Company lists · Data refreshed November 2026
Top 22 Open source email marketing software companies based in the United Kingdom
RevenueBase identified 81 company matches for open source email marketing software companies associated with the United Kingdom as of November 2026 and tracks 788 professional contacts across them, including 258 with verified work emails. London is the largest hub.
This list covers company matches for open source email marketing software companies associated with the United Kingdom, 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.
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.
The 22 largest open source email marketing software companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 298 contacts → | ||||
Exact match “Let’s be real.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 2 | 111 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 | |||||
| 3 | 90 contacts → | ||||
Exact match “We are Spotler!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 4 | 29 contacts → | ||||
Exact match “KlickTipp offers innovative email marketing and marketing automation services and it is the first learning email marketing solution with unique tagging system.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 5 | 26 contacts → | ||||
Exact match “Deliver the perfect email straight to your audience's inbox and grow a thriving customer base with Moosend.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 6 | 16 contacts → | ||||
Exact match “We help small businesses grow with the power of email marketing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 7 | 14 contacts → | ||||
Exact match “EmailOctopus offers email marketing for next to nothing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 8 | 8 contacts → | ||||
Exact match “We are MailXpertise, a global ESP (email service provider), specialists in made-to-measure email and SMS solutions for marketing professionals.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 9 | 7 contacts → | ||||
Exact match “We are an email marketing platform that really packs a punch!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 10 | 6 contacts → | ||||
Exact match “Integrated Interest brings together the best of both worlds, your email sender (platforms like MailChimp, Constant Contact and DotMailer to name a few) and your CRM/Management…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 11 | 4 contacts → | ||||
Exact match “Email Blaster UK offer cloud based email marketing software.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 12 | 4 contacts → | ||||
Exact match “Unlock unprecedented growth with Power Play's revolutionary email strategies.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 13 | 2 contacts → | ||||
Exact match “Zoom Mail is a UK based Email Marketing Company.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 14 | 2 contacts → | ||||
Exact match “WizEmail is an email marketing company formed by marketing specialists totalling decades of years experience in the direct marketing, internet and publishing sectors.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 15 | 2 contacts → | ||||
Exact match “We've reimagined email marketing, distilling years of agency expertise into software.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 16 | 2 contacts → | ||||
Exact match “Now Marketing owns and operates an SaaS platform that provides Email & SMS Broadcast Technology to the Marketing Industry; generating monthly broadcast volumes in the Millions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 17 | 1 contacts → | ||||
Exact match “Email Marketing & CRM services for startups” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 18 | 1 contacts → | ||||
Exact match “Astonish Email is a cloud-based email marketing system designed specifically for ambitious small businesses.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 19 | 1 contacts → | ||||
Exact match “Once upon a time – well, not so long ago – a group of tech enthusiasts (hey there, nice to meet you!) came up with a great new idea, lifetime free email marketing for all.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 20 | 1 contacts → | ||||
Exact match “MailPimps’ reason for existence is to take tired, unloved email campaigns and pimp them up!” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 21 | 1 contacts → | ||||
Exact match “Full migration from existing ESP to Klaviyo Account setup + Essential flows A/B testing and optimisation Flows overhaul Campaign content Monthly reporting and strategy Quarterly…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 22 | 1 contacts → | ||||
Exact match “Red Circle Digital will help you get the most from your email marketing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “open source email marketing software companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 22 of 81 open source email marketing software companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 258 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Open source email marketing software companies based in the United Kingdom at a glance
As of Nov 5, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 81 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 Kingdom whose business descriptions match “open source email marketing 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. 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 258 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 email marketing software companies by metro
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 email marketing software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many open source email marketing software companies are there based in the United Kingdom?
RevenueBase identified 81 company matches for open source email marketing software companies associated with the United Kingdom 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?
Omnisend tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most open source email marketing software companies?
London leads with 39 company records, followed by Manchester (4) and Chesterfield (2).
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 258 professional contacts with verified work emails tracked across these 81 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.
Ready to reach these companies? Verified emails and direct dials for all 81 open source email marketing software companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Open source email marketing software companies by geography
- Open source email marketing software companies based in the United States
- Open source email marketing software companies based in London, United Kingdom
- Open source email marketing software companies based in Canada
- Open source email marketing software companies based in France
- Open source email marketing software companies based in Germany
- Open source email marketing software companies based in India
- Open source email marketing software companies based in the Netherlands
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.
More company lists
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- Open source email marketing software companies based in the United States
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- Open source email marketing software companies based in Canada
- Open source email marketing software companies based in France
- Open source email marketing software companies based in Germany
- Open source email marketing software companies based in India
Company intelligence · public preview
Top 22 open source email marketing software companies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 81 matching company records for open source email marketing software companies based in the United Kingdom, with 788 tracked contacts and 258 verified work emails.
This public preview shows 22 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 22 open source email marketing software companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Omnisendomnisend.comHQ: Global, United KingdomReported employees: 201-500 | Global, United Kingdom | 201-500 | Exact match | 298 contacts → |
“Let’s be real.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Emailclubemailclub.ioHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 111 contacts → |
“At EmailClub, we are building the strongest CRM team on the market.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Spotler UKspotler.comHQ: Guildford, United KingdomReported employees: 51-200 | Guildford, United Kingdom | 51-200 | Exact match | 90 contacts → |
“We are Spotler!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Klicktippklicktipp.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 29 contacts → |
“KlickTipp offers innovative email marketing and marketing automation services and it is the first learning email marketing solution with unique tagging system.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Moosendmoosend.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Deliver the perfect email straight to your audience's inbox and grow a thriving customer base with Moosend.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  TOP Marketing Mediatopmarketingmedia.comHQ: Preston, United KingdomReported employees: 1-10 | Preston, United Kingdom | 1-10 | Exact match | 16 contacts → |
“We help small businesses grow with the power of email marketing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Emailoctopusemailoctopus.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 14 contacts → |
“EmailOctopus offers email marketing for next to nothing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Mailxpertisemailxpertise.comHQ: Ashford, United KingdomReported employees: 11-50 | Ashford, United Kingdom | 11-50 | Exact match | 8 contacts → |
“We are MailXpertise, a global ESP (email service provider), specialists in made-to-measure email and SMS solutions for marketing professionals.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Mmunicmailmmunic.co.ukHQ: Chester, United KingdomReported employees: 1-10 | Chester, United Kingdom | 1-10 | Exact match | 7 contacts → |
“We are an email marketing platform that really packs a punch!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Integrated Interestintegratedinterest.comHQ: Chesterfield, United KingdomReported employees: 1-10 | Chesterfield, United Kingdom | 1-10 | Exact match | 6 contacts → |
“Integrated Interest brings together the best of both worlds, your email sender (platforms like MailChimp, Constant Contact and DotMailer to name a few) and your CRM/Management…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Email Blaster UKemailblasteruk.comHQ: Towcester, United KingdomReported employees: 11-50 | Towcester, United Kingdom | 11-50 | Exact match | 4 contacts → |
“Email Blaster UK offer cloud based email marketing software.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Power Play Cold Email Infrastructurejoinpowerplay.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 4 contacts → |
“Unlock unprecedented growth with Power Play's revolutionary email strategies.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Zoommail Email Marketing & Marketing Stackzoommail.co.ukHQ: Plymouth, United KingdomReported employees: 1-10 | Plymouth, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Zoom Mail is a UK based Email Marketing Company.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Wizemailwizemail.co.ukHQ: Croydon, United KingdomReported employees: 1-10 | Croydon, United Kingdom | 1-10 | Exact match | 2 contacts → |
“WizEmail is an email marketing company formed by marketing specialists totalling decades of years experience in the direct marketing, internet and publishing sectors.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Magicalsmagicals.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“We've reimagined email marketing, distilling years of agency expertise into software.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  NOW Marketing Global Limitednowmarketing.co.ukHQ: Hove, United KingdomReported employees: 1-10 | Hove, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Now Marketing owns and operates an SaaS platform that provides Email & SMS Broadcast Technology to the Marketing Industry; generating monthly broadcast volumes in the Millions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Mailflowmailflow.so HQ: Manchester, United KingdomReported employees: 1-10 | Manchester, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Email Marketing & CRM services for startups” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Astonish Emailastonishemail.comHQ: Andover, United KingdomReported employees: 1-10 | Andover, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Astonish Email is a cloud-based email marketing system designed specifically for ambitious small businesses.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Emailoutemailout.comHQ: Surrey, United KingdomReported employees: 1-10 | Surrey, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Once upon a time – well, not so long ago – a group of tech enthusiasts (hey there, nice to meet you!) came up with a great new idea, lifetime free email marketing for all.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Mailpimpsmailpimps.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 1 contacts → |
“MailPimps’ reason for existence is to take tired, unloved email campaigns and pimp them up!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Cloud Chameleoncloudchameleon.co.ukHQ: Sutton Coldfield, United KingdomReported employees: 1-10 | Sutton Coldfield, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Full migration from existing ESP to Klaviyo Account setup + Essential flows A/B testing and optimisation Flows overhaul Campaign content Monthly reporting and strategy Quarterly…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  RED Circle Digitalredcircledigital.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Red Circle Digital will help you get the most from your email marketing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 22 of 81 company matches
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Open source email marketing software companies: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
77 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 81 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Open source email marketing software companies by metro
Questions about this company list
What does Exact match mean for open source email marketing software companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many open source email marketing software companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 81 matching company records, 788 tracked contacts and 258 verified emails. The public preview displays 22 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Open source email marketing software companies by geography
- Open source email marketing software companies based in the United States
- Open source email marketing software companies based in London, United Kingdom
- Open source email marketing software companies based in Canada
- Open source email marketing software companies based in France
- Open source email marketing software companies based in Germany
- Open source email marketing software companies based in India
- Open source email marketing software companies based in the Netherlands
Cite this list
RevenueBase Data Team. Top 22 open source email marketing software companies based in the United Kingdom. Snapshot: November 5, 2026. https://revenuebase.ai/companies/open-source-email-marketing-software-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Open source email marketing software companies based in the United States
- Open source email marketing software companies based in London, United Kingdom
- Open source email marketing software companies based in Canada
- Open source email marketing software companies based in France
- Open source email marketing software companies based in Germany
- Open source email marketing software companies based in India
Company intelligence · public preview
Top 22 open source email marketing software companies based in the United Kingdom
RevenueBase records 81 matching company records for open source email marketing software companies based in the United Kingdom, with 788 tracked contacts and 258 verified work emails.
This public preview shows 22 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 22 open source email marketing software companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Omnisendomnisend.com HQ: Global, United KingdomReported employees: 201-500 | Global, United Kingdom | 201-500 | Exact match | 298 contacts → |
“Let’s be real.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Emailclubemailclub.io HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 111 contacts → |
“At EmailClub, we are building the strongest CRM team on the market.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Spotler UKspotler.com HQ: Guildford, United KingdomReported employees: 51-200 | Guildford, United Kingdom | 51-200 | Exact match | 90 contacts → |
“We are Spotler!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Klicktippklicktipp.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 29 contacts → |
“KlickTipp offers innovative email marketing and marketing automation services and it is the first learning email marketing solution with unique tagging system.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Moosendmoosend.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Deliver the perfect email straight to your audience's inbox and grow a thriving customer base with Moosend.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | TOP Marketing Mediatopmarketingmedia.com HQ: Preston, United KingdomReported employees: 1-10 | Preston, United Kingdom | 1-10 | Exact match | 16 contacts → |
“We help small businesses grow with the power of email marketing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Emailoctopusemailoctopus.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 14 contacts → |
“EmailOctopus offers email marketing for next to nothing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Mailxpertisemailxpertise.com HQ: Ashford, United KingdomReported employees: 11-50 | Ashford, United Kingdom | 11-50 | Exact match | 8 contacts → |
“We are MailXpertise, a global ESP (email service provider), specialists in made-to-measure email and SMS solutions for marketing professionals.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Mmunicmailmmunic.co.uk HQ: Chester, United KingdomReported employees: 1-10 | Chester, United Kingdom | 1-10 | Exact match | 7 contacts → |
“We are an email marketing platform that really packs a punch!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Integrated Interestintegratedinterest.com HQ: Chesterfield, United KingdomReported employees: 1-10 | Chesterfield, United Kingdom | 1-10 | Exact match | 6 contacts → |
“Integrated Interest brings together the best of both worlds, your email sender (platforms like MailChimp, Constant Contact and DotMailer to name a few) and your CRM/Management…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Email Blaster UKemailblasteruk.com HQ: Towcester, United KingdomReported employees: 11-50 | Towcester, United Kingdom | 11-50 | Exact match | 4 contacts → |
“Email Blaster UK offer cloud based email marketing software.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Power Play Cold Email Infrastructurejoinpowerplay.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 4 contacts → |
“Unlock unprecedented growth with Power Play's revolutionary email strategies.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Zoommail Email Marketing & Marketing Stackzoommail.co.uk HQ: Plymouth, United KingdomReported employees: 1-10 | Plymouth, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Zoom Mail is a UK based Email Marketing Company.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Wizemailwizemail.co.uk HQ: Croydon, United KingdomReported employees: 1-10 | Croydon, United Kingdom | 1-10 | Exact match | 2 contacts → |
“WizEmail is an email marketing company formed by marketing specialists totalling decades of years experience in the direct marketing, internet and publishing sectors.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Magicalsmagicals.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 2 contacts → |
“We've reimagined email marketing, distilling years of agency expertise into software.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | NOW Marketing Global Limitednowmarketing.co.uk HQ: Hove, United KingdomReported employees: 1-10 | Hove, United Kingdom | 1-10 | Exact match | 2 contacts → |
“Now Marketing owns and operates an SaaS platform that provides Email & SMS Broadcast Technology to the Marketing Industry; generating monthly broadcast volumes in the Millions.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Mailflowmailflow.so HQ: Manchester, United KingdomReported employees: 1-10 | Manchester, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Email Marketing & CRM services for startups” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Astonish Emailastonishemail.com HQ: Andover, United KingdomReported employees: 1-10 | Andover, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Astonish Email is a cloud-based email marketing system designed specifically for ambitious small businesses.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Emailoutemailout.com HQ: Surrey, United KingdomReported employees: 1-10 | Surrey, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Once upon a time – well, not so long ago – a group of tech enthusiasts (hey there, nice to meet you!) came up with a great new idea, lifetime free email marketing for all.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Mailpimpsmailpimps.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 1 contacts → |
“MailPimps’ reason for existence is to take tired, unloved email campaigns and pimp them up!” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Cloud Chameleoncloudchameleon.co.uk HQ: Sutton Coldfield, United KingdomReported employees: 1-10 | Sutton Coldfield, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Full migration from existing ESP to Klaviyo Account setup + Essential flows A/B testing and optimisation Flows overhaul Campaign content Monthly reporting and strategy Quarterly…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | RED Circle Digitalredcircledigital.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 1 contacts → |
“Red Circle Digital will help you get the most from your email marketing.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 22 of 81 company matches
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Open source email marketing software companies: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
77 records in the displayed employee bands.
4 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 81 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Open source email marketing software companies by metro
Questions about this company list
What does Exact match mean for open source email marketing software companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many open source email marketing software companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 81 matching company records, 788 tracked contacts and 258 verified emails. The public preview displays 22 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Open source email marketing software companies by geography
- Open source email marketing software companies based in the United States
- Open source email marketing software companies based in London, United Kingdom
- Open source email marketing software companies based in Canada
- Open source email marketing software companies based in France
- Open source email marketing software companies based in Germany
- Open source email marketing software companies based in India
- Open source email marketing software companies based in the Netherlands
Cite this list
RevenueBase Data Team. Top 22 open source email marketing software companies based in the United Kingdom. Snapshot: November 5, 2026. https://revenuebase.ai/companies/open-source-email-marketing-software-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Open source email marketing software companies based in Canada
- Open source email marketing software companies based in France
- Open source email marketing software companies based in Germany
- Open source email marketing software companies based in India