Company lists · Data refreshed September 2026

Top 25 Sales engagement platforms based in the United States

RevenueBase identified 1,067 sales engagement platforms headquartered in the United States as of September 2026 and tracks 39,730 professional contacts across them, including 18,065 with verified work emails. San Francisco is the largest hub.

This list covers sales engagement platforms 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 14, 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 14, 2026 86% judged on-target in blind review
1,067Companies
39,730Contacts tracked
18,065Verified emails
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The 25 largest sales engagement platforms based in the United States

Ranked by team size
Top 25 of 1,067 sales engagement platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to sales engagement platforms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceCambridge, MA, United StatesHQ checked Sep 14, 20265,001-10,00011,077 contacts →

Partial evidence

“HubSpot is a leading agentic customer platform that provides software and support to help businesses grow better.”

Source: RevenueBase Database · checked Sep 14, 2026
2Indirect evidenceBoston, MA, United StatesHQ checked Sep 14, 20261,001-5,0002,789 contacts →

Indirect evidence

“Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.”

Source: RevenueBase Database · checked Sep 14, 2026
3Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 14, 20261,001-5,0001,443 contacts →

Indirect evidence

“6sense is on a mission to revolutionize the way B2B organizations create revenue by predicting customers most likely to buy and recommending the best course of action to engage…”

Source: RevenueBase Database · checked Sep 14, 2026
4Indirect evidenceSan Diego, CA, United StatesHQ checked Sep 14, 20261,001-5,0001,256 contacts →

Indirect evidence

“Seismic is the global leader in enablement, helping organizations engage customers, enable teams, and ignite revenue growth.”

Source: RevenueBase Database · checked Sep 14, 2026
5Indirect evidenceMiami, FL, United StatesHQ checked Sep 14, 2026201-5001,068 contacts →

Indirect evidence

“CIENCE Technologies, Inc, founded in 2015 and headquartered in Denver, CO, is a pioneering global company in lead generation software and services, committed to transforming the…”

Source: RevenueBase Database · checked Sep 14, 2026
6Partial evidenceNew York, NY, United StatesHQ checked Sep 14, 2026501-1,000970 contacts →

Partial evidence

“Founded in 2010, Pipedrive is an easy and effective sales CRM that drives small business growth.”

Source: RevenueBase Database · checked Sep 14, 2026
7Indirect evidenceSeattle, WA, United StatesHQ checked Sep 14, 2026501-1,000936 contacts →

Indirect evidence

“Highspot helps companies around the world turn go-to-market strategy into consistent, revenue-driving execution.”

Source: RevenueBase Database · checked Sep 14, 2026
8Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 14, 2026501-1,000863 contacts →

Strong evidence

“Apollo.io is the AI-powered end-to-end go-to-market platform that empowers sales, marketing, and revenue teams to find prospects, engage customers, and close deals with…”

Source: RevenueBase Database · checked Sep 14, 2026
9Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 14, 2026501-1,000622 contacts →

Indirect evidence

“ON24, a Cvent company, is on a mission to help businesses bring their go-to-market strategy into the AI era and drive cost-effective revenue growth.”

Source: RevenueBase Database · checked Sep 14, 2026
10Indirect evidenceDenver, CO, United StatesHQ checked Sep 14, 2026501-1,000576 contacts →

Indirect evidence

“SugarAI: the CRM that actually helps sellers sell.”

Source: RevenueBase Database · checked Sep 14, 2026
11Strong evidenceSan Jose, CA, United StatesHQ checked Sep 14, 20261,001-5,000572 contacts →

Strong evidence

“Adobe Marketo Engage offers the leading Engagement Platform that empowers marketers to build brand value, grow revenue, and prove impact.”

Source: RevenueBase Database · checked Sep 14, 2026
12Partial evidenceSan Jose, CA, United StatesHQ checked Sep 14, 2026201-500482 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 14, 2026
13Indirect evidenceSunnyvale, CA, United StatesHQ checked Sep 14, 202651-200480 contacts →

Indirect evidence

“At SMARTe, we understand the challenges faced by revenue-generating teams.”

Source: RevenueBase Database · checked Sep 14, 2026
14Partial evidenceWest Hollywood, CA, United StatesHQ checked Sep 14, 2026201-500368 contacts →

Partial evidence

“Invoca is the revenue execution and platform leader that helps marketing, commerce, and contact center teams turn every conversation into revenue.”

Source: RevenueBase Database · checked Sep 14, 2026
15Strong evidenceAtlanta, GA, United StatesHQ checked Sep 14, 2026201-500332 contacts →

Strong evidence

“CallRail is the lead engagement platform that makes it easy for businesses to attract more leads, convert more customers, and optimize their marketing.”

Source: RevenueBase Database · checked Sep 14, 2026
16Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 14, 202651-200318 contacts →

Indirect evidence

“Nooks is the Agent Workspace for intelligent outbound.”

Source: RevenueBase Database · checked Sep 14, 2026
17Strong evidenceHenderson, NV, United StatesHQ checked Sep 14, 2026n/a260 contacts →

Strong evidence

“Best-in-class sales & marketing automation platform and marketplace for digital business owners and online marketers”

Source: RevenueBase Database · checked Sep 14, 2026
18Indirect evidenceWaltham, MA, United StatesHQ checked Sep 14, 2026201-500249 contacts →

Indirect evidence

“Bigtincan is now officially part of Showpad.”

Source: RevenueBase Database · checked Sep 14, 2026
19Strong evidenceLos Angeles, CA, United StatesHQ checked Sep 14, 2026201-500241 contacts →

Strong evidence

“Convoso is an AI-powered contact center platform built for revenue teams and customer engagement organizations expanding into outbound growth.”

Source: RevenueBase Database · checked Sep 14, 2026
20Partial evidenceChicago, IL, United StatesHQ checked Sep 14, 2026201-500232 contacts →

Partial evidence

“Tacton is a leading SaaS company redefining buyer engagement for manufacturers of complex products.”

Source: RevenueBase Database · checked Sep 14, 2026
21Indirect evidenceSan Francisco, United StatesHQ checked Sep 14, 202651-200218 contacts →

Indirect evidence

“Artisan builds AI employees.”

Source: RevenueBase Database · checked Sep 14, 2026
22Partial evidenceSheridan, WY, United StatesHQ checked Sep 14, 202651-200215 contacts →

Partial evidence

“All-in-one outreach platform for business growth.”

Source: RevenueBase Database · checked Sep 14, 2026
23Indirect evidenceNew York, NY, United StatesHQ checked Sep 14, 202651-200215 contacts →

Indirect evidence

“Outbound is broken when it’s built only on volume.”

Source: RevenueBase Database · checked Sep 14, 2026
24Partial evidenceWaltham, MA, United StatesHQ checked Sep 14, 2026201-500206 contacts →

Partial evidence

“Allego is the first and only Revenue Enablement Platform to lead across digital selling, content management, learning, and coaching.”

Source: RevenueBase Database · checked Sep 14, 2026
25Indirect evidenceSan Bernardino, CA, United StatesHQ checked Sep 14, 202651-200205 contacts →

Indirect evidence

“WorkSpan is the #1 co-sell management network that empowers companies to turbocharge and scale their co-sell revenue growth.”

Source: RevenueBase Database · checked Sep 14, 2026

Showing 25 of 1,067 sales engagement platforms based in the United States

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Sales engagement platforms based in the United States at a glance

As of Sep 14, 2026
45.5%Verified-email coverage
37.2Average contacts per company
1-10Median size (employees)
10.5%Largest-city concentration · San Francisco
Sep 14, 2026Page data refreshed

Companies by employee count

1-10
551
11-50
362
51-200
116
201-500
20
501-1,000
9
1,001-5,000
6
5,001-10,000
2
10001+
1

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 1,067 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 sales engagement platforms, 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 “sales engagement platforms”. 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 sales engagement platforms), 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 sales engagement platforms, 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, 18,065 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 14, 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.

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 sales engagement platforms, 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 sales engagement platforms are there based in the United States?

RevenueBase identified 1,067 sales engagement platforms 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?

Hubspot, headquartered in Cambridge, tops this list with the largest team on record.

Which city has the most sales engagement platforms?

San Francisco leads with 112 headquartered companies, followed by New York (73) and Austin (33).

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 18,065 verified decision-maker contacts tracked across these 1,067 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 14, 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.