Company lists · Data refreshed September 2026

Top 25 Lead qualification call centers based in the United States

Name: Lead qualification call centers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 1,421 companies tracked

RevenueBase identified 1,421 lead qualification call centers headquartered in the United States as of September 2026 and tracks 19,303 professional contacts across them, including 1,963 with verified work emails. New York is the largest hub.

This list covers lead qualification call centers 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 15, 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 15, 2026 86% judged on-target in blind review

1,421Companies

19,303Contacts tracked

1,963Verified emails

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The 25 largest lead qualification call centers based in the United States

Ranked by team size

Top 25 of 1,421 lead qualification call centers based in the United States, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to lead qualification call centers: 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 15, 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 15, 2026
2	Salebuild	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 15, 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 15, 2026
3	Flexisales INC	Partial evidence	Las Vegas, NV, United StatesHQ checked Sep 15, 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 15, 2026
4	Movingdneedle Pvt. LTD	Partial evidence	Sterling Heights, MI, United StatesHQ checked Sep 15, 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 15, 2026
5	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 15, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 15, 2026
6	Alliance Pdms	Strong evidence	Hurst, TX, United StatesHQ checked Sep 15, 2026	51-200	428 contacts →
	Strong evidence “Alliance is a domestically operated, internationally recognized professional contact center specializing in lead generation and appointment setting.” Source: RevenueBase Database · checked Sep 15, 2026
7	Touchstone Communications	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 15, 2026	501-1,000	393 contacts →
	Indirect evidence “Touchstone Communications was built in 2002 on the philosophy of hiring educated, motivated talent and then providing them with the best training and management to achieve our…” Source: RevenueBase Database · checked Sep 15, 2026
8	Beyond Codes INC	Partial evidence	Simi Valley, CA, United StatesHQ checked Sep 15, 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 15, 2026
9	The Connection Contact Center	Partial evidence	Bloomington, MN, United StatesHQ checked Sep 15, 2026	1,001-5,000	354 contacts →
	Partial evidence “For over 35 years, The Connection has made a name for ourselves becoming one of the top industry partners to Fortune 500 companies looking to outsource their contact center…” Source: RevenueBase Database · checked Sep 15, 2026
10	Calltend INC	Strong evidence	Los Angeles, TX, United StatesHQ checked Sep 15, 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 15, 2026
11	Boomsourcing	Strong evidence	Lehi, UT, United StatesHQ checked Sep 15, 2026	501-1,000	256 contacts →
	Strong evidence “Boomsourcing (A Fusion CX Company) is a call center established in 2007.” Source: RevenueBase Database · checked Sep 15, 2026
12	Rocket Connections	Partial evidence	Detroit, MI, United StatesHQ checked Sep 15, 2026	1,001-5,000	247 contacts →
	Partial evidence “Rocket Connections is a sales and support platform specializing in contact center services.” Source: RevenueBase Database · checked Sep 15, 2026
13	Marketjoy, INC	Partial evidence	Pensacola, FL, United StatesHQ checked Sep 15, 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 15, 2026
14	Squeeze	Indirect evidence	Orem, United StatesHQ checked Sep 15, 2026	501-1,000	217 contacts →
	Indirect evidence “Squeeze (GoSqueeze.com) is the leader in Sales Experience (SX).” Source: RevenueBase Database · checked Sep 15, 2026
15	Anomaly Squared	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 15, 2026	201-500	216 contacts →
	Partial evidence “Schedule your FREE Consultation here: http://bit.ly/2gUckQb Anomaly Squared is a contact center services provider.” Source: RevenueBase Database · checked Sep 15, 2026
16	Quantum 3 Media	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 15, 2026	51-200	204 contacts →
	Strong evidence “Quantum 3 Media is one of the fastest growing organizations within the customer acquisition, lead generation/Pay per call within all verticals of insurance and education, contact…” Source: RevenueBase Database · checked Sep 15, 2026
17	Signia	Indirect evidence	Westminster, CO, United StatesHQ checked Sep 15, 2026	201-500	181 contacts →
	Indirect evidence “Signia aims to provide marketing services to targeted business environments in the US.” Source: RevenueBase Database · checked Sep 15, 2026
18	Gold Mountain Communications	Strong evidence	Springfield, MO, United StatesHQ checked Sep 15, 2026	201-500	180 contacts →
	Strong evidence “Gold Mountain Communications is a US-based live operator inbound/outbound call center and service agency helping leading national corporations outsource their customer service and…” Source: RevenueBase Database · checked Sep 15, 2026
19	Callsexperts	Strong evidence	New York, United StatesHQ checked Sep 15, 2026	501-1,000	173 contacts →
	Strong evidence “Calls Experts is a global contact center solution provider.” Source: RevenueBase Database · checked Sep 15, 2026
20	Callsource	Partial evidence	Westlake Village, CA, United StatesHQ checked Sep 15, 2026	51-200	163 contacts →
	Partial evidence “CallSource, the originator of call tracking systems and services, ignited the industry with its founding in 1991.” Source: RevenueBase Database · checked Sep 15, 2026
21	Balboa Digital	Strong evidence	Claremont, CA, United StatesHQ checked Sep 15, 2026	201-500	137 contacts →
	Strong evidence “Balboa Digital Provides Trusted, Compliant, Effective Call Center Services Get to know Balboa Digital - Our experience, expertise, and innovative call technology, set us apart.” Source: RevenueBase Database · checked Sep 15, 2026
22	Boom Demand	Partial evidence	Lehi, UT, United StatesHQ checked Sep 15, 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 15, 2026
23	First Connect Digital	Indirect evidence	Newark, NJ, United StatesHQ checked Sep 15, 2026	51-200	123 contacts →
	Indirect evidence “First Connect Digital (FCD) is a collective of seasoned marketing and business professionals with decades of leadership experience with leading global media companies and brands.” Source: RevenueBase Database · checked Sep 15, 2026
24	Launch Leads	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 15, 2026	51-200	112 contacts →
	Partial evidence “Why Launch Leads?” Source: RevenueBase Database · checked Sep 15, 2026
25	Callcore Media, INC	Indirect evidence	Daytona Beach, FL, United StatesHQ checked Sep 15, 2026	51-200	98 contacts →
	Indirect evidence “Since its inception in 2012, CallCore Media Inc.” Source: RevenueBase Database · checked Sep 15, 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 call centers. 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 call centers.
Partial evidence: Its own public description names part of lead qualification call centers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name lead qualification call centers. 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 1,421 lead qualification call centers based in the United States

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Lead qualification call centers based in the United States at a glance

As of Sep 15, 2026

10.2%Verified-email coverage

13.6Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · New York

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

616

11-50

487

51-200

216

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 1,421 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 call centers, 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 call centers”. 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 call centers), 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 call centers, 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, 1,963 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 15, 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 call centers by metro

Lead qualification call centers in New York54
Lead qualification call centers in Los Angeles45
Lead qualification call centers in Miami45
Lead qualification call centers in Sheridan42
Lead qualification call centers in Las Vegas30
Lead qualification call centers in San Francisco28
Lead qualification call centers in Austin26
Lead qualification call centers in San Diego26

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 call centers, 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 call centers are there based in the United States?

RevenueBase identified 1,421 lead qualification call centers 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 lead qualification call centers?

New York leads with 54 headquartered companies, followed by Los Angeles (45) and Miami (45).

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 1,963 verified decision-maker contacts tracked across these 1,421 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 15, 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.