Company lists · Data refreshed September 2026

Top 13 Inbox placement software companies based in the United Kingdom

RevenueBase identified 34 company matches for inbox placement software companies associated with the United Kingdom as of September 2026 and tracks 131 professional contacts across them, including 41 with verified work emails and 6 with mobile numbers. London is the largest hub.

This list covers company matches for inbox placement 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 September 13, 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 Sep 13, 2026 How this list was built
34Companies
131Contacts tracked
41Verified emails
6Mobile numbers
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The 13 largest inbox placement software companies based in the United Kingdom

Ranked by team size
Top 13 of 34 company matches for inbox placement software companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 13, 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 matchLondon, United KingdomHQ recorded Sep 13, 202611-5030 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 13, 202611-5013 contacts →

Exact match

“iNBOTiQA is the next-generation Intelligent Business Email for high-volume and group mailboxes.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
3Exact matchAshford, United KingdomHQ recorded Sep 13, 202611-508 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 · Sep 13, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 13, 20261-106 contacts →

Exact match

“Unlock unprecedented growth with Power Play's revolutionary email strategies.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
5Exact matchTowcester, United KingdomHQ recorded Sep 13, 202611-504 contacts →

Exact match

“Email Blaster UK offer cloud based email marketing software.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 13, 20261-103 contacts →

Exact match

“About Us: At Mailyser, we are passionate about helping businesses and individuals maximize their email marketing potential.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
7Exact matchChesterfield, United KingdomHQ recorded Sep 13, 202611-502 contacts →

Exact match

“An Enterprise class email marketing platform, providing industry leading delivery rates.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
8Exact matchCroydon, United KingdomHQ recorded Sep 13, 20261-102 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 · Sep 13, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 13, 20261-102 contacts →

Exact match

“We've reimagined email marketing, distilling years of agency expertise into software.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 13, 20261-102 contacts →

Exact match

“Helping Recruiters With Email Deliverability.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 13, 20261-101 contacts →

Exact match

“Red Circle Digital will help you get the most from your email marketing.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 13, 20261-101 contacts →

Exact match

“InboxWizards help small to large email senders deliver their emails to the Inbox.”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 13, 20261-101 contacts →

Exact match

“MailPimps’ reason for existence is to take tired, unloved email campaigns and pimp them up!”

Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase

Showing 13 of 34 inbox placement software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 41 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Inbox placement software companies based in the United Kingdom at a glance

As of Sep 13, 2026
31.3%Verified-email coverage
4.6%Mobile-number coverage
3.9Average contacts per company
1-10Median size (employees)
52.9%Largest-city concentration · London
Sep 13, 2026Page data refreshed

Companies by employee count

1-10
24
11-50
7
51-200
1
201-500
2

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 16.0d

Company record updated

Median 65.0d

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 “inbox placement 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 41 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 13, 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 “inbox placement software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many inbox placement software companies are there based in the United Kingdom?

RevenueBase identified 34 company matches for inbox placement software companies associated with the United Kingdom 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?

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

Which city has the most inbox placement software companies?

London leads with 18 company records, followed by Ashford (1) and Burcote (1).

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 41 professional contacts with verified work emails tracked across these 34 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 13, 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.