Company lists · Data refreshed September 2026

Top 25 Customer engagement platform developers worldwide

Name: Customer engagement platform developers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 6,666 companies tracked

RevenueBase identified 6,666 customer engagement platform developers worldwide as of September 2026 and tracks 296,540 professional contacts across them, including 128,483 with verified work emails. The United States is the largest market and London the largest hub.

This list covers customer engagement platform developers 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 customer engagement platform developers 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

6,666Companies

296,540Contacts tracked

128,483Verified emails

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

The 25 largest customer engagement platform developers worldwide

Ranked by team size

Top 25 of 6,666 customer engagement platform developers worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to customer engagement platform developers: 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	Salesforce	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	10001+	86,470 contacts →
	Strong evidence “We're the #1 AI CRM-where humans with agents drive customer success together with AI, data, and Customer 360 apps on one platform.” Source: RevenueBase Database · checked Sep 28, 2026
2	Hubspot	Strong evidence	Cambridge, MA, United StatesHQ checked Sep 28, 2026	5,001-10,000	11,077 contacts →
	Strong evidence “HubSpot is a leading agentic customer platform that provides software and support to help businesses grow better.” Source: RevenueBase Database · checked Sep 28, 2026
3	Intouchcx	Indirect evidence	Winnipeg, MB, CanadaHQ checked Sep 28, 2026	10001+	8,992 contacts →
	Indirect evidence “We are IntouchCX, where innovation meets industry, where dreamers meet doers, and where scale meets soul.” Source: RevenueBase Database · checked Sep 28, 2026
4	Freshworks	Partial evidence	San Mateo, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	7,034 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
5	Twilio	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,047 contacts →
	Strong evidence “Today's leading companies trust Twilio's Customer Engagement Platform (CEP) to build direct, personalized relationships with their customers everywhere in the world.” Source: RevenueBase Database · checked Sep 28, 2026
6	Qualtrics	Indirect evidence	Provo, United StatesHQ checked Sep 28, 2026	5,001-10,000	5,735 contacts →
	Indirect evidence “Qualtrics is the leader in Experience Management.” Source: RevenueBase Database · checked Sep 28, 2026
7	Fusion CX	Partial evidence	Norcross, GA, United StatesHQ checked Sep 28, 2026	10001+	4,785 contacts →
	Partial evidence “At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Source: RevenueBase Database · checked Sep 28, 2026
8	Sprinklr	Strong evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,513 contacts →
	Strong evidence “Sprinklr is the definitive, AI-native platform for Unified Customer Experience Management (Unified-CXM), empowering brands to deliver extraordinary experiences at scale, across…” Source: RevenueBase Database · checked Sep 28, 2026
9	SINCH	Partial evidence	Stockholm, SwedenHQ checked Sep 28, 2026	1,001-5,000	2,934 contacts →
	Partial evidence “Sinch’s vision is to connect every business with every customer, everywhere in the world.” Source: RevenueBase Database · checked Sep 28, 2026
10	Klaviyo	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,789 contacts →
	Indirect evidence “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Source: RevenueBase Database · checked Sep 28, 2026
11	BRAZE	Strong evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,142 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
12	Contax S.A	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	10001+	2,114 contacts →
	Indirect evidence “Com uma vontade contagiante de fazer a diferença, a Contax é a única empresa do setor presente em toda a jornada de relacionamento do consumidor, com olhar humano e abordagem…” Source: RevenueBase Database · checked Sep 28, 2026
13	Medallia	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,006 contacts →
	Partial evidence “Medallia is the enterprise experience platform that turns every signal into decisive action.” Source: RevenueBase Database · checked Sep 28, 2026
14	Quantanite	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,991 contacts →
	Partial evidence “We believe customers and employees should be looked after, and every interaction is an opportunity for a conversation and to learn more about them.” Source: RevenueBase Database · checked Sep 28, 2026
15	Actionline	Partial evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	1,001-5,000	1,921 contacts →
	Partial evidence “Actionline is dedicated to connecting brands with their customers, strengthening their presence and value at every touchpoint.” Source: RevenueBase Database · checked Sep 28, 2026
16	Op360 Officepartners360	Partial evidence	Ridgefield, CT, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,777 contacts →
	Partial evidence “OP360, part of iQor CXBPO™, is a trusted partner in intelligent customer experience solutions for global brands.” Source: RevenueBase Database · checked Sep 28, 2026
17	Nextiva	Strong evidence	Scottsdale, AZ, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,638 contacts →
	Strong evidence “Build amazing customer experiences with Nextiva’s AI-powered platform.” Source: RevenueBase Database · checked Sep 28, 2026
18	BRM S.A.S	Indirect evidence	Bogotá, ColombiaHQ checked Sep 28, 2026	1,001-5,000	1,363 contacts →
	Indirect evidence “Las conexiones más poderosas surgen de interacciones sencillas que marcan la diferencia.” Source: RevenueBase Database · checked Sep 28, 2026
19	Talkdesk	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,316 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
20	Attentive	Partial evidence	New York, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,287 contacts →
	Partial evidence “Attentive® knows personalized customer experiences require both powerful technology and the right people behind it.” Source: RevenueBase Database · checked Sep 28, 2026
21	Unifycx	Strong evidence	Louisville, KY, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,270 contacts →
	Strong evidence “UnifyCX is a future-ready, next-generation customer experience platform that fuses the best of human expertise with advanced AI technology.” Source: RevenueBase Database · checked Sep 28, 2026
22	Netcore	Strong evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	1,265 contacts →
	Strong evidence “Netcore offers a Comprehensive Customer Engagement & Experience Suite that empowers marketers to create personalised customer experiences.” Source: RevenueBase Database · checked Sep 28, 2026
23	Uranet Projetos E Sistemas	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	5,001-10,000	1,158 contacts →
	Indirect evidence “A Uranet é uma referência no mercado em soluções de relacionamento com o cliente e em projetos que visam vendas de produtos e/ou serviços.” Source: RevenueBase Database · checked Sep 28, 2026
24	Insider	Strong evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	1,001-5,000	1,036 contacts →
	Strong evidence “Insider-one platform for individualized, cross-channel experiences-enables enterprise marketers to connect customer data across channels and systems, predict their future behavior…” Source: RevenueBase Database · checked Sep 28, 2026
25	TLC Worldwide	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	979 contacts →
	Strong evidence “TLC Worldwide is a global leader in customer engagement, loyalty, and reward solutions.” 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: customer engagement platform developers. 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 customer engagement platform developers.
Partial evidence: Its own public description names part of customer engagement platform developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name customer engagement platform developers. 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 6,666 customer engagement platform developers worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 128,483 reachable decision-makers.

Free signup · no credit card

View the full list →

Customer engagement platform developers worldwide at a glance

As of Sep 28, 2026

43.3%Verified-email coverage

44.5Average contacts per company

11-50Median size (employees)

2.6%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

2,999

11-50

2,400

51-200

851

201-500

220

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 customer engagement platform developers, 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 customer engagement platform developers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “customer engagement platform developers”. 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 customer engagement platform developers), 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 customer engagement platform developers, 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, 128,483 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.

Customer engagement platform developers by location

56 lists · largest first

Every Customer engagement platform developers 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 customer engagement platform developers, 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 customer engagement platform developers are there worldwide?

RevenueBase identified 6,666 customer engagement platform developers 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?

Salesforce, headquartered in San Francisco, tops this list with the largest team on record.

Which country has the most customer engagement platform developers?

The United States leads with 1,410 companies, followed by India (629) and Brazil (426). Every customer engagement platform developers list by country and city is linked on this page.

Which city has the most customer engagement platform developers?

London leads with 170 headquartered companies, followed by Sao Paulo (156) and New York (100).

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 128,483 verified decision-maker contacts tracked across these 6,666 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.

Ready to reach these companies? Verified emails and direct dials for all 6,666 customer engagement platform developers worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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 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.