Company lists · Data refreshed September 2026

Top 25 B2B sales outsourcing firms based in the United States

RevenueBase identified 4,576 company matches for B2B sales outsourcing firms associated with the United States as of September 2026 and tracks 69,601 professional contacts across them, including 10,071 with verified work emails. New York is the largest hub.

This list covers company matches for B2B sales outsourcing firms associated with the United States, 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 27, 2026.

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 27, 2026 How this list was built
4,576Companies
69,601Contacts tracked
10,071Verified emails
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The 25 largest B2B sales outsourcing firms based in the United States

Ranked by team size
Top 25 of 4,576 company matches for B2B sales outsourcing firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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 matchAlpharetta, GA, United StatesHQ recorded Sep 27, 20265,001-10,0003,063 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 27, 2026 · View company records in RevenueBase
2Exact matchOgden, UT, United StatesHQ recorded Sep 27, 20261,001-5,0002,446 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 27, 2026 · View company records in RevenueBase
3Exact matchWaltham, MA, United StatesHQ recorded Sep 27, 20261,001-5,0001,238 contacts →

Exact match

“Full Potential Solutions (FPS) is a new kind of performance-based outsourcing firm that puts culture and employees first, because we believe that happy, fulfilled teams accomplish…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchChicago, IL, United StatesHQ recorded Sep 27, 2026n/a1,188 contacts →

Exact match

“Credico is the world's leading face-to-face customer acquisition agency, helping our clients attract and retain loyal customers.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchDoral, FL, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
6Exact matchNew York, United StatesHQ recorded Sep 27, 20261,001-5,000860 contacts →

Exact match

“Horatio is a premier, tech-enabled outsourcing partner helping ambitious companies scale customer experience and complex business operations without compromising quality…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchTysons, VA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
8Exact matchNew York, NY, United StatesHQ recorded Sep 27, 2026501-1,000740 contacts →

Exact match

“Data Driven.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchSt. Louis, MO, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
10Exact matchRedwood City, CA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
11Exact matchLas Vegas, NV, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
12Exact matchCedar Rapids, IA, United StatesHQ recorded Sep 27, 2026501-1,000609 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 27, 2026 · View company records in RevenueBase
13Exact matchSterling Heights, MI, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
14Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
15Exact matchEncino, CA, United StatesHQ recorded Sep 27, 2026201-500499 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 27, 2026 · View company records in RevenueBase
16Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 2026201-500482 contacts →

Exact match

“InfoAnalytica is a B2B sales acceleration partner for mid-market and enterprise companies.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 2026501-1,000478 contacts →

Exact match

“About DemandShore Since 2004, we’ve been working hard to deliver value to Sales & Marketing professionals across B2B Technology companies globally.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchDenver, CO, United StatesHQ recorded Sep 27, 202651-200455 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchHurst, TX, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
20Exact matchNewport Beach, CA, United StatesHQ recorded Sep 27, 202651-200426 contacts →

Exact match

“At Smart Circle, our goal is to provide our clients with access to customized face-to- face marketing and sales solutions by connecting our clients with a dynamic network of…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchAustin, TX, United StatesHQ recorded Sep 27, 2026501-1,000403 contacts →

Exact match

“Global Agility Solutions offers comprehensive onshore, offshore and hybrid Business Process Outsourcing (BPO) services and solutions focused on automating and advancing repeatable…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchDenver, CO, United StatesHQ recorded Sep 27, 2026201-500397 contacts →

Exact match

“Vendavo helps manufacturers and distributors turn commercial complexity into advantage.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchFort Worth, TX, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
24Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 2026201-500391 contacts →

Exact match

“aMarketForce is a full-scale B2B Contact Database & Demand Generation services company.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchSimi Valley, CA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase

Showing 25 of 4,576 B2B sales outsourcing firms based in the United States

See the full list, filter by size, metro and specialty, and access 10,071 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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B2B sales outsourcing firms based in the United States at a glance

As of Sep 27, 2026
14.5%Verified-email coverage
15.2Average contacts per company
1-10Median size (employees)
5.5%Largest-city concentration · New York
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
2,297
11-50
1,541
51-200
528
201-500
141
501-1,000
41
1,001-5,000
18
5,001-10,000
5
10001+
3

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 4,576 companies.

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.
What qualifies
Company records associated with the United States whose business descriptions match “B2B sales outsourcing 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 10,071 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 27, 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.

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 “B2B sales outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many B2B sales outsourcing firms are there based in the United States?

RevenueBase identified 4,576 company matches for B2B sales outsourcing firms associated with the United States 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?

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

Which city has the most B2B sales outsourcing firms?

New York leads with 253 company records, followed by Austin (111) and Miami (104).

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 10,071 professional contacts with verified work emails tracked across these 4,576 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 27, 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.