Company lists · Data refreshed September 2026

Top 25 Outsourced lead qualification services based in the United States

Name: Outsourced lead qualification services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 1,401 companies tracked

RevenueBase identified 1,401 outsourced lead qualification services headquartered in the United States as of September 2026 and tracks 15,705 professional contacts across them, including 1,702 with verified work emails. New York is the largest hub.

This list covers outsourced lead qualification services 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 21, 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 21, 2026 86% judged on-target in blind review

1,401Companies

15,705Contacts tracked

1,702Verified emails

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The 25 largest outsourced lead qualification services based in the United States

Ranked by team size

Top 25 of 1,401 outsourced lead qualification services based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to outsourced lead qualification services: 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	Cience	Partial evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	201-500	1,068 contacts →
	Partial 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 21, 2026
2	Salebuild	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 21, 2026	n/a	708 contacts →
	Indirect evidence “Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…” Source: RevenueBase Database · checked Sep 21, 2026
3	Flexisales INC	Partial evidence	Las Vegas, NV, United StatesHQ checked Sep 21, 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 21, 2026
4	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 21, 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 21, 2026
5	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 21, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
6	Alliance Pdms	Partial evidence	Hurst, TX, United StatesHQ checked Sep 21, 2026	51-200	428 contacts →
	Partial evidence “Alliance is a domestically operated, internationally recognized professional contact center specializing in lead generation and appointment setting.” Source: RevenueBase Database · checked Sep 21, 2026
7	Beyond Codes INC	Partial evidence	Simi Valley, CA, United StatesHQ checked Sep 21, 2026	201-500	380 contacts →
	Partial evidence “Beyond Codes is a global B2B lead generation and appointment-setting agency trusted by some of the world's leading technology companies to build enterprise sales pipeline.” Source: RevenueBase Database · checked Sep 21, 2026
8	Calltend INC	Strong evidence	Los Angeles, TX, United StatesHQ checked Sep 21, 2026	51-200	289 contacts →
	Strong evidence “Current Vertical Focus: Real Estate - Lead Generation, Lead Conversion, Lead Qualification, Agent Recruiting Mortgage - Lead Conversion, Lead Qualification Insurance - Lead…” Source: RevenueBase Database · checked Sep 21, 2026
9	Boomsourcing	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 21, 2026	501-1,000	256 contacts →
	Indirect evidence “Boomsourcing (A Fusion CX Company) is a call center established in 2007.” Source: RevenueBase Database · checked Sep 21, 2026
10	Marketjoy, INC	Partial evidence	Pensacola, FL, United StatesHQ checked Sep 21, 2026	51-200	223 contacts →
	Partial evidence “Founded in 2016 and headquartered in Pensacola, Florida, MarketJoy is a B2B lead generation, appointment generation and sales development partner built to deliver predictable…” Source: RevenueBase Database · checked Sep 21, 2026
11	Channelgrowth	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	194 contacts →
	Partial evidence “ChannelGrowth provides B2B data acquisition, lead generation, prospecting, and sales teams at scale.” Source: RevenueBase Database · checked Sep 21, 2026
12	Dynamic BDC	Partial evidence	Troy, MI, United StatesHQ checked Sep 21, 2026	501-1,000	190 contacts →
	Partial evidence “Dynamic Marketing Services was created to cost effectively address the needs of Dealers who want to professionally handle their internet leads as well as their outbound sales and…” Source: RevenueBase Database · checked Sep 21, 2026
13	Concept Services	Partial evidence	Copley, OH, United StatesHQ checked Sep 21, 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 21, 2026
14	The Leadcrafters	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	127 contacts →
	Partial evidence “Established in 2015, Lead Crafters SalesTech Solutions is a reputable Information Technology Enabled Services organization.” Source: RevenueBase Database · checked Sep 21, 2026
15	Boom Demand	Partial evidence	Lehi, UT, United StatesHQ checked Sep 21, 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 21, 2026
16	NEXA	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 21, 2026	51-200	121 contacts →
	Strong evidence “Nexa Receptionists helps businesses convert and qualify more leads through 24/7/365 call answering, inbound and outbound sales, lead qualification, intake, live chat, and text…” Source: RevenueBase Database · checked Sep 21, 2026
17	Salesroads	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 21, 2026	51-200	114 contacts →
	Strong evidence “SalesRoads is an award-winning B2B sales outsourcing firm providing appointment setting and lead generation services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Databees	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
19	Launch Leads	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 21, 2026	51-200	112 contacts →
	Partial evidence “Why Launch Leads?” Source: RevenueBase Database · checked Sep 21, 2026
20	Green Leads, LLC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	100 contacts →
	Partial evidence “Green Leads provides Pipeline Generation services to the Tech & SaaS industry, globally.” Source: RevenueBase Database · checked Sep 21, 2026
21	North State Consulting LLC	Indirect evidence	Wilson, NC, United StatesHQ checked Sep 21, 2026	11-50	98 contacts →
	Indirect evidence “North State Consulting is more than a business.” Source: RevenueBase Database · checked Sep 21, 2026
22	Pipeful	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	98 contacts →
	Indirect evidence “Start closing deals with the help of our SDRs and extensive business data.” Source: RevenueBase Database · checked Sep 21, 2026
23	3tec Solutions	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	51-200	92 contacts →
	Indirect evidence “At 3Tec Solutions, we are always by our client's side while they go from strength to strength in achieving their goals.” Source: RevenueBase Database · checked Sep 21, 2026
24	Clientcurve	Partial evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	51-200	83 contacts →
	Partial evidence “ClientCurve is a leading B2B growth partner specializing in Lead Generation, AI-Powered SDR Services, and Performance-Driven Digital Marketing.” Source: RevenueBase Database · checked Sep 21, 2026
25	RAY Advertising	Partial evidence	Redding, CA, United StatesHQ checked Sep 21, 2026	51-200	77 contacts →
	Partial evidence “Ray Advertising is a performance-driven lead-generation firm delivering high-intent inbound calls and leads through advanced media buying and data-driven customer acquisition.” Source: RevenueBase Database · checked Sep 21, 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: outsourced lead qualification services. 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 outsourced lead qualification services.
Partial evidence: Its own public description names part of outsourced lead qualification services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsourced lead qualification services. 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 1,401 outsourced lead qualification services based in the United States

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Outsourced lead qualification services based in the United States at a glance

As of Sep 21, 2026

10.8%Verified-email coverage

11.2Average contacts per company

1-10Median size (employees)

4.5%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

713

11-50

454

51-200

173

201-500

501-1,000

1,001-5,000

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 1,401 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 outsourced lead qualification services, 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 “outsourced lead qualification services”. 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 outsourced lead qualification services), 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 outsourced lead qualification services, 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, 1,702 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 21, 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.

Outsourced lead qualification services by metro

Outsourced lead qualification services in New York63
Outsourced lead qualification services in Sheridan52
Outsourced lead qualification services in Los Angeles48
Outsourced lead qualification services in San Francisco44
Outsourced lead qualification services in Miami41
Outsourced lead qualification services in Austin31
Outsourced lead qualification services in San Diego30

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 outsourced lead qualification services, 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 outsourced lead qualification services are there based in the United States?

RevenueBase identified 1,401 outsourced lead qualification services 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?

Cience, headquartered in Miami, tops this list with the largest team on record.

Which city has the most outsourced lead qualification services?

New York leads with 63 headquartered companies, followed by Sheridan (52) and Los Angeles (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 1,702 verified decision-maker contacts tracked across these 1,401 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 21, 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.