partial evidence	Columbus, OH, United StatesHQ checked Sep 28, 2026	201-500	128 contacts →
	Partial evidence “Seamless.ai delivers the world's best sales leads.” Source: RevenueBase Database · checked Sep 28, 2026
19	Boom Demand	Partial evidence	Lehi, UT, United StatesHQ checked Sep 28, 2026	1,001-5,000	124 contacts →
	Partial evidence “Boom Demand is an Lead Generation & Customer Acquisition powerhouse that will help you increase revenue and grow your customer base.” Source: RevenueBase Database · checked Sep 28, 2026
20	Clientify	Indirect evidence	New York, United StatesHQ checked Sep 28, 2026	51-200	118 contacts →
	Indirect evidence “Stop playing house and start closing deals.” Source: RevenueBase Database · checked Sep 28, 2026
21	Myadvice	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 28, 2026	51-200	117 contacts →
	Indirect evidence “MyAdvice offers an AI-powered growth system that reduces cost and effort while driving revenue and producing valuable insights.” Source: RevenueBase Database · checked Sep 28, 2026
22	Databees	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	114 contacts →
	Partial evidence “DataBees empowers sales and marketing teams all around the world by providing high quality, verified lead data.” Source: RevenueBase Database · checked Sep 28, 2026
23	Launch Leads	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 28, 2026	51-200	112 contacts →
	Partial evidence “Why Launch Leads?” Source: RevenueBase Database · checked Sep 28, 2026
24	Boomtown	Strong evidence	Charleston, SC, United StatesHQ checked Sep 28, 2026	201-500	106 contacts →
	Strong evidence “BoomTown is a software platform designed to help real estate professionals generate leads, manage contacts, and run their business better.” Source: RevenueBase Database · checked Sep 28, 2026
25	Leadiq	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	104 contacts →
	Indirect evidence “Build pipeline with confidence.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: lead qualification software companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names lead qualification software companies.
Partial evidence: Its own public description names part of lead qualification software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name lead qualification software companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,799 lead qualification software companies based in the United States

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

As of Sep 28, 2026

38.1%Verified-email coverage

18.0Average contacts per company

1-10Median size (employees)

5.4%Largest-city concentration · San Francisco

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,013

11-50

566

51-200

156

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,799 companies.

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 qualification software companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 qualification software companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names lead qualification software companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among lead qualification 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 its RevenueBase Smart Search 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, 12,324 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 28, 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 qualification software companies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names lead qualification software companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 1,799 lead qualification 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?

Hubspot, headquartered in Cambridge, tops this list with the largest team on record.

Which city has the most lead qualification software companies?

San Francisco leads with 98 headquartered companies, followed by New York (91) and Austin (51).

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 12,324 verified decision-maker contacts tracked across these 1,799 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 28, 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 Smart Search, 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.