Company lists · Data refreshed October 2026

Top 25 Marketing automation api developers based in the United States

RevenueBase identified 286 company matches for marketing automation api developers associated with the United States as of October 2026 and tracks 6,883 professional contacts across them, including 1,716 with verified work emails. New York is the largest hub.

This list covers company matches for marketing automation api 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 October 18, 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 Oct 18, 2026 How this list was built
286Companies
6,883Contacts tracked
1,716Verified emails
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The 25 largest marketing automation api developers based in the United States

Ranked by team size
Top 25 of 286 company matches for marketing automation api developers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 18, 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 matchAtlanta, GA, United StatesHQ recorded Oct 18, 20261,001-5,0001,395 contacts →

Exact match

“The Mailchimpossibilities are endless when you create, automate, and optimize your marketing with Mailchimp.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
2Exact matchChicago, IL, United StatesHQ recorded Oct 18, 2026501-1,0001,208 contacts →

Exact match

“Basis Technologies is a global provider of workflow automation, intelligence and programmatic trading software for the marketing enterprise.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
3Exact matchChicago, IL, United StatesHQ recorded Oct 18, 20261,001-5,000855 contacts →

Exact match

“ActiveCampaign is the AI-first autonomous marketing platform built to transform how marketers, agencies, and entrepreneurs work.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
4Exact matchSan Jose, CA, United StatesHQ recorded Oct 18, 20261,001-5,000577 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 · Oct 18, 2026 · View company records in RevenueBase
5Exact matchPortland, OR, United StatesHQ recorded Oct 18, 2026201-500217 contacts →

Exact match

“Act-On Software provides the innovative marketing automation platform for marketers who think big and act boldly.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
6Exact matchNew York, United StatesHQ recorded Oct 18, 202651-200178 contacts →

Exact match

“SendPulse is an AI-driven marketing platform that helps scaling businesses automate email and chatbot conversations.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
7Exact matchSan Jose, CA, United StatesHQ recorded Oct 18, 202651-200163 contacts →

Exact match

“RightWave provides Marketing Automation Services for B2B companies.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
8Exact matchDover County, DE, United StatesHQ recorded Oct 18, 202611-50114 contacts →

Exact match

“At Maino, we promise to deliver the best ROI on every dollar spent on your Digital Growth journey.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
9Exact matchSan Antonio, TX, United StatesHQ recorded Oct 18, 202651-200111 contacts →

Exact match

“Plataforma de Marketing Multicanal, simple y potenciado por IA.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
10Exact matchMinneapolis, MN, United StatesHQ recorded Oct 18, 202651-200100 contacts →

Exact match

“Build brand love with our marketing automation platform.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
11Exact matchNew York, IL, United StatesHQ recorded Oct 18, 202651-20088 contacts →

Exact match

“GrowthLoop is a Compound Marketing Engine that drives compound growth by accelerating the marketing cycle, using Agentic AI powered by your enterprise cloud data.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
12Exact matchLos Angeles, CA, United StatesHQ recorded Oct 18, 202651-20054 contacts →

Exact match

“MAXA is the real estate and mortgage industry's #1 marketing center.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
13Exact matchWilmington, DE, United StatesHQ recorded Oct 18, 202651-20053 contacts →

Exact match

“EngageBay offers innovative AI-powered marketing and sales tools designed for small to medium-sized businesses.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
14Exact matchDallas, TX, United StatesHQ recorded Oct 18, 202611-5043 contacts →

Exact match

“InfiniteChoice was founded on the belief that the innovative use of technology and automation can unlock greater choice and better experiences for customers and partners.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
15Exact matchSan Francisco, CA, United StatesHQ recorded Oct 18, 202611-5042 contacts →

Exact match

“Hi, we're Scalero.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
16Exact matchGreen Cove Springs, FL, United StatesHQ recorded Oct 18, 202651-20041 contacts →

Exact match

“Sendcrux labs is building sales and marketing automation tools to help organisations to achieve the following goals cost-effectively- Boost revenues- Lead Generation- Nurture…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
17Exact matchNorth Miami, FL, United StatesHQ recorded Oct 18, 202611-5032 contacts →

Exact match

“Where growth meets automation - Automated Marketing Cloud Company - We help you grow you revenue and improve your operations using automations, integrations and growth marketing…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
18Exact matchAtlanta, GA, United StatesHQ recorded Oct 18, 20261,001-5,00031 contacts →

Exact match

“Pardot is B2B Marketing Automation by Salesforce that allows marketing and sales teams to create, deploy, and manage online marketing campaigns that increase revenue and maximize…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
19Exact matchSan Jose, CA, United StatesHQ recorded Oct 18, 202651-20028 contacts →

Exact match

“SocialPulsar is an award-winning digital marketing - marketing automation company headquartered in San Francisco, Ca.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
20Exact matchSan Francisco, CA, United StatesHQ recorded Oct 18, 202651-20027 contacts →

Exact match

“Conversion is the agentic marketing automation platform built for B2B teams that want to move faster than their stack allows.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
21Exact matchNew York, NY, United StatesHQ recorded Oct 18, 202611-5026 contacts →

Exact match

“VBOUT is an AI-Enabled Marketing Platform that helps agencies and marketers grow with 14+ powerful marketing tools, integrated AI features, powerful automations, deep e-commerce…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
22Exact matchWoburn, MA, United StatesHQ recorded Oct 18, 202651-20025 contacts →

Exact match

“With Volly’s Marketing Automation Suite you can more easily capture, convert, and retain customers.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
23Exact matchSan Francisco, CA, United StatesHQ recorded Oct 18, 202611-5025 contacts →

Exact match

“Mailmunch is the one-stop lead generation and marketing platform that allows you to grow your business with lead capture and email automation tools to reach your audience with a…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
24Exact matchIndianapolis, IN, United StatesHQ recorded Oct 18, 202611-5023 contacts →

Exact match

“Tenon connects marketing automation with ServiceNow to complete the CRM lifecycle, ensuring seamless alignment across marketing, sales, and service.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
25Exact matchMilpitas, United StatesHQ recorded Oct 18, 202611-5022 contacts →

Exact match

“Scrollmark is changing social media marketing with our cutting-edge automation platform.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase

Showing 25 of 286 marketing automation api developers based in the United States

See the full list, filter by size, metro and specialty, and access 1,716 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Marketing automation api developers based in the United States at a glance

As of Oct 18, 2026
24.9%Verified-email coverage
24.1Average contacts per company
1-10Median size (employees)
5.2%Largest-city concentration · New York
Oct 18, 2026Page data refreshed

Companies by employee count

1-10
182
11-50
72
51-200
22
201-500
2
501-1,000
1
1,001-5,000
6
5,001-10,000
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 286 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 “marketing automation api 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 1,716 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 October 18, 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.

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 “marketing automation api developers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many marketing automation api developers are there based in the United States?

RevenueBase identified 286 company matches for marketing automation api developers associated with the United States as of October 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?

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

Which city has the most marketing automation api developers?

New York leads with 15 company records, followed by Los Angeles (12) and San Francisco (9).

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 1,716 professional contacts with verified work emails tracked across these 286 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 October 18, 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.