Company lists · Data refreshed September 2026
Top 25 B2B sales process outsourcing firms based in the United States
RevenueBase identified 3,350 B2B sales process outsourcing firms headquartered in the United States as of September 2026 and tracks 57,173 professional contacts across them, including 8,068 with verified work emails. New York is the largest hub.
This list covers B2B sales process outsourcing firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest B2B sales process outsourcing firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,772 contacts → | ||||
Strong evidence “Stream Global Services is a premium business process outsource (BPO) service provider specializing in customer relationship management solutions including sales, customer care…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,446 contacts → | ||||
Strong evidence “MarketStar is a global B2B sales outsourcing leader with 38+ years of experience driving predictable revenue growth.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,238 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,237 contacts → | ||||
Indirect evidence “SEBPO transforms operational complexity into a seamless, strategic advantage.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 902 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 776 contacts → | ||||
Indirect evidence “Salelytics is now MarketSource.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 724 contacts → | ||||
Partial evidence “We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 708 contacts → | ||||
Partial evidence “Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 697 contacts → | ||||
Partial evidence “Flexisales, is a global frontrunner in B2B Lead & Demand Generation and Data Services, serving technology companies & agencies worldwide.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 609 contacts → | ||||
Strong evidence “Infinity is an award-winning inside sales agency and consulting firm with 30 years of experience helping B2B companies maximize sales and drive revenue.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 528 contacts → | ||||
Partial evidence “movingDneedle is a Business to Business Sales Lead Generation Company that provides fast and scalable, sales qualified leads through its unique Personalized Email Marketing…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 499 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 482 contacts → | ||||
Strong evidence “InfoAnalytica is a B2B sales acceleration partner for mid-market and enterprise companies.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 478 contacts → | ||||
Strong evidence “About DemandShore Since 2004, we’ve been working hard to deliver value to Sales & Marketing professionals across B2B Technology companies globally.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 455 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 426 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 403 contacts → | ||||
Strong evidence “Global Agility Solutions offers comprehensive onshore, offshore and hybrid Business Process Outsourcing (BPO) services and solutions focused on automating and advancing repeatable…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 397 contacts → | ||||
Indirect evidence “Vendavo helps manufacturers and distributors turn commercial complexity into advantage.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 393 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 380 contacts → | ||||
Strong evidence “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.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 377 contacts → | ||||
Partial evidence “EBQ is an outsourced sales and marketing organization that provides services to help companies scale.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 354 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 349 contacts → | ||||
Strong evidence “FunnL was built on a revolutionary idea: B2B companies don’t need more leads-they need more qualified sales meetings with decision-makers.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 339 contacts → | ||||
Strong evidence “Launch-ready sales teams, experienced leaders, and time-tested processes to help you acquire new customers faster and with less risk than doing it alone.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 329 contacts → | ||||
Indirect evidence “About Eplanet Global Since our inception in 2003, Eplanet Global has been a trailblazer in the tech-driven BPO industry.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: B2B sales process outsourcing firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names B2B sales process outsourcing firms.
- Partial evidence
- Its own public description names part of B2B sales process outsourcing firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name B2B sales process outsourcing firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 3,350 B2B sales process outsourcing firms based in the United States
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B2B sales process outsourcing firms based in the United States at a glance
As of Sep 27, 2026Companies by employee count
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 3,350 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among B2B sales process outsourcing firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “B2B sales process outsourcing firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names B2B sales process outsourcing firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among B2B sales process outsourcing firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 8,068 across the full list. 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.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
B2B sales process outsourcing firms by metro
- B2B sales process outsourcing firms in New York167
- B2B sales process outsourcing firms in Sheridan87
- B2B sales process outsourcing firms in Austin85
- B2B sales process outsourcing firms in Los Angeles75
- B2B sales process outsourcing firms in San Francisco74
- B2B sales process outsourcing firms in Houston70
- B2B sales process outsourcing firms in Miami69
- B2B sales process outsourcing firms in Chicago61
- B2B sales process outsourcing firms in Dallas56
- B2B sales process outsourcing firms in Atlanta52
- B2B sales process outsourcing firms in Denver47
- B2B sales process outsourcing firms in San Diego47
- B2B sales process outsourcing firms in Phoenix33
- B2B sales process outsourcing firms in Las Vegas32
- B2B sales process outsourcing firms in Wilmington32
- B2B sales process outsourcing firms in Seattle30
- B2B sales process outsourcing firms in Charlotte25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names B2B sales process outsourcing firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many B2B sales process outsourcing firms are there based in the United States?
RevenueBase identified 3,350 B2B sales process outsourcing firms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Stream Global Services, headquartered in Eagan, tops this list with the largest team on record.
Which city has the most B2B sales process outsourcing firms?
New York leads with 167 headquartered companies, followed by Sheridan (87) and Austin (85).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 8,068 verified decision-maker contacts tracked across these 3,350 companies.
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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B2B sales process outsourcing firms by geography
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- B2B sales process outsourcing firms based in Bangalore, India
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- B2B sales process outsourcing firms based in Hyderabad, India
- B2B sales process outsourcing firms based in Mumbai, India
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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 Smart Search, 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.
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