Company lists · Data refreshed September 2026

Top 25 Outsourced sdr firms worldwide

RevenueBase identified 5,673 company matches for outsourced sdr firms worldwide as of September 2026 and tracks 52,231 professional contacts across them, including 6,919 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for outsourced sdr firms 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 sdr firms 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
5,673Companies
52,231Contacts tracked
6,919Verified emails
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The 25 largest outsourced sdr firms worldwide

Ranked by team size
Top 25 of 5,673 company matches for outsourced sdr firms 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 matchParis, FranceHQ recorded Sep 21, 202610001+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 21, 2026 · View company records in RevenueBase
2Exact matchTysons, VA, United StatesHQ recorded Sep 21, 2026501-1,000825 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 21, 2026 · View company records in RevenueBase
3Exact matchCampinas, BrazilHQ recorded Sep 21, 2026501-1,000796 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 21, 2026 · View company records in RevenueBase
4Exact matchSt Louis, MO, United StatesHQ recorded Sep 21, 2026501-1,000724 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 21, 2026 · View company records in RevenueBase
5Exact 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
6Exact matchAthens, GA, IndiaHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
7Exact 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
8Exact matchSan Jose, CA, United StatesHQ recorded Sep 21, 2026201-500523 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 21, 2026 · View company records in RevenueBase
9Exact 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
10Exact 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
11Exact 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
12Exact 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
13Exact matchAustin, TX, United StatesHQ recorded Sep 21, 2026201-500377 contacts →

Exact match

“EBQ is an outsourced sales and marketing organization that provides services to help companies scale.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchPhiladelphia, United StatesHQ recorded Sep 21, 2026201-500349 contacts →

Exact match

“FunnL was built on a revolutionary idea: B2B companies don’t need more leads-they need more qualified sales meetings with decision-makers.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchChelmsford, MA, United StatesHQ recorded Sep 21, 2026201-500291 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchDetroit, MI, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
17Exact 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
18Exact matchOrem, United StatesHQ recorded Sep 21, 2026501-1,000217 contacts →

Exact match

“Squeeze (GoSqueeze.com) is the leader in Sales Experience (SX).”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchDover, DE, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
20Exact matchPune, IndiaHQ recorded Sep 21, 2026201-500208 contacts →

Exact match

“We are Only B2B – Your reliable growth partner!”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200205 contacts →

Exact match

“EngageTech is the leading sales development partner for complex B2B technology companies operating in multi-stakeholder, enterprise sales environments.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact 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
23Exact matchNorth Charleston, SC, United StatesHQ recorded Sep 21, 2026201-500198 contacts →

Exact match

“Sales Focus Inc.(SFI) pioneered the sales outsourcing industry in 1998.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact 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
25Exact matchNürnberg, GermanyHQ recorded Sep 21, 2026201-500188 contacts →

Exact match

“Als Vertriebspartner von B2B-Unternehmen steigern wir seit über 20 Jahren Umsätze, gewinnen neue Kunden und heben ungenutzte Marktpotenziale.”

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

Showing 25 of 5,673 outsourced sdr firms worldwide

See the full list, filter by size, metro and specialty, and access 6,919 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Outsourced sdr firms worldwide at a glance

As of Sep 21, 2026
13.2%Verified-email coverage
9.2Average contacts per company
1-10Median size (employees)
2.9%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
3,442
11-50
1,646
51-200
448
201-500
98
501-1,000
14
1,001-5,000
11
5,001-10,000
3
10001+
5

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 sdr firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “outsourced sdr firms” 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 6,919 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 sdr firms by location

25 lists · largest first

Every Outsourced sdr firms 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 sdr firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many outsourced sdr firms are there worldwide?

RevenueBase identified 5,673 company matches for outsourced sdr firms 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?

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

Which country has the most outsourced sdr firms?

The United States leads with 1,235 companies, followed by the United Kingdom (485) and India (484). Every outsourced sdr firms list by country and city is linked on this page.

Which city has the most outsourced sdr firms?

London leads with 162 company records, followed by Pune (124) and Paris (77).

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 6,919 professional contacts with verified work emails tracked across these 5,673 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.