Company lists · Data refreshed September 2026

Top 25 AI infrastructure engineers recruitment companies based in the United Kingdom

Name: AI infrastructure engineers recruitment companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 782 companies tracked

RevenueBase identified 782 AI infrastructure engineers recruitment companies headquartered in the United Kingdom as of September 2026 and tracks 8,037 professional contacts across them, including 2,417 with verified work emails. London is the largest hub.

This list covers AI infrastructure engineers recruitment companies 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 27, 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 27, 2026 86% judged on-target in blind review

782Companies

8,037Contacts tracked

2,417Verified emails

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The 25 largest AI infrastructure engineers recruitment companies based in the United Kingdom

Ranked by team size

Top 25 of 782 AI infrastructure engineers recruitment companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to AI infrastructure engineers recruitment companies: 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	Matchtech	Indirect evidence	Whiteley, United KingdomHQ checked Sep 27, 2026	201-500	754 contacts →
	Indirect evidence “At Matchtech, we do more than recruit.” Source: RevenueBase Database · checked Sep 27, 2026
2	Tangent International	Indirect evidence	Billericay, United KingdomHQ checked Sep 27, 2026	201-500	244 contacts →
	Indirect evidence “Tangent International Integrated Talent and Delivery across Technology and Communications.” Source: RevenueBase Database · checked Sep 27, 2026
3	Harnham	Strong evidence	Wimbledon, United KingdomHQ checked Sep 27, 2026	201-500	239 contacts →
	Strong evidence “Harnham provides specialist Data and AI recruitment and staffing services, along with bespoke training solutions, across multiple industry verticals, operating in the UK, the USA…” Source: RevenueBase Database · checked Sep 27, 2026
4	IC Resources	Indirect evidence	Reading, United KingdomHQ checked Sep 27, 2026	51-200	211 contacts →
	Indirect evidence “In the search for highly skilled talent, IC Resources has supported the technology community since We match great talent to deep-tech companies around the world.” Source: RevenueBase Database · checked Sep 27, 2026
5	Techtree	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	n/a	188 contacts →
	Strong evidence “TechTree is an AI-powered recruitment platform that combines a proprietary talent data platform, predictive AI, and a network of human recruiters to deliver the right candidates…” Source: RevenueBase Database · checked Sep 27, 2026
6	Proactive Global	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	155 contacts →
	Partial evidence “Connecting the world's leading engineering and technical talent with organisations driving innovation in automation, manufacturing, and advanced technology.” Source: RevenueBase Database · checked Sep 27, 2026
7	XCEDE	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	145 contacts →
	Partial evidence “Global Technology Recruitment Specialists.” Source: RevenueBase Database · checked Sep 27, 2026
8	Explore Group	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	143 contacts →
	Indirect evidence “The Explore Group has been helping companies recruit top talent in the ever-evolving world of technology since 2005.” Source: RevenueBase Database · checked Sep 27, 2026
9	Hamilton Barnes	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	139 contacts →
	Partial evidence “Hamilton Barnes are an award-winning recruitment consultancy, here to help you secure the best talent and opportunities in the networking, telecommunications, data center and…” Source: RevenueBase Database · checked Sep 27, 2026
10	Hackajob	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	115 contacts →
	Partial evidence “hackajob has the AI hiring tools trusted by enterprises, scale-ups, and 1M+ tech professionals worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
11	Square ONE Resources	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	108 contacts →
	Partial evidence “With over 25 years in the technology recruitment sector, Square One is an award-winning specialist recruitment agency.” Source: RevenueBase Database · checked Sep 27, 2026
12	Venturi	Indirect evidence	Manchester, United KingdomHQ checked Sep 27, 2026	51-200	101 contacts →
	Indirect evidence “It’s everything we stand for.” Source: RevenueBase Database · checked Sep 27, 2026
13	Colibri Digital	Partial evidence	Welwyn, United KingdomHQ checked Sep 27, 2026	51-200	93 contacts →
	Partial evidence “Colibri Digital is at the frontier of AI, Big Data and Cloud Computing.” Source: RevenueBase Database · checked Sep 27, 2026
14	Acolyte Group	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	91 contacts →
	Partial evidence “Acolyte’s mission is simple: To offer employers the insight and recruitment solutions they need for direct, scalable and cost-effective access to the high-quality talent required…” Source: RevenueBase Database · checked Sep 27, 2026
15	Montash	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	86 contacts →
	Partial evidence “Specialist technology recruitment.” Source: RevenueBase Database · checked Sep 27, 2026
16	SER Limited	Indirect evidence	Blackburn, United KingdomHQ checked Sep 27, 2026	11-50	73 contacts →
	Indirect evidence “Welcome to SER (Staffing) Ltd specialist technical recruiters Established in 2002 we work with major organisations across the World helping them source and recruit technical…” Source: RevenueBase Database · checked Sep 27, 2026
17	KDR Talent Solutions	Indirect evidence	Knutsford, United KingdomHQ checked Sep 27, 2026	11-50	70 contacts →
	Indirect evidence “Welcome to KDR Talent Solutions – home of the best talent solutions & jobs for the data, analytics and technology community KDR Talent Solutions is a specialist data, analytics…” Source: RevenueBase Database · checked Sep 27, 2026
18	Deploy Recruitment Group	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	69 contacts →
	Strong evidence “Infrastructure and technology experts; Deploy Recruitment Group provides quality and safe turnkey solutions across Rail and Infrastructure, Engineering and Manufacturing, Energy…” Source: RevenueBase Database · checked Sep 27, 2026
19	Employment Solutions	Partial evidence	Bury, United KingdomHQ checked Sep 27, 2026	11-50	69 contacts →
	Partial evidence “For over two decades, Employment Solutions has been matching qualified and forward-thinking candidates with some of the biggest engineering, manufacturing, and technology…” Source: RevenueBase Database · checked Sep 27, 2026
20	Twentyai	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	68 contacts →
	Partial evidence “TwentyAI is a talent and staffing solutions firm that combines cutting-edge AI technology, deep data insights, and human expertise to connect top talent with outstanding…” Source: RevenueBase Database · checked Sep 27, 2026
21	BIG Cloud	Partial evidence	Manchester, United KingdomHQ checked Sep 27, 2026	n/a	63 contacts →
	Partial evidence “Helping innovative start-ups and fast-growing Tech companies rapidly scale their AI and Machine Learning teams.” Source: RevenueBase Database · checked Sep 27, 2026
22	Signify Technology	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	61 contacts →
	Strong evidence “We aim to build exceptional teams in the tech space, focusing on two core engineering specialisms: Advanced Software Engineering and AI, ML, & Data Engineering.” Source: RevenueBase Database · checked Sep 27, 2026
23	European Recruitment	Partial evidence	Sussex, United KingdomHQ checked Sep 27, 2026	51-200	60 contacts →
	Partial evidence “European Recruitment is a technology recruitment company serving the global tech industry since 2009.” Source: RevenueBase Database · checked Sep 27, 2026
24	Third Republic	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	60 contacts →
	Partial evidence “Salesforce and AI Workforce Solutions For The Companies Of Tomorrow Registered Salesforce Partner Approved Staff Augmentation Vendor to Salesforce and Amazon Bringing together AI…” Source: RevenueBase Database · checked Sep 27, 2026
25	Trinnovo Group B Corp	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	59 contacts →
	Indirect evidence “Global Provider of Specialist Staffing & Consultancy Solutions Fully licensed across UK \| Ireland \| Switzerland (SECO)\| Germany (AUG)\| North America Certified B Corp – part of a…” Source: RevenueBase Database · checked Sep 27, 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: AI infrastructure engineers recruitment companies. 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 AI infrastructure engineers recruitment companies.
Partial evidence: Its own public description names part of AI infrastructure engineers recruitment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name AI infrastructure engineers recruitment companies. 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 782 AI infrastructure engineers recruitment companies based in the United Kingdom

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AI infrastructure engineers recruitment companies based in the United Kingdom at a glance

As of Sep 27, 2026

30.1%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

53.2%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

539

11-50

182

51-200

201-500

501-1,000

1,001-5,000

10001+

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 782 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 AI infrastructure engineers recruitment companies, 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 “AI infrastructure engineers recruitment companies”. 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 AI infrastructure engineers recruitment companies), 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 AI infrastructure engineers recruitment companies, 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, 2,417 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 27, 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.

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 AI infrastructure engineers recruitment companies, 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 AI infrastructure engineers recruitment companies are there based in the United Kingdom?

RevenueBase identified 782 AI infrastructure engineers recruitment companies 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?

Matchtech, headquartered in Whiteley, tops this list with the largest team on record.

Which city has the most AI infrastructure engineers recruitment companies?

London leads with 416 headquartered companies, followed by Manchester (34) and Bristol (23).

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 2,417 verified decision-maker contacts tracked across these 782 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 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 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.