Company lists · Data refreshed September 2026

Top 25 Sales process outsourcing firms worldwide

Name: Sales process outsourcing firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 13,097 companies tracked

RevenueBase identified 13,097 company matches for sales process outsourcing firms worldwide as of September 2026 and tracks 197,797 professional contacts across them, including 21,176 with verified work emails. The United States is the largest market and London the largest hub.

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

13,097Companies

197,797Contacts tracked

21,176Verified emails

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The 25 largest sales process outsourcing firms worldwide

Ranked by team size

Top 25 of 13,097 company matches for sales process outsourcing firms 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	Ienergizer	Exact match	Noida, IndiaHQ recorded Sep 29, 2026	10001+	14,745 contacts →
	Exact match “iEnergizer is a leading Business Process Outsourcing provider (“BPO”) of customer management solutions dedicated to delivering performance while actively supporting and advocating…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	V4 Company	Exact match	Campinas, BrazilHQ recorded Sep 29, 2026	1,001-5,000	5,079 contacts →
	Exact match “Somos uma assessoria de marketing focada em construir e otimizar o processo de vendas através da internet conectando pessoas que geram resultados com empresas que buscam vender…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Apex America	Exact match	Córdoba, ArgentinaHQ recorded Sep 29, 2026	10001+	4,377 contacts →
	Exact match “At Apex America, we are a Next Generation BPO and a global strategic partner specialized in elevating customer service standards.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Salesland	Exact match	Madrid, MexicoHQ recorded Sep 29, 2026	10001+	4,245 contacts →
	Exact match “We are Sales Specialists.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Ibex. Pakistan	Exact match	Karachi, PakistanHQ recorded Sep 29, 2026	10001+	4,161 contacts →
	Exact match “ibex.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Armatis	Exact match	Paris, FranceHQ recorded Sep 29, 2026	5,001-10,000	3,545 contacts →
	Exact match “For 40 years, Armatis, European expert in customer relationship and process outsourcing, has been transforming brands' ambitions into tangible and measurable results.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	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
8	Stream Global Services	Exact match	Eagan, MN, United StatesHQ recorded Sep 29, 2026	10001+	2,772 contacts →
	Exact match “Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	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
10	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
11	Alta Resources	Exact match	Neenah, WI, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,046 contacts →
	Exact match “Alta Resources has always worked to be something different.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Allied Global	Exact match	GuatemalaHQ recorded Sep 29, 2026	5,001-10,000	1,979 contacts →
	Exact match “Regardless of your Company’s size (from Start-ups to Fortune 500), business vertical or service requirements, we act as a seamless extension of your team to help you grow, and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	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
14	BDS Connected Solutions, LLC	Exact match	Lake Forest, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,530 contacts →
	Exact match “BDS Connected Solutions offers a complete suite of solutions that blend Advocacy, Assisted Sales, Training, Virtual, Retail, Experiential, Merchandising, Break Fix, Installations…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Full Potential Solutions	Exact match	Waltham, MA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,238 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 29, 2026 · View company records in RevenueBase
16	The Office Gurus	Exact match	St Petersburg, FL, RussiaHQ recorded Sep 29, 2026	1,001-5,000	1,198 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
17	T-Roc	Exact match	Coral Gables, FL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,135 contacts →
	Exact match “The Revenue Optimization Companies (T-ROC) is home to four sales solutions companies that enable clients to fulfill all of their sales performance needs.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Peak Support	Exact match	Cambridge, MA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,036 contacts →
	Exact match “Peak Support: A Ubiquity Company is a business process outsourcing (BPO) company growing dedicated to providing exceptional support to high-growth companies.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Rewardsco	Exact match	Durban, South AfricaHQ recorded Sep 29, 2026	1,001-5,000	917 contacts →
	Exact match “Our People.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Inktel Contact Center Solutions	Exact match	Doral, FL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	902 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
21	Horatio	Exact match	New York, United StatesHQ recorded Sep 29, 2026	1,001-5,000	860 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 29, 2026 · View company records in RevenueBase
22	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
23	Dash BPO	Exact match	United StatesHQ recorded Sep 29, 2026	1,001-5,000	814 contacts →
	Exact match “DASH BPO, LLC is a global leader in delivering best-in-class first party solutions for its strategic partners.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	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
25	CPM International	Exact match	Thame, United KingdomHQ recorded Sep 29, 2026	10001+	777 contacts →
	Exact match “CPM is an international sales outsourcing and customer experience agency.” 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 “sales process outsourcing firms”. 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 13,097 sales process outsourcing firms worldwide

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Sales process outsourcing firms worldwide at a glance

As of Sep 29, 2026

10.7%Verified-email coverage

15.1Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

7,317

11-50

3,783

51-200

1,398

201-500

364

501-1,000

117

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 sales process outsourcing firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “sales process 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. 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 21,176 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.

Sales process outsourcing firms by location

68 lists · largest first

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

How many sales process outsourcing firms are there worldwide?

RevenueBase identified 13,097 company matches for sales process outsourcing 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?

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

Which country has the most sales process outsourcing firms?

The United States leads with 2,587 companies, followed by India (1,136) and the United Kingdom (848). Every sales process outsourcing firms list by country and city is linked on this page.

Which city has the most sales process outsourcing firms?

London leads with 286 company records, followed by Pune (212) and Sao Paulo (149).

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 21,176 professional contacts with verified work emails tracked across these 13,097 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.