Company lists · Data refreshed September 2026

Top 25 Inside sales consultancies worldwide

Name: Inside sales consultancies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 16,352 companies tracked

RevenueBase identified 16,352 inside sales consultancies worldwide as of September 2026 and tracks 94,277 professional contacts across them, including 15,441 with verified work emails. The United States is the largest market and London the largest hub.

This list covers inside sales consultancies worldwide, 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 28, 2026. Country and city lists for inside sales consultancies follow the table.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

16,352Companies

94,277Contacts tracked

15,441Verified emails

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The 25 largest inside sales consultancies worldwide

Ranked by team size

Top 25 of 16,352 inside sales consultancies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to inside sales consultancies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Marketsource INC	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 28, 2026	5,001-10,000	3,063 contacts →
	Partial evidence “MarketSource, an Allegis Group company, is a sales acceleration company focused on delivering better outcomes for many of the world’s most iconic brands.” Source: RevenueBase Database · checked Sep 28, 2026
2	Webhelp Enterprise	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	10001+	1,795 contacts →
	Partial evidence “The Concentrix B2B sales practice is here to design, build and run projects for our clients.” Source: RevenueBase Database · checked Sep 28, 2026
3	ZAZ Vendas	Indirect evidence	Campinas, BrazilHQ checked Sep 28, 2026	501-1,000	796 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
4	Abstrakt Marketing Group	Indirect evidence	St Louis, MO, United StatesHQ checked Sep 28, 2026	501-1,000	724 contacts →
	Indirect evidence “We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Source: RevenueBase Database · checked Sep 28, 2026
5	Infinity	Strong evidence	Cedar Rapids, IA, United StatesHQ checked Sep 28, 2026	501-1,000	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 28, 2026
6	Telenet Marketing Solutions	Indirect evidence	Athens, GA, IndiaHQ checked Sep 28, 2026	201-500	553 contacts →
	Indirect evidence “From initial market awareness to the final stages of a complex B2B buying journey, modern buyers crave authentic interaction.” Source: RevenueBase Database · checked Sep 28, 2026
7	Saleshive	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	455 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
8	The Lead Market	Indirect evidence	Nagpur, IndiaHQ checked Sep 28, 2026	51-200	387 contacts →
	Indirect evidence “TLM empowers businesses to generate revenue through their qualified leads.” Source: RevenueBase Database · checked Sep 28, 2026
9	Cobmax	Partial evidence	Sao Jose Do Rio Preto, BrazilHQ checked Sep 28, 2026	501-1,000	376 contacts →
	Partial evidence “A Cobmax é uma Sales Center com inteligência em vendas, fruto de metodologia própria, testada e aprovada em 11 anos de experiência.” Source: RevenueBase Database · checked Sep 28, 2026
10	Simplus	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 28, 2026	501-1,000	374 contacts →
	Indirect evidence “We will meet clients where they are on their Salesforce journey, accelerating time to value through our advisory-led, industry-focused, and partner-aligned approach to…” Source: RevenueBase Database · checked Sep 28, 2026
11	Miller Heiman Group, A Korn Ferry Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	371 contacts →
	Indirect evidence “Miller Heiman Group is now part of Korn Ferry.” Source: RevenueBase Database · checked Sep 28, 2026
12	Freelan	Indirect evidence	Huixquilucan, MexicoHQ checked Sep 28, 2026	n/a	340 contacts →
	Indirect evidence “En Freelan, creemos que el crecimiento sostenible no es fruto del azar, sino de un sistema bien diseñado.” Source: RevenueBase Database · checked Sep 28, 2026
13	Jumpcrew	Partial evidence	Nashville, TN, United StatesHQ checked Sep 28, 2026	201-500	339 contacts →
	Partial 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 28, 2026
14	Sales Xceleration	Partial evidence	Fishers, IN, United StatesHQ checked Sep 28, 2026	51-200	268 contacts →
	Partial evidence “At Sales Xceleration, we help businesses accelerate revenue growth through our Certified Sales Operating Management System™ and the guidance of our Fractional Sales Leaders.” Source: RevenueBase Database · checked Sep 28, 2026
15	Mercuri International Group	Partial evidence	Stockholm, SwedenHQ checked Sep 28, 2026	501-1,000	263 contacts →
	Partial evidence “Every year Mercuri International empowers companies in over 50 countries to achieve sales excellence.” Source: RevenueBase Database · checked Sep 28, 2026
16	Quarry NOW Marketbridge	Indirect evidence	St. Jacobs, ON, CanadaHQ checked Sep 28, 2026	51-200	248 contacts →
	Indirect evidence “Quarry is now Marketbridge.” Source: RevenueBase Database · checked Sep 28, 2026
17	Rocket Connections	Partial evidence	Detroit, MI, United StatesHQ checked Sep 28, 2026	1,001-5,000	247 contacts →
	Partial evidence “Rocket Connections is a sales and support platform specializing in contact center services.” Source: RevenueBase Database · checked Sep 28, 2026
18	Mercadeo	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	240 contacts →
	Indirect evidence “Mercadeo strategies are embedded in a sound foundation of proven, time tested business fundamentals, a deep understanding of different market dynamics and intimate knowledge of…” Source: RevenueBase Database · checked Sep 28, 2026
19	Corporate Visions	Partial evidence	Mesa, AZ, United StatesHQ checked Sep 28, 2026	51-200	239 contacts →
	Partial evidence “Corporate Visions is the leading provider of evidence-based sales training, messaging, and revenue enablement solutions for B2B companies around the globe.” Source: RevenueBase Database · checked Sep 28, 2026
20	Marketjoy, INC	Partial evidence	Pensacola, FL, United StatesHQ checked Sep 28, 2026	51-200	223 contacts →
	Partial evidence “Founded in 2016 and headquartered in Pensacola, Florida, MarketJoy is a B2B lead generation, appointment generation and sales development partner built to deliver predictable…” Source: RevenueBase Database · checked Sep 28, 2026
21	Virage Conseil	Indirect evidence	56100, FranceHQ checked Sep 28, 2026	201-500	222 contacts →
	Indirect evidence “Spécialiste depuis presque 25 ans dans le développement commercial, Virage Conseil vous accompagne au quotidien pour accroître vos ventes.” Source: RevenueBase Database · checked Sep 28, 2026
22	Squeeze	Partial evidence	Orem, United StatesHQ checked Sep 28, 2026	501-1,000	217 contacts →
	Partial evidence “Squeeze (GoSqueeze.com) is the leader in Sales Experience (SX).” Source: RevenueBase Database · checked Sep 28, 2026
23	Growth ERA	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 28, 2026	51-200	217 contacts →
	Partial evidence “Growth Era (formerly nextsales) is a sales enablement company with a passion to empower the growth of ambitious B2B companies.” Source: RevenueBase Database · checked Sep 28, 2026
24	IGC Partners	Indirect evidence	São Paulo, BrazilHQ checked Sep 28, 2026	201-500	213 contacts →
	Indirect evidence “A igc partners é a assessoria de empresas líder em operações de venda total ou parcial e captação de recursos.” Source: RevenueBase Database · checked Sep 28, 2026
25	Southwestern Consulting	Partial evidence	Nashville, TN, United StatesHQ checked Sep 28, 2026	51-200	212 contacts →
	Partial evidence “At Southwestern Consulting, we elevate the practice and perception of sales.” Source: RevenueBase Database · checked Sep 28, 2026

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: inside sales consultancies. 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 inside sales consultancies.
Partial evidence: Its own public description names part of inside sales consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name inside sales consultancies. 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 16,352 inside sales consultancies worldwide

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Inside sales consultancies worldwide at a glance

As of Sep 28, 2026

16.4%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

12,570

11-50

2,944

51-200

643

201-500

120

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among inside sales consultancies, 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.
Coverage: Every country. Country and city lists for inside sales consultancies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “inside sales consultancies”. 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 inside sales consultancies), 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 inside sales consultancies, and records with no verified work email.
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, 15,441 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 28, 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.

Inside sales consultancies by location

79 lists · largest first

Every Inside sales consultancies 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 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 inside sales consultancies, 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 inside sales consultancies are there worldwide?

RevenueBase identified 16,352 inside sales consultancies worldwide 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?

Marketsource INC, headquartered in Alpharetta, tops this list with the largest team on record.

Which country has the most inside sales consultancies?

The United States leads with 3,839 companies, followed by the United Kingdom (1,219) and Brazil (1,180). Every inside sales consultancies list by country and city is linked on this page.

Which city has the most inside sales consultancies?

London leads with 410 headquartered companies, followed by Sao Paulo (310) and Paris (166).

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 15,441 verified decision-maker contacts tracked across these 16,352 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 28, 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 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.