Company lists · Data refreshed September 2026

Top 25 Outsourced lead qualification services worldwide

RevenueBase identified 5,906 company matches for outsourced lead qualification services worldwide as of September 2026 and tracks 43,733 professional contacts across them, including 4,460 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for outsourced lead qualification services worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026. Country and city lists for outsourced lead qualification services follow the table.

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 RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
5,906Companies
43,733Contacts tracked
4,460Verified emails
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The 25 largest outsourced lead qualification services worldwide

Ranked by team size
Top 25 of 5,906 company matches for outsourced lead qualification services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMiami, FL, United StatesHQ recorded Sep 21, 2026201-5001,068 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchRedwood City, CA, United StatesHQ recorded Sep 21, 2026n/a708 contacts →

Exact match

“Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchLas Vegas, NV, United StatesHQ recorded Sep 21, 2026201-500697 contacts →

Exact match

“Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchSterling Heights, MI, United StatesHQ recorded Sep 21, 202651-200528 contacts →

Exact match

“movingDneedle is a Business to Business Sales Lead Generation Company that provides fast and scalable, sales qualified leads through its unique Personalized Email Marketing…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchDenver, CO, United StatesHQ recorded Sep 21, 202651-200455 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchBrighton, United KingdomHQ recorded Sep 21, 202651-200440 contacts →

Exact match

“We are an award winning multilingual lead generation and market research service provider for B2B publishing, marketing, events and tech companies.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchHurst, TX, United StatesHQ recorded Sep 21, 202651-200428 contacts →

Exact match

“Alliance is a domestically operated, internationally recognized professional contact center specializing in lead generation and appointment setting.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchNagpur, IndiaHQ recorded Sep 21, 202651-200387 contacts →

Exact match

“TLM empowers businesses to generate revenue through their qualified leads.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchSimi Valley, CA, United StatesHQ recorded Sep 21, 2026201-500380 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchMedellín, ColombiaHQ recorded Sep 21, 202651-200292 contacts →

Exact match

“Un solo sistema corre tus ads, habla con tus leads y te entrega clientes listos para cerrar.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchLos Angeles, TX, United StatesHQ recorded Sep 21, 202651-200289 contacts →

Exact match

“Current Vertical Focus: Real Estate - Lead Generation, Lead Conversion, Lead Qualification, Agent Recruiting Mortgage - Lead Conversion, Lead Qualification Insurance - Lead…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchLehi, UT, United StatesHQ recorded Sep 21, 2026501-1,000256 contacts →

Exact match

“Boomsourcing (A Fusion CX Company) is a call center established in 2007.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchPensacola, FL, United StatesHQ recorded Sep 21, 202651-200223 contacts →

Exact match

“Founded in 2016 and headquartered in Pensacola, Florida, MarketJoy is a B2B lead generation, appointment generation and sales development partner built to deliver predictable…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchBucharest, RomaniaHQ recorded Sep 21, 2026n/a208 contacts →

Exact match

“LEADGURU is a Digital Agency that focuses on Done-For-You Lead Generation services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchIloilo City, PhilippinesHQ recorded Sep 21, 20261,001-5,000205 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Sep 21, 2026201-500194 contacts →

Exact match

“ChannelGrowth provides B2B data acquisition, lead generation, prospecting, and sales teams at scale.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchTroy, MI, United StatesHQ recorded Sep 21, 2026501-1,000190 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchSao Paulo, BrazilHQ recorded Sep 21, 2026n/a187 contacts →

Exact match

“Fundada em 2005, a SM Services é especializada em prospecção de mercado para vendas consultivas, oferecendo ao mercado diversos tipos de serviços geração de oportunidades de…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchCopley, OH, United StatesHQ recorded Sep 21, 202651-200185 contacts →

Exact match

“Concept develops and implements comprehensive B2B lead generation and sales development solutions for companies.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchUnited StatesHQ recorded Sep 21, 2026n/a155 contacts →

Exact match

“At DealForce, we drive sales calls on a pay for performance model with interested, target market prospects.$0 upfront.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchMandaue, PhilippinesHQ recorded Sep 21, 2026201-500148 contacts →

Exact match

“For 15 years, we steadily are providing face to face appointments to keep your sales people busy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchNew York, NY, United StatesHQ recorded Sep 21, 202651-200127 contacts →

Exact match

“Established in 2015, Lead Crafters SalesTech Solutions is a reputable Information Technology Enabled Services organization.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchLehi, UT, United StatesHQ recorded Sep 21, 20261,001-5,000124 contacts →

Exact match

“Boom Demand is an Lead Generation & Customer Acquisition powerhouse that will help you increase revenue and grow your customer base.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchPhoenix, AZ, United StatesHQ recorded Sep 21, 202651-200121 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchBirmingham, United KingdomHQ recorded Sep 21, 202651-200119 contacts →

Exact match

“GCL, with its unique, non-scripted approach to telemarketing and related marketing services, has for over 30 years established an enviable reputation for providing winning lead…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 5,906 outsourced lead qualification services worldwide

See the full list, filter by size, metro and specialty, and access 4,460 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Outsourced lead qualification services worldwide at a glance

As of Sep 21, 2026
10.2%Verified-email coverage
7.4Average contacts per company
1-10Median size (employees)
2.4%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
3,566
11-50
1,686
51-200
499
201-500
112
501-1,000
22
1,001-5,000
12
5,001-10,000
1
10001+
1

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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.
Coverage
Every country. Country and city lists for outsourced lead qualification services are linked below.
What qualifies
Company records worldwide whose business descriptions match “outsourced lead qualification services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 4,460 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Outsourced lead qualification services by location

21 lists · largest first

Every Outsourced lead qualification services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “outsourced lead qualification services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many outsourced lead qualification services are there worldwide?

RevenueBase identified 5,906 company matches for outsourced lead qualification services worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Cience tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most outsourced lead qualification services?

The United States leads with 1,401 companies, followed by India (547) and the United Kingdom (428). Every outsourced lead qualification services list by country and city is linked on this page.

Which city has the most outsourced lead qualification services?

London leads with 143 company records, followed by Pune (129) and Paris (73).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,460 professional contacts with verified work emails tracked across these 5,906 companies; direct dials are available where recorded.

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 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.