Company lists · Data refreshed September 2026

Top 17 Client billing and invoicing software companies based in the United Kingdom

RevenueBase identified 58 company matches for client billing and invoicing software companies associated with the United Kingdom as of September 2026 and tracks 695 professional contacts across them, including 295 with verified work emails. London is the largest hub.

This list covers company matches for client billing and invoicing 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 27, 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 27, 2026 How this list was built
58Companies
695Contacts tracked
295Verified emails
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The 17 largest client billing and invoicing software companies based in the United Kingdom

Ranked by team size
Top 17 of 58 company matches for client billing and invoicing software companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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 27, 2026501-1,000337 contacts →

Exact match

“We power small business growth.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20051 contacts →

Exact match

“Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchKettering, United KingdomHQ recorded Sep 27, 202651-20041 contacts →

Exact match

“Pegasus Software is one of the UK's leading suppliers of accounting software, cloud accounting software, business solutions and payroll software and has been for over 30 years.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchCroydon, United KingdomHQ recorded Sep 27, 202651-20019 contacts →

Exact match

“CHANGING TECHNOLOGIES At NEXUM we adopt an open mind to product and commercial strategy.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchBristol, United KingdomHQ recorded Sep 27, 202611-5014 contacts →

Exact match

“Our software increases the chances of winning work with fantastic looking interactive quotes and simple connections to the best accounting and payments services out there.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchWatchfield, United KingdomHQ recorded Sep 27, 202611-5012 contacts →

Exact match

“Billing and Collections Management are business-critical – more businesses fail through poor cashflow management than for any other reason.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchKettering, United KingdomHQ recorded Sep 27, 202611-5010 contacts →

Exact match

“Innovative software solutions; enhancing business performance At Redfish, our mission is to provide innovative software solutions that support a customer’s business objectives…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchWimbourne, United KingdomHQ recorded Sep 27, 202611-508 contacts →

Exact match

“We build straightforward software that helps merchant businesses run better - from the trade counter to the back office.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-105 contacts →

Exact match

“We're building NabyPay into a world-class invoicing and payments app that simplifies how you bill clients, helps you get paid faster, and is more affordable than ever before for…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-105 contacts →

Exact match

“Invoiceberry is an online invoicing software which has been especially designed to help small businesses, sole traders and freelancers in running their business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchWinnersh, United KingdomHQ recorded Sep 27, 202611-504 contacts →

Exact match

“ebpSource is the most experienced team in the international electronic billing and payment industry.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-104 contacts →

Exact match

“We are empowering service providers to get paid faster.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchBasingstoke, United KingdomHQ recorded Sep 27, 202611-504 contacts →

Exact match

“Intelligent Billing, by PRD Technologies offers a complete range of data collection, processing and billing solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchCanterbury, United KingdomHQ recorded Sep 27, 202611-503 contacts →

Exact match

“A truly independent company we deliver tailored & innovative billing and operation software solutions to telecoms & ICT resellers.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchHove, United KingdomHQ recorded Sep 27, 20261-102 contacts →

Exact match

“Redware Research Limited is a software house and consultancy located on the south coast of England specialising in accounting and billing solutions for Microsoft Dynamics 365 CRM…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchShetland, United KingdomHQ recorded Sep 27, 20261-101 contacts →

Exact match

“Our flagship product,"Groundleader", is scheduling-and-billing software.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-101 contacts →

Exact match

“Hoof provides the tools that businesses need to prosper.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 17 of 58 client billing and invoicing software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 295 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Client billing and invoicing software companies based in the United Kingdom at a glance

As of Sep 27, 2026
42.4%Verified-email coverage
12.0Average contacts per company
1-10Median size (employees)
46.6%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
34
11-50
19
51-200
4
501-1,000
1

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 58 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 “client billing and invoicing 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 295 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 27, 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 “client billing and invoicing software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many client billing and invoicing software companies are there based in the United Kingdom?

RevenueBase identified 58 company matches for client billing and invoicing 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?

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

Which city has the most client billing and invoicing software companies?

London leads with 27 company records, followed by Birmingham (2) and Croydon (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 295 professional contacts with verified work emails tracked across these 58 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 27, 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.