Company lists · Data refreshed September 2026

Top 25 Inside sales consulting services based in the United States

Name: Inside sales consulting services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 4,012 companies tracked

RevenueBase identified 4,012 inside sales consulting services headquartered in the United States as of September 2026 and tracks 28,353 professional contacts across them, including 6,262 with verified work emails. New York is the largest hub.

This list covers inside sales consulting services 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 28, 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.

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

4,012Companies

28,353Contacts tracked

6,262Verified emails

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The 25 largest inside sales consulting services based in the United States

Ranked by team size

Top 25 of 4,012 inside sales consulting services based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to inside sales consulting services: 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	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
3	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
4	Richardson Sales Performance	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	201-500	493 contacts →
	Partial evidence “Richardson is a global sales training organization that equips sales teams to win more business in an increasingly cautious and complex environment.” Source: RevenueBase Database · checked Sep 28, 2026
5	VRP Consulting	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	448 contacts →
	Indirect evidence “Achieve your Salesforce® ambitions Do what you do better.” Source: RevenueBase Database · checked Sep 28, 2026
6	Palni INC	Indirect evidence	Schaumburg, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	393 contacts →
	Indirect evidence “We are technocrats constantly solving complex problems and enabling clients to rapidly progress their business.” Source: RevenueBase Database · checked Sep 28, 2026
7	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
8	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
9	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
10	Bridge Partners	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	201-500	247 contacts →
	Partial evidence “Bridge Partners is a people-focused, customer-driven consulting firm that helps organizations transform to drive revenue growth, adapt to change, and create customer value.” Source: RevenueBase Database · checked Sep 28, 2026
11	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
12	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
13	Southwestern Consulting	Strong evidence	Nashville, TN, United StatesHQ checked Sep 28, 2026	51-200	212 contacts →
	Strong evidence “At Southwestern Consulting, we elevate the practice and perception of sales.” Source: RevenueBase Database · checked Sep 28, 2026
14	Redcloud Consulting	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 28, 2026	201-500	188 contacts →
	Partial evidence “RedCloud is a business and technology consulting firm providing local companies with expert-level support for over two decades.” Source: RevenueBase Database · checked Sep 28, 2026
15	Reveneer	Strong evidence	Burlington, MA, United StatesHQ checked Sep 28, 2026	201-500	177 contacts →
	Strong evidence “Reveneer has a proven, precisely engineered process for exceptional inside sales results-and we're passionate about using it to solve our customers' sales challenges.” Source: RevenueBase Database · checked Sep 28, 2026
16	Zaphyre	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 28, 2026	51-200	167 contacts →
	Partial evidence “Zaphyre is a U.S-based Execution Service Partner (ESP) specializing in Sales Lead Generation, outbound pipeline development, AI Signal Engine systems, and embedded growth…” Source: RevenueBase Database · checked Sep 28, 2026
17	Sales Performance International	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 28, 2026	201-500	163 contacts →
	Partial evidence “Sales Performance International is a global sales performance training company focused on creating lasting behavior change in sales teams using our world-class Solution Selling®…” Source: RevenueBase Database · checked Sep 28, 2026
18	Chameleon Group, LLC	Partial evidence	Dover, NH, United StatesHQ checked Sep 28, 2026	n/a	163 contacts →
	Partial evidence “Chameleon Group is a leading provider of outsourced business development and sales services, delivering customizable business-to-business, channel, call center and direct sales…” Source: RevenueBase Database · checked Sep 28, 2026
19	PTP	Partial evidence	Sacramento, CA, United StatesHQ checked Sep 28, 2026	51-200	157 contacts →
	Partial evidence “PTP is a consulting firm wholly focused on helping organizations deliver strategic customer experience solutions that drive revenue.” Source: RevenueBase Database · checked Sep 28, 2026
20	Canidium	Partial evidence	Fort Collins, CO, United StatesHQ checked Sep 28, 2026	51-200	141 contacts →
	Partial evidence “Empowering Business Leaders to Surpass Their Revenue Goals Canidium offers consultative expertise, strategic solutions, and technology to enhance your sales performance.” Source: RevenueBase Database · checked Sep 28, 2026
21	Fast Slow Motion	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 28, 2026	51-200	137 contacts →
	Indirect evidence “Fast Slow Motion helps growing businesses build scalable systems using Salesforce, HubSpot, and AI.” Source: RevenueBase Database · checked Sep 28, 2026
22	Challenger	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	51-200	134 contacts →
	Strong evidence “Challenger, powered by Richardson, transforms how sales organizations engage customers by equipping sellers to lead with insight to reframe how buyers think about their business.” Source: RevenueBase Database · checked Sep 28, 2026
23	Force Management	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 28, 2026	51-200	132 contacts →
	Partial evidence “Force Management develops elite sales teams and tomorrow’s sales leaders.” Source: RevenueBase Database · checked Sep 28, 2026
24	Telaffects	Partial evidence	Lake Mary, FL, United StatesHQ checked Sep 28, 2026	11-50	131 contacts →
	Partial evidence “TelAffects is a professional business to business sales and marketing firm that excels at developing and executing sophisticated sales and sales enablement programs that deliver…” Source: RevenueBase Database · checked Sep 28, 2026
25	Boom Demand	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 28, 2026	1,001-5,000	124 contacts →
	Indirect evidence “Boom Demand is an Lead Generation & Customer Acquisition powerhouse that will help you increase revenue and grow your customer base.” 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 consulting services. 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 consulting services.
Partial evidence: Its own public description names part of inside sales consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name inside sales consulting services. 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 4,012 inside sales consulting services based in the United States

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Inside sales consulting services based in the United States at a glance

As of Sep 28, 2026

22.1%Verified-email coverage

7.1Average contacts per company

1-10Median size (employees)

3.5%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

3,165

11-50

683

51-200

116

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 4,012 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 inside sales consulting services, 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 “inside sales consulting services”. 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 consulting services), 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 consulting services, 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, 6,262 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 consulting services by metro

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 consulting services, 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 consulting services are there based in the United States?

RevenueBase identified 4,012 inside sales consulting services 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?

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

Which city has the most inside sales consulting services?

New York leads with 139 headquartered companies, followed by Chicago (98) and Atlanta (91).

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 6,262 verified decision-maker contacts tracked across these 4,012 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.