Company lists · Data refreshed September 2026

Top 25 Back office outsourcing firms based in the United Kingdom

RevenueBase identified 415 company matches for back office outsourcing firms associated with the United Kingdom as of September 2026 and tracks 5,979 professional contacts across them, including 1,132 with verified work emails. London is the largest hub.

This list covers company matches for back office outsourcing firms 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
415Companies
5,979Contacts tracked
1,132Verified emails
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The 25 largest back office outsourcing firms based in the United Kingdom

Ranked by team size
Top 25 of 415 company matches for back office outsourcing firms 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 matchHarrow, United KingdomHQ recorded Sep 27, 2026201-500477 contacts →

Exact match

“Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 27, 2026501-1,000322 contacts →

Exact match

“At SKS, we pride ourselves on being different.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 27, 2026201-500311 contacts →

Exact match

“GI Outsourcing is a UK-based accountants outsourcing firm.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchMilton Keynes, United KingdomHQ recorded Sep 27, 202651-200146 contacts →

Exact match

“At The Dot HQ, we empower businesses with a full spectrum of offshore resource solutions, ensuring efficiency, compliance and growth.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchManchester, United KingdomHQ recorded Sep 27, 2026201-500118 contacts →

Exact match

“Focus is a UK-managed outsourcing partner with a large dedicated offshore delivery team, built and proven inside real UK retail operations before we opened it to other brands.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 27, 2026201-500103 contacts →

Exact match

“we redefine business process outsourcing, empowering companies to broaden their horizons.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20090 contacts →

Exact match

“A world class offshore outsourcing agency, with offices in London and Harare, we have access to some of the best educated, best spoken graduates you will find anywhere in the…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchGlasgow, United KingdomHQ recorded Sep 27, 202651-20074 contacts →

Exact match

“Streamline your business with our bespoke support services.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20070 contacts →

Exact match

“Invedus Outsourcing is a remote employees outsourcing company.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 27, 2026201-50070 contacts →

Exact match

“We are a 400 member strong, specialist business process outsourcing (BPO) provider that caters to the diverse and complex information processing needs of todays corporation.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20066 contacts →

Exact match

“QORMOTHO is a global outsourcing company.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20062 contacts →

Exact match

“Support Adventure is an outsourcing company that specializes in customer service and support.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchChandler's Ford, United KingdomHQ recorded Sep 27, 202651-20052 contacts →

Exact match

“We’re QUBA Solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchBeccles, United KingdomHQ recorded Sep 27, 202611-5047 contacts →

Exact match

“Leading providers of specialist support services.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20046 contacts →

Exact match

“Direct Response can provide outsourcing of voice, data and contact centre services for organisation from a global business to a one-man operation, delivering outstanding service…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20041 contacts →

Exact match

“Welcome to Factotum-your secret weapon for streamlined business success!”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchManchester, United KingdomHQ recorded Sep 27, 2026201-50036 contacts →

Exact match

“BPO & Technology Solutions | Contact Center Optimization | Scalable Operations As a leader at Sensible Group, I specialize in delivering high-performance BPO solutions tailored…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchUk, United KingdomHQ recorded Sep 27, 202651-20035 contacts →

Exact match

“Taskaler is a business process outsourcing (BPO) provider specialising in customer services and back-office support for retail and eCommerce.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchTyne & Wear, United KingdomHQ recorded Sep 27, 202611-5033 contacts →

Exact match

“We are an award-winning customer experience optimisation provider based in the UK, delivering seamless 24/7 back and front office solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchBromsgrove, United KingdomHQ recorded Sep 27, 202611-5032 contacts →

Exact match

“Almost every business can save time and money with smart outsourcing from Go-To - how much depends on you.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchEastbourne, United KingdomHQ recorded Sep 27, 202651-20031 contacts →

Exact match

“Started operations in the UK in the year 1990 and incorporated as “KINDCARE LIMITED”.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchLeeds, United KingdomHQ recorded Sep 27, 202651-20026 contacts →

Exact match

“SNT Group is a service led business, providing our clients with best of breed technologies and services.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchSutton Coldfield, United KingdomHQ recorded Sep 27, 202611-5025 contacts →

Exact match

“At Freedom Outsourcing, we specialise in Business Process Outsourcing (BPO) to help businesses save money and grow faster with UK managed outsourcing solutions.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchBorehamwood, United KingdomHQ recorded Sep 27, 2026201-50025 contacts →

Exact match

“Businesses today are under more pressure than ever before to reduce risk, drive efficiency and create consistency.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5024 contacts →

Exact match

“Oakford Advisors Ltd, a Centralis Group company, is an outsourced business services firm which specialises in providing back-office support to start-up or existing companies…”

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

Showing 25 of 415 back office outsourcing firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,132 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Back office outsourcing firms based in the United Kingdom at a glance

As of Sep 27, 2026
18.9%Verified-email coverage
14.4Average contacts per company
11-50Median size (employees)
33.5%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
188
11-50
136
51-200
55
201-500
22
501-1,000
8
1,001-5,000
1
5,001-10,000
2
10001+
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 415 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 “back office outsourcing firms” 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 1,132 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 “back office outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many back office outsourcing firms are there based in the United Kingdom?

RevenueBase identified 415 company matches for back office outsourcing firms 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?

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

Which city has the most back office outsourcing firms?

London leads with 139 company records, followed by Manchester (14) and Birmingham (9).

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 1,132 professional contacts with verified work emails tracked across these 415 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.