Company lists · Data refreshed September 2026
Top 25 Transactional email software companies worldwide
RevenueBase identified 251 transactional email software companies worldwide as of September 2026 and tracks 2,992 professional contacts across them, including 974 with verified work emails and 0 with mobile numbers. The United States is the largest market and New York the largest hub.
This list covers transactional email software companies 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 14, 2026. Country and city lists for transactional email software companies 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.
The 25 largest transactional email software companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 275 contacts → | ||||
Indirect evidence “Let’s be real.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 190 contacts → | ||||
Partial evidence “Sinch Mailgun is the leading email delivery service for businesses around the world.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 137 contacts → | ||||
Indirect evidence “We believe powerful connections propel business growth.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 122 contacts → | ||||
Partial evidence “In 2005, we started as a web design agency, but we soon discovered email marketing and fell in love with it.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 115 contacts → | ||||
Partial evidence “Benchmark helps busy marketers move faster and make a bigger impact with email.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 90 contacts → | ||||
Partial evidence “For over 20 years, AWeber has helped entrepreneurs and small business owners connect with their prospects and customers through powerfully-simple email marketing solutions.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 88 contacts → | ||||
Partial evidence “Mailmodo is a complete email marketing solution enabling users to create and send app-like interactive emails to improve email conversions.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 80 contacts → | ||||
Partial evidence “Flodesk makes simple, intuitive software tools to help entrepreneurs grow their businesses.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 70 contacts → | ||||
Indirect evidence “At Litmus, we know the importance of continuous innovation.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 68 contacts → | ||||
Partial evidence “Niche Software Solutions is a software product company in the online marketing space.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 56 contacts → | ||||
Partial evidence “Email for developers” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 45 contacts → | ||||
Strong evidence “Kasplo is a cloud-based email delivery and management service designed to help businesses send transactional and marketing emails on a large scale.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 39 contacts → | ||||
Partial evidence “iPost is a leading email-sending platform purpose-built to solve real challenges in highly regulated and other data- and content-sensitive industries, including gaming, legal…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 38 contacts → | ||||
Partial evidence “SendGrid is a proven cloud-based customer communication platform that successfully delivers over 45 billion emails each month for Internet and mobile-based customers like Airbnb…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 37 contacts → | ||||
Partial evidence “WhatCounts is an email marketing and personalization platform empowering marketers to elevate customer targeting and daily email strategy and execution.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 36 contacts → | ||||
Partial evidence “Kit (formerly ConvertKit) helps serious creators like yourself craft epic emails, create powerful automations, and manage their audience all in a simple, intuitive platform.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 35 contacts → | ||||
Partial evidence “We are a marketing technology company that provides a state-of-the-art email, SMS & web-marketing platform.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 33 contacts → | ||||
Strong evidence “Enterprise Email Automation Software that Drives Conversions.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 30 contacts → | ||||
Partial evidence “Deliver the perfect email straight to your audience's inbox and grow a thriving customer base with Moosend.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 30 contacts → | ||||
Partial evidence “Since 2013, mailercloud has expanded to become one of the largest and most extensive cloud-based email services, that resolves the task of reliably delivering emails on behalf of…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 29 contacts → | ||||
Partial evidence “Folderly is an all-in-one email deliverability platform to supercharge your email performance.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 29 contacts → | ||||
Partial evidence “KlickTipp offers innovative email marketing and marketing automation services and it is the first learning email marketing solution with unique tagging system.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 28 contacts → | ||||
Partial evidence “Email Industries is a US-based email deliverability services provider that offers innovative products and services aimed at helping businesses like yours optimize their email…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 28 contacts → | ||||
Partial evidence “SMTP Mailer Provides best email marketing services, we are in first position in reputed email marketing company across the world.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 26 contacts → | ||||
Partial evidence “Empower your team to create, innovate, and grow with the Dyspatch Email Builder.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
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: transactional email software companies. 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 transactional email software companies.
- Partial evidence
- Its own public description names part of transactional email software companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name transactional email software companies. 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 251 transactional email software companies worldwide
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Transactional email software companies worldwide at a glance
As of Sep 14, 2026Companies by employee count
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 transactional email software companies, 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
- 3 countries, largest first: the United States, the United Kingdom, India. Country and city lists for transactional email software companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “transactional email software companies”. 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 transactional email software companies), 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 transactional email software companies, 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, 974 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 14, 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.
Transactional email software companies by location
3 lists · largest firstEvery Transactional email 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 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 transactional email software companies, 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 transactional email software companies are there worldwide?
RevenueBase identified 251 transactional email software companies 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?
Omnisend, headquartered in Global, tops this list with the largest team on record.
Which country has the most transactional email software companies?
The United States leads with 162 companies, followed by the United Kingdom (46) and India (43). Every transactional email software companies list by country and city is linked on this page.
Which city has the most transactional email software companies?
New York leads with 17 headquartered companies, followed by London (16) and Austin (11).
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 974 verified decision-maker contacts tracked across these 251 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 14, 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 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.