Company lists · Data refreshed September 2026

Top 25 Sdr outsourcing services worldwide

Name: Sdr outsourcing services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 11,622 companies tracked

RevenueBase identified 11,622 company matches for sdr outsourcing services worldwide as of September 2026 and tracks 129,204 professional contacts across them, including 14,408 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for sdr outsourcing 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 29, 2026. Country and city lists for sdr outsourcing 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 29, 2026 How this list was built

11,622Companies

129,204Contacts tracked

14,408Verified emails

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The 25 largest sdr outsourcing services worldwide

Ranked by team size

Top 25 of 11,622 company matches for sdr outsourcing services 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Liderança Serviços	Exact match	São José, BrazilHQ recorded Sep 29, 2026	10001+	4,504 contacts →
	Exact match “Atuamos nos principais setores de terceirização, e somos pioneiros na implantação de contratos à distância.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	Marketsource INC	Exact match	Alpharetta, GA, United StatesHQ recorded Sep 29, 2026	5,001-10,000	3,063 contacts →
	Exact match “MarketSource, an Allegis Group company, is a sales acceleration company focused on delivering better outcomes for many of the world’s most iconic brands.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Marketstar	Exact match	Ogden, UT, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,446 contacts →
	Exact match “MarketStar is a global B2B sales outsourcing leader with 38+ years of experience driving predictable revenue growth.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Denave	Exact match	Noida, IndiaHQ recorded Sep 29, 2026	5,001-10,000	2,270 contacts →
	Exact match “We are revenue AI-X-lerators.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Webhelp Enterprise	Exact match	Paris, FranceHQ recorded Sep 29, 2026	10001+	1,795 contacts →
	Exact match “The Concentrix B2B sales practice is here to design, build and run projects for our clients.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Cience	Exact match	Miami, FL, United StatesHQ recorded Sep 29, 2026	201-500	1,068 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 29, 2026 · View company records in RevenueBase
7	Inelcom, Ingeniería Electrónica Comercial	Exact match	Pozuelo De Alarcón, SpainHQ recorded Sep 29, 2026	1,001-5,000	1,007 contacts →
	Exact match “Specialized services in order to provide to other companies outsourcing for activities, improving its performance and cost.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Servestsa	Exact match	Caracas, VenezuelaHQ recorded Sep 29, 2026	n/a	865 contacts →
	Exact match “Statistics first” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Memoryblue	Exact match	Tysons, VA, United StatesHQ recorded Sep 29, 2026	501-1,000	825 contacts →
	Exact match “memoryBlue is the go-to partner for revenue leaders in B2B Tech looking to grow their pipeline engine.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Sourcefit	Exact match	Quezon City, PhilippinesHQ recorded Sep 29, 2026	1,001-5,000	813 contacts →
	Exact match “Sourcefit is focused on providing custom offshore solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	ZAZ Vendas	Exact match	Campinas, BrazilHQ recorded Sep 29, 2026	501-1,000	796 contacts →
	Exact match “Em um mercado cada vez mais competitivo, onde a eficiência em vendas massificadas e externas é um desafio constante, a ZAZ Vendas surge como a resposta definitiva.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Abstrakt Marketing Group	Exact match	St Louis, MO, United StatesHQ recorded Sep 29, 2026	501-1,000	724 contacts →
	Exact match “We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Salebuild	Exact match	Redwood City, CA, United StatesHQ recorded Sep 29, 2026	n/a	708 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
14	Flexisales INC	Exact match	Las Vegas, NV, United StatesHQ recorded Sep 29, 2026	201-500	697 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
15	Girnar Care	Exact match	Jaipur, IndiaHQ recorded Sep 29, 2026	501-1,000	649 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
16	Infinity	Exact match	Cedar Rapids, IA, United StatesHQ recorded Sep 29, 2026	501-1,000	609 contacts →
	Exact match “Infinity is an award-winning inside sales agency and consulting firm with 30 years of experience helping B2B companies maximize sales and drive revenue.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Telenet Marketing Solutions	Exact match	Athens, GA, IndiaHQ recorded Sep 29, 2026	201-500	553 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
18	Movingdneedle Pvt. LTD	Exact match	Sterling Heights, MI, United StatesHQ recorded Sep 29, 2026	51-200	528 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
19	The Pipeline Group	Exact match	San Jose, CA, United StatesHQ recorded Sep 29, 2026	201-500	523 contacts →
	Exact match “The Pipeline Group helps B2B tech companies scale pipeline fast through our SDR-as-a-Service model.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Shore360 INC	Exact match	Clark, PhilippinesHQ recorded Sep 29, 2026	1,001-5,000	517 contacts →
	Exact match “At Shore360, we do offshoring differently.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Callbox INC	Exact match	Encino, CA, United StatesHQ recorded Sep 29, 2026	201-500	499 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Infoanalytica, INC	Exact match	San Jose, CA, United StatesHQ recorded Sep 29, 2026	201-500	482 contacts →
	Exact match “InfoAnalytica is a B2B sales acceleration partner for mid-market and enterprise companies.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Saleshive	Exact match	Denver, CO, United StatesHQ recorded Sep 29, 2026	51-200	455 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Alliance Pdms	Exact match	Hurst, TX, United StatesHQ recorded Sep 29, 2026	51-200	428 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
25	The Lead Market	Exact match	Nagpur, IndiaHQ recorded Sep 29, 2026	51-200	387 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

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “sdr outsourcing services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 11,622 sdr outsourcing services worldwide

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Sdr outsourcing services worldwide at a glance

As of Sep 29, 2026

11.2%Verified-email coverage

11.1Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

6,684

11-50

3,474

51-200

1,082

201-500

244

501-1,000

1,001-5,000

5,001-10,000

10001+

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 sdr outsourcing services are linked below.
What qualifies: Company records worldwide whose business descriptions match “sdr outsourcing 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 14,408 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.

Sdr outsourcing services by location

60 lists · largest first

Every Sdr outsourcing 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 “sdr outsourcing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sdr outsourcing services are there worldwide?

RevenueBase identified 11,622 company matches for sdr outsourcing 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?

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

Which country has the most sdr outsourcing services?

The United States leads with 2,423 companies, followed by India (1,165) and the United Kingdom (893). Every sdr outsourcing services list by country and city is linked on this page.

Which city has the most sdr outsourcing services?

London leads with 320 company records, followed by Pune (229) and New York (126).

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 14,408 professional contacts with verified work emails tracked across these 11,622 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.

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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.