Company lists · Data refreshed September 2026

Top 25 Customer engagement platform developers based in the United States

Name: Customer 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 Sep 28, 2026 1,410 companies tracked

RevenueBase identified 1,410 company matches for customer engagement platform developers associated with the United States as of September 2026 and tracks 174,393 professional contacts across them, including 95,482 with verified work emails. New York is the largest hub.

This list covers company matches for customer 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 September 28, 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 Sep 28, 2026 How this list was built

1,410Companies

174,393Contacts tracked

95,482Verified emails

Explore this list → Free signup · no credit card · 500 free credits

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

Ranked by team size

Top 25 of 1,410 company matches for customer engagement platform developers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Salesforce	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	10001+	86,470 contacts →
	Exact match “We're the #1 AI CRM-where humans with agents drive customer success together with AI, data, and Customer 360 apps on one platform.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Hubspot	Exact match	Cambridge, MA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	11,077 contacts →
	Exact match “HubSpot is a leading agentic customer platform that provides software and support to help businesses grow better.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Freshworks	Exact match	San Mateo, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	7,034 contacts →
	Exact match “Freshworks Inc.(NASDAQ: FRSH) is the AI-powered, unified service operations platform that is fast to deploy, intuitive to use, and enables every employee to be more productive.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Twilio	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	6,047 contacts →
	Exact match “Today's leading companies trust Twilio's Customer Engagement Platform (CEP) to build direct, personalized relationships with their customers everywhere in the world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Fusion CX	Exact match	Norcross, GA, United StatesHQ recorded Sep 28, 2026	10001+	4,785 contacts →
	Exact match “At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Sprinklr	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,513 contacts →
	Exact match “Sprinklr is the definitive, AI-native platform for Unified Customer Experience Management (Unified-CXM), empowering brands to deliver extraordinary experiences at scale, across…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Klaviyo	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,789 contacts →
	Exact match “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	BRAZE	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,142 contacts →
	Exact match “Braze is the leading customer engagement platform that empowers brands to Be Absolutely Engaging.™ Braze allows any marketer to collect and take action on any amount of data from…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Medallia	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,006 contacts →
	Exact match “Medallia is the enterprise experience platform that turns every signal into decisive action.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Op360 Officepartners360	Exact match	Ridgefield, CT, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,777 contacts →
	Exact match “OP360, part of iQor CXBPO™, is a trusted partner in intelligent customer experience solutions for global brands.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Nextiva	Exact match	Scottsdale, AZ, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,638 contacts →
	Exact match “Build amazing customer experiences with Nextiva’s AI-powered platform.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Talkdesk	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,316 contacts →
	Exact match “Talkdesk® is leading a new era in customer experience with Customer Experience Automation (CXA)-a new category and platform designed to automate the full complexity of modern…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Attentive	Exact match	New York, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,287 contacts →
	Exact match “Attentive® knows personalized customer experiences require both powerful technology and the right people behind it.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Unifycx	Exact match	Louisville, KY, United StatesHQ recorded Sep 28, 2026	5,001-10,000	1,270 contacts →
	Exact match “UnifyCX is a future-ready, next-generation customer experience platform that fuses the best of human expertise with advanced AI technology.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Moengage	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	908 contacts →
	Exact match “MoEngage is an agentic customer engagement platform for the customer-obsessed marketers and product owners.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	MTI	Exact match	Hillsboro, OR, United StatesHQ recorded Sep 28, 2026	501-1,000	847 contacts →
	Exact match “MTI is a technology innovator working to enhance customer interactions with major brands across the globe.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Marigold	Exact match	Nashville, TN, United StatesHQ recorded Sep 28, 2026	201-500	820 contacts →
	Exact match “Marigold is a global marketing technology company focused on delivering relationship marketing solutions for growing organizations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Aircall	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	804 contacts →
	Exact match “The collaborative, AI-powered platform for customer conversations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Iterable	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	771 contacts →
	Exact match “Iterable is the AI customer engagement platform built for enterprise scale, loved by teams, and trusted by global brands like Priceline, Fabletics, Blockchain, and Box.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Khoros	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	763 contacts →
	Exact match “Khoros' award-winning enterprise software makes it easier for complex brands to engage with customers at scale across digital, social, and brand-owned channels.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Applovin	Exact match	Palo Alto, CA, United StatesHQ recorded Sep 28, 2026	201-500	733 contacts →
	Exact match “AppLovin helps businesses of any size reach over a billion people who play mobile games every day.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Clevertap	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	702 contacts →
	Exact match “CleverTap is the leading all-in-one customer engagement platform that helps brands unlock limitless customer lifetime value.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Movable INK	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	672 contacts →
	Exact match “Movable Ink helps marketers create more relevant customer experiences across email, mobile, and web through data activation, AI-powered decisioning, and personalization at scale.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	On24	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	622 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 · Sep 28, 2026 · View company records in RevenueBase
25	Adobe Marketo	Exact match	San Jose, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	572 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 · Sep 28, 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 “customer 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 1,410 customer engagement platform developers based in the United States

See the full list, filter by size, metro and specialty, and access 95,482 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

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

As of Sep 28, 2026

54.8%Verified-email coverage

123.7Average contacts per company

11-50Median size (employees)

7.3%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

594

11-50

497

51-200

202

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 1,410 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 “customer 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 95,482 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 September 28, 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.

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

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

RevenueBase identified 1,410 company matches for customer engagement platform developers associated with the United States as of September 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?

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

Which city has the most customer engagement platform developers?

New York leads with 103 company records, followed by San Francisco (80) and Austin (45).

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 95,482 professional contacts with verified work emails tracked across these 1,410 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 September 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,410 customer engagement platform developers based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Customer engagement platform developers by geography

Browse the directory

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.