Company lists · Data refreshed September 2026

Top 25 Outsource admin services based in the United Kingdom

RevenueBase identified 990 company matches for outsource admin services associated with the United Kingdom as of September 2026 and tracks 3,058 professional contacts across them, including 831 with verified work emails. London is the largest hub.

This list covers company matches for outsource admin services 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 21, 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 21, 2026 How this list was built
990Companies
3,058Contacts tracked
831Verified emails
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The 25 largest outsource admin services based in the United Kingdom

Ranked by team size
Top 25 of 990 company matches for outsource admin services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 21, 2026201-500311 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchEdinburgh, United KingdomHQ recorded Sep 21, 2026201-500220 contacts →

Exact match

“We deliver value by taking care of admin and non-core tasks, enabling the productivity of our clients’ stakeholders.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 21, 2026201-500103 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchGlasgow, United KingdomHQ recorded Sep 21, 202651-20074 contacts →

Exact match

“Streamline your business with our bespoke support services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchGodalming, United KingdomHQ recorded Sep 21, 202611-5049 contacts →

Exact match

“Get Ahead is a trusted partner for busy business owners who want high-quality, flexible support without the cost and commitment of hiring full-time staff.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchBeccles, United KingdomHQ recorded Sep 21, 202611-5047 contacts →

Exact match

“Leading providers of specialist support services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20041 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchBromsgrove, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
9Exact matchManchester, United KingdomHQ recorded Sep 21, 202611-5031 contacts →

Exact match

“Virtual PA and Secretarial Support as and when you need it.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchSutton Coldfield, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
12Exact matchDoncaster, United KingdomHQ recorded Sep 21, 202651-20024 contacts →

Exact match

“Welcome to Paragon Scotland Limited, where we provide comprehensive white-labelled admin, marketing, and customer support services to help businesses maintain a professional image…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchPreston, United KingdomHQ recorded Sep 21, 202611-5022 contacts →

Exact match

“Top Resource Group is your one-stop ally for all business outsourcing needs.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20019 contacts →

Exact match

“Designated PA provides flexible business support services to small business owners, consultants and professionals.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchEast Kilbride, United KingdomHQ recorded Sep 21, 202651-20019 contacts →

Exact match

“AGO Outsourcing is a leading provider of outsourced business services, including inbound and outbound customer service and outbound sales as well as social media engagement…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchHessle, United KingdomHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“At VIP, we are committed to providing brilliant customer service, always putting our clients first.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20016 contacts →

Exact match

“Kimon Services provides high-quality outsourced staff across various industries and disciplines, including customer service, data entry, call centres, marketing and sales support…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchSelby, United KingdomHQ recorded Sep 21, 202611-5015 contacts →

Exact match

“Here at Backoffice we offer a choice of services designed to meet both the agency and operative’s needs.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5012 contacts →

Exact match

“We bring our extensive industry experience to the hum-drum of finance, HR, operations, marketing and compliance so that you can focus on delivering the fun to your customers.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchWantage, United KingdomHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“We are Business Garage: providing business outsourcing and consultancy services for SMEs: Business Strategy, Financial Management, Payroll, Bookkeeping, HR Consultancy and more!”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchWolverhampton, United KingdomHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“At I'm Your PA, we're not just virtual assistants - we're your dedicated partners in business success.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchManchester, United KingdomHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“Helping businesses achieve big results by outsourcing.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchShifnal Shropshire, United KingdomHQ recorded Sep 21, 20261-109 contacts →

Exact match

“Operating from both the UK and the Philippines, Agility Outsourcing was founded with the mission of supporting small to medium-sized businesses in the UK in navigating the…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchCrawley, United KingdomHQ recorded Sep 21, 202611-508 contacts →

Exact match

“Efficiency Back Office Services (Pty) Ltd started in 2022 and is an outsourcing back-office administration company that specialises in providing skilled and fully managed…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchNorthampton, United KingdomHQ recorded Sep 21, 202611-508 contacts →

Exact match

“The Office Genie is the UK’s only multi-award-winning, five-star phone and business support service to give you a 100% delighted money-back guarantee.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 990 outsource admin services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 831 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Outsource admin services based in the United Kingdom at a glance

As of Sep 21, 2026
27.2%Verified-email coverage
3.1Average contacts per company
1-10Median size (employees)
17.2%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
878
11-50
85
51-200
19
201-500
5
1,001-5,000
1
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 990 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 “outsource admin services” 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 831 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 21, 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 “outsource admin services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many outsource admin services are there based in the United Kingdom?

RevenueBase identified 990 company matches for outsource admin services 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?

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

Which city has the most outsource admin services?

London leads with 170 company records, followed by Manchester (26) and Bristol (13).

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 831 professional contacts with verified work emails tracked across these 990 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 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 990 outsource admin services based in the United Kingdom. Start with a free account, no credit card.

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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.