Company lists · Data refreshed September 2026

Top 25 Qualified lead call centers worldwide

RevenueBase identified 7,307 company matches for qualified lead call centers worldwide as of September 2026 and tracks 70,430 professional contacts across them, including 6,540 with verified work emails. The United States is the largest market and Pune the largest hub.

This list covers company matches for qualified lead call centers 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 29, 2026. Country and city lists for qualified lead call centers 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 29, 2026 How this list was built
7,307Companies
70,430Contacts tracked
6,540Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest qualified lead call centers worldwide

Ranked by team size
Top 25 of 7,307 company matches for qualified lead call centers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 matchSt Petersburg, FL, RussiaHQ recorded Sep 29, 20261,001-5,0001,198 contacts →

Exact match

“The Office Gurus (TOG) is a global call center and business process outsource provider of customer care, telemarketing, lead generation, appointment setting, order entry, accounts…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchDoral, FL, United StatesHQ recorded Sep 29, 20261,001-5,000902 contacts →

Exact match

“Our Company Inktel is a leading business process outsourcer that specializes in creating personalized call center solutions which enable our clients to increase market share…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchHorsham, PA, United StatesHQ recorded Sep 29, 2026501-1,000883 contacts →

Exact match

“If you are interested in growing your business or increasing efficiency, AnswerNet has the expertise, technology, and people to help you take your company to new heights!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchRedwood City, CA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
5Exact matchLas Vegas, NV, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
6Exact matchJaipur, IndiaHQ recorded Sep 29, 2026501-1,000649 contacts →

Exact match

“We at Girnar Care work towards customer satisfaction and it is also a center of customer excellence.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchAthens, GA, IndiaHQ recorded Sep 29, 2026201-500553 contacts →

Exact match

“From initial market awareness to the final stages of a complex B2B buying journey, modern buyers crave authentic interaction.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchSterling Heights, MI, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
9Exact matchDenver, CO, United StatesHQ recorded Sep 29, 202651-200455 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchCairo, EgyptHQ recorded Sep 29, 20261,001-5,000447 contacts →

Exact match

“Proper Business solutions is offering a comprehensive suite of customer care call center services, outbound and lead generation, back-office and data processing solutions to…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchHurst, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
12Exact matchFort Worth, TX, United StatesHQ recorded Sep 29, 2026501-1,000393 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchNagpur, IndiaHQ recorded Sep 29, 202651-200387 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchSimi Valley, CA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
15Exact matchBloomington, MN, United StatesHQ recorded Sep 29, 20261,001-5,000354 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchIndiaHQ recorded Sep 29, 2026201-500339 contacts →

Exact match

“Inventive SMi was founded in 2008 with the goal of providing enterprise-grade communications solutions to businesses of all sizes.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchChelmsford, MA, United StatesHQ recorded Sep 29, 2026201-500291 contacts →

Exact match

“The market knows us as the leader in appointment setting.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchLos Angeles, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
19Exact matchLehi, UT, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
20Exact matchDetroit, MI, United StatesHQ recorded Sep 29, 20261,001-5,000247 contacts →

Exact match

“Rocket Connections is a sales and support platform specializing in contact center services.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchBrighton, United KingdomHQ recorded Sep 29, 2026201-500243 contacts →

Exact match

“The Telemarketing Company is one of the UK's most trusted telemarketing agencies, delivering flexible, high-quality voice services, including pre and post sales research…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchJerusalem, IsraelHQ recorded Sep 29, 2026n/a230 contacts →

Exact match

“GROW is a full-service marketing agency passionate about helping B2B companies achieve their goals.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchPensacola, FL, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
24Exact matchGreensboro, NC, United StatesHQ recorded Sep 29, 2026201-500216 contacts →

Exact match

“Schedule your FREE Consultation here: http://bit.ly/2gUckQb Anomaly Squared is a contact center services provider.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchDover, DE, United StatesHQ recorded Sep 29, 2026201-500209 contacts →

Exact match

“Belkins is the #1 ranked appointment-setting agency in the USA for 5 years in a row, driving results for businesses in 50+ industries across the globe.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 7,307 qualified lead call centers worldwide

See the full list, filter by size, metro and specialty, and access 6,540 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Qualified lead call centers worldwide at a glance

As of Sep 29, 2026
9.3%Verified-email coverage
9.6Average contacts per company
1-10Median size (employees)
2.4%Largest-city concentration · Pune
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
3,665
11-50
2,371
51-200
925
201-500
247
501-1,000
55
1,001-5,000
30
5,001-10,000
2
10001+
2

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 qualified lead call centers are linked below.
What qualifies
Company records worldwide whose business descriptions match “qualified lead call centers” 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 6,540 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 29, 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.

Qualified lead call centers by location

34 lists · largest first

Every Qualified lead call centers 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 “qualified lead call centers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many qualified lead call centers are there worldwide?

RevenueBase identified 7,307 company matches for qualified lead call centers 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?

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

Which country has the most qualified lead call centers?

The United States leads with 1,708 companies, followed by India (662) and the United Kingdom (576). Every qualified lead call centers list by country and city is linked on this page.

Which city has the most qualified lead call centers?

Pune leads with 175 company records, followed by London (154) and Rawalpindi (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 6,540 professional contacts with verified work emails tracked across these 7,307 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 29, 2026.

Ready to reach these companies? Verified emails and direct dials for all 7,307 qualified lead call centers worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.