Company lists · Data refreshed November 2026

Top 25 Open source marketing automation software companies worldwide

RevenueBase identified 1,150 company matches for open source marketing automation software companies worldwide as of November 2026 and tracks 26,401 professional contacts across them, including 11,407 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for open source marketing automation 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 November 5, 2026. Country and city lists for open source marketing automation 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 Nov 5, 2026 How this list was built
1,150Companies
26,401Contacts tracked
11,407Verified emails
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The 25 largest open source marketing automation software companies worldwide

Ranked by team size
Top 25 of 1,150 company matches for open source marketing automation software companies worldwide, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchCambridge, United StatesHQ recorded Nov 5, 20265,001-10,00011,646 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 · Nov 5, 2026 · View company records in RevenueBase
2Exact matchAtlanta, GA, United StatesHQ recorded Nov 5, 20261,001-5,0001,430 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchParis, FranceHQ recorded Nov 5, 2026501-1,000889 contacts →

Exact match

“Brevo offers the most intuitive Customer Platform for the sustainable growth of all businesses and organizations (including nonprofits).”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchNashville, TN, United StatesHQ recorded Nov 5, 2026201-500650 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 · Nov 5, 2026 · View company records in RevenueBase
5Exact matchSan Jose, GA, United StatesHQ recorded Nov 5, 20261,001-5,000573 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
6Exact matchSunnyvale, CA, United StatesHQ recorded Nov 5, 202610001+387 contacts →

Exact match

“Collaborate, innovate and drive the business forward with HCLSoftware's Digital Transformation marketing software solution.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchHenderson, NV, United StatesHQ recorded Nov 5, 2026n/a270 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
8Exact matchPortland, OR, United StatesHQ recorded Nov 5, 2026201-500219 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 · Nov 5, 2026 · View company records in RevenueBase
9Exact matchNew York, United StatesHQ recorded Nov 5, 202651-200185 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 · Nov 5, 2026 · View company records in RevenueBase
10Exact matchMoscow, RussiaHQ recorded Nov 5, 2026201-500185 contacts →

Exact match

“Mindbox, облачная платформа автоматизации маркетинга.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchChandler, AZ, United StatesHQ recorded Nov 5, 2026201-500169 contacts →

Exact match

“With Keap, you'll easily capture, organize, track, and nurture all of your leads to increase sales and revenue.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchSan Jose, CA, United StatesHQ recorded Nov 5, 202651-200168 contacts →

Exact match

“RightWave provides Marketing Automation Services for B2B companies.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchStuttgart, GermanyHQ recorded Nov 5, 202651-200138 contacts →

Exact match

“DYMATRIX is one of the leading German software and solutions providers for customer centered and intelligent marketing.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchAtlanta, GA, United StatesHQ recorded Nov 5, 2026201-500127 contacts →

Exact match

“Click is the only complete marketing technology solution that is natively integrated with Microsoft Dynamics CRM.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchUnited StatesHQ recorded Nov 5, 2026501-1,000127 contacts →

Exact match

“Sendinblue is now @Brevo”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchSt. Louis, MO, United StatesHQ recorded Nov 5, 202651-200121 contacts →

Exact match

“Benchmark helps busy marketers move faster and make a bigger impact with email.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 5, 202651-200111 contacts →

Exact match

“At EmailClub, we are building the strongest CRM team on the market.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchLas Vegas, NV, United StatesHQ recorded Nov 5, 202651-200108 contacts →

Exact match

“Genesis Digital empowers entrepreneurs and small business owners to achieve financial freedom with affordable and easy-to-use marketing and sales automation software, and a…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchSan Antonio, United StatesHQ recorded Nov 5, 202651-200107 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchShatin, Hong KongHQ recorded Nov 5, 202651-20099 contacts →

Exact match

“Radica is a leading Marketing Automation Provider, we synergize technology, ideas and customer intelligence to acquire, manage and optimize e-database to create monetary value…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchLimassol, CyprusHQ recorded Nov 5, 2026201-50096 contacts →

Exact match

“The world moves swiftly, but we move even faster At Scale Final, we recognize the rapid evolution of the world day by day.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchWaverley, South AfricaHQ recorded Nov 5, 202651-20095 contacts →

Exact match

“Everlytic is a marketing messaging and automation platform that helps your business communicate better, smarter, and faster over email, SMS, voice broadcasting and web push.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchGuildford, United KingdomHQ recorded Nov 5, 202651-20090 contacts →

Exact match

“We are Spotler!”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24Exact matchTokyo, JapanHQ recorded Nov 5, 202651-20088 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25Exact matchIndianapolis, IN, United StatesHQ recorded Nov 5, 20261,001-5,00087 contacts →

Exact match

“ExactTarget is now the Salesforce Marketing Cloud - Visit them here: http://sforce.co/2nnCQU7 The Salesforce Marketing Cloud is the world’s most powerful digital marketing 1:1…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 1,150 open source marketing automation software companies worldwide

See the full list, filter by size, metro and specialty, and access 11,407 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Open source marketing automation software companies worldwide at a glance

As of Nov 5, 2026
43.2%Verified-email coverage
23.0Average contacts per company
1-10Median size (employees)
2.4%Largest-city concentration · London
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
640
11-50
351
51-200
112
201-500
18
501-1,000
9
1,001-5,000
12
5,001-10,000
1
10001+
3

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 open source marketing automation software companies are linked below.
What qualifies
Company records worldwide whose business descriptions match “open source marketing automation 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 11,407 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.

Open source marketing automation software companies by location

7 lists · largest first

Every Open source marketing automation 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 “open source marketing automation software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many open source marketing automation software companies are there worldwide?

RevenueBase identified 1,150 company matches for open source marketing automation software companies worldwide 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?

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

Which country has the most open source marketing automation software companies?

The United States leads with 335 companies, followed by India (96) and the United Kingdom (71). Every open source marketing automation software companies list by country and city is linked on this page.

Which city has the most open source marketing automation software companies?

London leads with 28 company records, followed by Bangalore (18) and New York (15).

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 11,407 professional contacts with verified work emails tracked across these 1,150 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.