Company lists · Data refreshed September 2026

Top 25 Outsourced professional services based in the United Kingdom

Name: Outsourced professional services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 273 companies tracked

RevenueBase identified 273 outsourced professional services headquartered in the United Kingdom as of September 2026 and tracks 2,573 professional contacts across them, including 618 with verified work emails. London is the largest hub.

This list covers outsourced professional services headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

273Companies

2,573Contacts tracked

618Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest outsourced professional services based in the United Kingdom

Ranked by team size

Top 25 of 273 outsourced professional services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to outsourced professional services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Ubique Systems	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	333 contacts →
	Partial evidence “Ubique Systems is a fast growing multifaceted organization which offers a comprehensive array of outsourcing and consulting services for its customers, including recruitment…” Source: RevenueBase Database · checked Sep 21, 2026
2	The DOT HQ	Indirect evidence	Milton Keynes, United KingdomHQ checked Sep 21, 2026	51-200	146 contacts →
	Indirect evidence “At The Dot HQ, we empower businesses with a full spectrum of offshore resource solutions, ensuring efficiency, compliance and growth.” Source: RevenueBase Database · checked Sep 21, 2026
3	Initor Global UK	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	108 contacts →
	Indirect evidence “As attention turns to the new fiscal year, accountants across the UK are finalising plans to boost growth and productivity and improve profitability.” Source: RevenueBase Database · checked Sep 21, 2026
4	Solvex Solutions	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	103 contacts →
	Partial evidence “we redefine business process outsourcing, empowering companies to broaden their horizons.” Source: RevenueBase Database · checked Sep 21, 2026
5	Purchase Direct LTD	Partial evidence	Welwyn Garden City, United KingdomHQ checked Sep 21, 2026	51-200	80 contacts →
	Partial evidence “Purchase Direct provides outsourced purchasing services to businesses requiring long term management and control of their overhead purchasing.” Source: RevenueBase Database · checked Sep 21, 2026
6	Industry Resource Services IRS Group	Indirect evidence	Beccles, United KingdomHQ checked Sep 21, 2026	11-50	47 contacts →
	Indirect evidence “Leading providers of specialist support services.” Source: RevenueBase Database · checked Sep 21, 2026
7	Factotum	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	41 contacts →
	Indirect evidence “Welcome to Factotum-your secret weapon for streamlined business success!” Source: RevenueBase Database · checked Sep 21, 2026
8	Go-To Outsourcing	Partial evidence	Bromsgrove, United KingdomHQ checked Sep 21, 2026	11-50	32 contacts →
	Partial evidence “Almost every business can save time and money with smart outsourcing from Go-To - how much depends on you.” Source: RevenueBase Database · checked Sep 21, 2026
9	Connect Systems LTD	Partial evidence	Chesham, United KingdomHQ checked Sep 21, 2026	11-50	31 contacts →
	Partial evidence “Connect Systems are based in Chesham Bucks and were established in 1992 to provide professional IT services to the SMB market place.” Source: RevenueBase Database · checked Sep 21, 2026
10	Gloopro	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	27 contacts →
	Indirect evidence “Gloopro Procurement Systems uses a Managed Service Provider (MSP) model to provide Procurement-as-a-Service (PaaS) solutions to large enterprises, international oil companies and…” Source: RevenueBase Database · checked Sep 21, 2026
11	Freedom Outsourcing	Partial evidence	Sutton Coldfield, United KingdomHQ checked Sep 21, 2026	11-50	25 contacts →
	Partial evidence “At Freedom Outsourcing, we specialise in Business Process Outsourcing (BPO) to help businesses save money and grow faster with UK managed outsourcing solutions.” Source: RevenueBase Database · checked Sep 21, 2026
12	Servicesnow Group	Indirect evidence	Borehamwood, United KingdomHQ checked Sep 21, 2026	201-500	25 contacts →
	Indirect evidence “Businesses today are under more pressure than ever before to reduce risk, drive efficiency and create consistency.” Source: RevenueBase Database · checked Sep 21, 2026
13	Oakford Advisors LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
14	The Knowledge Group	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1-10	23 contacts →
	Partial evidence “At tkg, we empower organisations to outsource better.” Source: RevenueBase Database · checked Sep 21, 2026
15	Propact Solutions	Partial evidence	Birmingham, United KingdomHQ checked Sep 21, 2026	11-50	22 contacts →
	Partial evidence “If you run an accountancy or bookkeeping firm, we can help you overcome your staff recruitment and retention challenges with our outsourcing and offshoring solutions that are…” Source: RevenueBase Database · checked Sep 21, 2026
16	Doshi Outsourcing	Indirect evidence	Croydon, United KingdomHQ checked Sep 21, 2026	201-500	20 contacts →
	Indirect evidence “In 1995 the Doshi family set up Doshi & Co in London as an accountancy practice for UK clients and simply offshored their very own back office in Gujarat, India in - a location…” Source: RevenueBase Database · checked Sep 21, 2026
17	Chartered Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “Chartered Solutions allows Professional Services firms to take on additional work without the added risk and responsibilities of hiring permanent employees.” Source: RevenueBase Database · checked Sep 21, 2026
18	FCL	Partial evidence	Waterlooville, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “Flamingo Contracting Limited (FCL) operates as a business support function, offering payroll outsourcing and sub-contracting solutions to companies wishing to focus their valuable…” Source: RevenueBase Database · checked Sep 21, 2026
19	Backoffice Nationwide LTD	Indirect evidence	Selby, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “Here at Backoffice we offer a choice of services designed to meet both the agency and operative’s needs.” Source: RevenueBase Database · checked Sep 21, 2026
20	Withall & CO LTD	Partial evidence	West Wickham, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “When you engage us to act as your outsourced finance team, we not only provide financial and business support, but in conjunction with our wider community of legal experts and tax…” Source: RevenueBase Database · checked Sep 21, 2026
21	BCA Accountants And Business Advisors	Indirect evidence	Hull, United KingdomHQ checked Sep 21, 2026	11-50	12 contacts →
	Indirect evidence “From the decision to start up, the development of strategic options and planning, the implementation of control & performance measurement systems, and profit distribution each…” Source: RevenueBase Database · checked Sep 21, 2026
22	BPO Search	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1-10	12 contacts →
	Partial evidence “Bpo Search provides advice to companies looking for the perfect outsourcing partner.” Source: RevenueBase Database · checked Sep 21, 2026
23	IH Solutions	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	12 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
24	Flying Colours Consultancy Limited	Indirect evidence	Bristol, United KingdomHQ checked Sep 21, 2026	11-50	12 contacts →
	Indirect evidence “We help clients make faster and smarter decisions, We are equipped with skilled employees that fits your needs to build cutting edge project as you desire, we are experts in…” Source: RevenueBase Database · checked Sep 21, 2026
25	Gravitate HR	Partial evidence	Edinburgh, United KingdomHQ checked Sep 21, 2026	1-10	11 contacts →
	Partial evidence “Gravitate HR offers outsourced HR services which are tailored to each organisations’ needs.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: outsourced professional services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names outsourced professional services.
Partial evidence: Its own public description names part of outsourced professional services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsourced professional services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 273 outsourced professional services based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 618 reachable decision-makers.

Free signup · no credit card

View the full list →

Outsourced professional services based in the United Kingdom at a glance

As of Sep 21, 2026

24.0%Verified-email coverage

9.4Average contacts per company

1-10Median size (employees)

34.8%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

157

11-50

51-200

201-500

501-1,000

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 273 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among outsourced professional services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “outsourced professional services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names outsourced professional services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among outsourced professional services, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 618 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Outsourced professional services by metro

Outsourced professional services in London95

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names outsourced professional services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many outsourced professional services are there based in the United Kingdom?

RevenueBase identified 273 outsourced professional services headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Ubique Systems, headquartered in London, tops this list with the largest team on record.

Which city has the most outsourced professional services?

London leads with 95 headquartered companies, followed by Manchester (9) and Bristol (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 618 verified decision-maker contacts tracked across these 273 companies.

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 273 outsourced professional services based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Outsourced professional services by geography

Browse the directory

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 Smart Search, 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.