Company lists · Data refreshed November 2026

Top 25 Sales engagement platform developers based in the United States

Name: Sales engagement platform developers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 1,562 companies tracked

RevenueBase identified 1,562 company matches for sales engagement platform developers associated with the United States as of November 2026 and tracks 35,563 professional contacts across them, including 12,238 with verified work emails. San Francisco is the largest hub.

This list covers company matches for sales engagement platform developers associated with the United States, 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 November 5, 2026.

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 Nov 5, 2026 How this list was built

1,562Companies

35,563Contacts tracked

12,238Verified emails

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The 25 largest sales engagement platform developers based in the United States

Ranked by team size

Top 25 of 1,562 company matches for sales engagement platform developers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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	Klaviyo	Exact match	Boston, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,980 contacts →
	Exact match “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	6sense	Exact match	San Francisco, TX, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,492 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Seismic	Exact match	San Diego, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,465 contacts →
	Exact match “Seismic is the global leader in enablement, helping organizations engage customers, enable teams, and ignite revenue growth.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	CLAY	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	1,191 contacts →
	Exact match “The creative tool for growth \| Go to market with unique data - and the ability to act on it” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	apollo.io	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	501-1,000	1,156 contacts →
	Exact match “Apollo is the AI GTM System that uniquely combines data, intelligence, and execution in one loop, helping every business find and win their next customer.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Cience	Exact match	Miami, FL, United StatesHQ recorded Nov 5, 2026	201-500	1,120 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Pipedrive	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	501-1,000	998 contacts →
	Exact match “Founded in 2010, Pipedrive is an easy and effective sales CRM that drives small business growth.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Highspot	Exact match	Seattle, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	914 contacts →
	Exact match “Highspot by Seismic is an AI platform for revenue execution that helps go-to-market teams turn intelligence into action.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Memoryblue	Exact match	Tysons, VA, United StatesHQ recorded Nov 5, 2026	501-1,000	741 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 · Nov 5, 2026 · View company records in RevenueBase
10	Adobe Marketo	Exact match	San Jose, GA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	573 contacts →
	Exact match “Adobe Marketo Engage offers the leading Engagement Platform that empowers marketers to build brand value, grow revenue, and prove impact.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	On24	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	501-1,000	543 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Saleshive	Exact match	Denver, CO, United StatesHQ recorded Nov 5, 2026	51-200	448 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	NOOKS	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	51-200	426 contacts →
	Exact match “Nooks is the Agent Workspace for intelligent outbound.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Callrail	Exact match	Atlanta, GA, United StatesHQ recorded Nov 5, 2026	201-500	351 contacts →
	Exact match “CallRail is the lead engagement platform that makes it easy for businesses to attract more leads, convert more customers, and optimize their marketing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Artisan	Exact match	San Francisco, United StatesHQ recorded Nov 5, 2026	51-200	306 contacts →
	Exact match “Artisan builds AI employees.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Warrior Plus	Exact match	Henderson, NV, United StatesHQ recorded Nov 5, 2026	n/a	270 contacts →
	Exact match “Best-in-class sales & marketing automation platform and marketplace for digital business owners and online marketers” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Planhat	Exact match	Los Angeles, CA, United StatesHQ recorded Nov 5, 2026	201-500	267 contacts →
	Exact match “Planhat is a customer platform where commercial teams work better.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	instantly.ai	Exact match	Sheridan, WY, United StatesHQ recorded Nov 5, 2026	51-200	261 contacts →
	Exact match “All-in-one outreach platform for business growth.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Tacton	Exact match	Chicago, IL, United StatesHQ recorded Nov 5, 2026	201-500	237 contacts →
	Exact match “Tacton is a leading SaaS company redefining buyer engagement for manufacturers of complex products.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Marketjoy, INC	Exact match	Pensacola, FL, United StatesHQ recorded Nov 5, 2026	51-200	232 contacts →
	Exact match “Founded in 2016 and headquartered in Pensacola, Florida, MarketJoy is a B2B lead generation, appointment generation and sales development partner built to deliver predictable…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Growth ERA	Exact match	Jacksonville, FL, United StatesHQ recorded Nov 5, 2026	51-200	212 contacts →
	Exact match “Growth Era (formerly nextsales) is a sales enablement company with a passion to empower the growth of ambitious B2B companies.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Allego	Exact match	Waltham, MA, United StatesHQ recorded Nov 5, 2026	201-500	211 contacts →
	Exact match “Allego is the first and only Revenue Enablement Platform to lead across digital selling, content management, learning, and coaching.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Salaria Sales Solutions	Exact match	Washington D.c., CO, United StatesHQ recorded Nov 5, 2026	51-200	204 contacts →
	Exact match “Salaria Sales Solutions is a B2B lead generation and sales development agency.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Leandata	Exact match	Santa Clara, CA, United StatesHQ recorded Nov 5, 2026	51-200	203 contacts →
	Exact match “Help your teams align to your customer’s journey by uniting your CRM data, signals, and tools from the first buying signal to closed-won and beyond.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Workspan	Exact match	San Bernardino, CA, United StatesHQ recorded Nov 5, 2026	51-200	194 contacts →
	Exact match “WorkSpan is the #1 co-sell management network that empowers companies to turbocharge and scale their co-sell revenue growth.” Recorded in the RevenueBase company graph · Nov 5, 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 engagement platform developers”. 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 1,562 sales engagement platform developers based in the United States

See the full list, filter by size, metro and specialty, and access 12,238 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sales engagement platform developers based in the United States at a glance

As of Nov 5, 2026

34.4%Verified-email coverage

22.8Average contacts per company

1-10Median size (employees)

9.0%Largest-city concentration · San Francisco

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

877

11-50

500

51-200

138

201-500

501-1,000

1,001-5,000

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 1,562 companies.

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.
What qualifies: Company records associated with the United States whose business descriptions match “sales engagement platform developers” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 12,238 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 November 5, 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 engagement platform developers by metro

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 engagement platform developers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sales engagement platform developers are there based in the United States?

RevenueBase identified 1,562 company matches for sales engagement platform developers associated with the United States as of November 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?

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

Which city has the most sales engagement platform developers?

San Francisco leads with 141 company records, followed by New York (123) and Austin (49).

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 12,238 professional contacts with verified work emails tracked across these 1,562 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 November 5, 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.