Company lists · Data refreshed September 2026

Top 25 Api-first customer platform software companies worldwide

RevenueBase identified 1,932 company matches for api-first customer platform software companies worldwide as of September 2026 and tracks 168,264 professional contacts across them, including 94,508 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for api-first customer platform software companies worldwide, 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 27, 2026. Country and city lists for api-first customer platform software companies follow the table.

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 27, 2026 How this list was built
1,932Companies
168,264Contacts tracked
94,508Verified emails
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The 25 largest api-first customer platform software companies worldwide

Ranked by team size
Top 25 of 1,932 company matches for api-first customer platform software companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 202610001+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 27, 2026 · View company records in RevenueBase
2Exact matchCambridge, MA, United StatesHQ recorded Sep 27, 20265,001-10,00011,077 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 27, 2026 · View company records in RevenueBase
3Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 20265,001-10,0006,047 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 27, 2026 · View company records in RevenueBase
4Exact matchStockholm, SwedenHQ recorded Sep 27, 20261,001-5,0002,934 contacts →

Exact match

“Sinch’s vision is to connect every business with every customer, everywhere in the world.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchBoston, MA, United StatesHQ recorded Sep 27, 20261,001-5,0002,789 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchDallas, TX, United StatesHQ recorded Sep 27, 20261,001-5,0002,412 contacts →

Exact match

“Thryv is an AI-powered platform built to help small businesses get found, win customers, and drive repeat sales.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchNew York, NY, United StatesHQ recorded Sep 27, 20261,001-5,0002,142 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 27, 2026 · View company records in RevenueBase
8Exact matchSao Paulo, BrazilHQ recorded Sep 27, 20261,001-5,0001,921 contacts →

Exact match

“Actionline is dedicated to connecting brands with their customers, strengthening their presence and value at every touchpoint.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchScottsdale, AZ, United StatesHQ recorded Sep 27, 20261,001-5,0001,638 contacts →

Exact match

“Build amazing customer experiences with Nextiva’s AI-powered platform.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchBengaluru, IndiaHQ recorded Sep 27, 2026501-1,0001,320 contacts →

Exact match

“Capillary Technologies, founded in 2012, is a technology-first company that delivers AI-based cloud-native SaaS programs and solutions, leading the automated Loyalty Management…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchNew York, United StatesHQ recorded Sep 27, 20261,001-5,0001,287 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 27, 2026 · View company records in RevenueBase
12Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 20261,001-5,0001,136 contacts →

Exact match

“Gainsight is the retention engine behind the world’s most customer-centric companies.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchIstanbul, TürkiyeHQ recorded Sep 27, 20261,001-5,0001,036 contacts →

Exact match

“Insider-one platform for individualized, cross-channel experiences-enables enterprise marketers to connect customer data across channels and systems, predict their future behavior…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 27, 2026201-500979 contacts →

Exact match

“TLC Worldwide is a global leader in customer engagement, loyalty, and reward solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 2026501-1,000908 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 27, 2026 · View company records in RevenueBase
16Exact matchVienna, GermanyHQ recorded Sep 27, 2026501-1,000831 contacts →

Exact match

“SAP Engagement Cloud (formerly SAP Emarsys) helps organizations power unique engagement by connecting real-time customer insights with the operational signals that run the…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchDenver, CO, United StatesHQ recorded Sep 27, 20261,001-5,000791 contacts →

Exact match

“EverCommerce is a leading service commerce platform, providing vertically-tailored, integrated SaaS solutions that help more than global service-based businesses accelerate…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchSao Paulo, BrazilHQ recorded Sep 27, 2026501-1,000787 contacts →

Exact match

“Proporcione experiências pessoais, envolventes e fluidas com o poder de Zenvia Customer Cloud, nossa IA completa que revolucionará a jornada dos seus clientes.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 2026501-1,000771 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 27, 2026 · View company records in RevenueBase
20Exact matchSaskatoon, SK, CanadaHQ recorded Sep 27, 2026501-1,000771 contacts →

Exact match

“Vendasta is the leading AI software company for customer acquisition and engagement, helping businesses get more customers.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchStates, SingaporeHQ recorded Sep 27, 20261,001-5,000752 contacts →

Exact match

“Founded in 2013, SHOPLINE is a leading and rapidly growing Software-as-a-Service (SaaS) provider, empowering retailers to level up their commerce, helping them to sell, market…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchBreda, NetherlandsHQ recorded Sep 27, 20261,001-5,000705 contacts →

Exact match

“CM.com (AMS: CMCOM) is a leading European technology company that helps organizations worldwide improve customer interactions through integrated solutions for communications…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 2026501-1,000702 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 27, 2026 · View company records in RevenueBase
24Exact matchSunnyvale, CA, United StatesHQ recorded Sep 27, 2026201-500648 contacts →

Exact match

“Evergent is the world’s leading provider of subscription and partner management solutions designed to help businesses grow by attracting and retaining millions of customers…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 2026501-1,000622 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 27, 2026 · View company records in RevenueBase

Showing 25 of 1,932 api-first customer platform software companies worldwide

See the full list, filter by size, metro and specialty, and access 94,508 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Api-first customer platform software companies worldwide at a glance

As of Sep 27, 2026
56.2%Verified-email coverage
87.1Average contacts per company
11-50Median size (employees)
2.8%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
890
11-50
668
51-200
241
201-500
75
501-1,000
24
1,001-5,000
24
5,001-10,000
2
10001+
6

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for api-first customer platform software companies are linked below.
What qualifies
Company records worldwide whose business descriptions match “api-first customer platform software companies” 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. 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 94,508 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 27, 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.

Api-first customer platform software companies by location

10 lists · largest first

Every Api-first customer platform software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “api-first customer platform software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many api-first customer platform software companies are there worldwide?

RevenueBase identified 1,932 company matches for api-first customer platform software companies worldwide 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 country has the most api-first customer platform software companies?

The United States leads with 450 companies, followed by India (163) and the United Kingdom (105). Every api-first customer platform software companies list by country and city is linked on this page.

Which city has the most api-first customer platform software companies?

London leads with 55 company records, followed by San Francisco (44) and New York (41).

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 94,508 professional contacts with verified work emails tracked across these 1,932 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 27, 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.