Company lists · Data refreshed September 2026

Top 25 AI engineering recruitment companies based in London, United Kingdom

Name: AI engineering recruitment companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 430 companies tracked

RevenueBase identified 430 AI engineering recruitment companies headquartered in London, United Kingdom as of September 2026 and tracks 3,854 professional contacts across them, including 1,085 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers AI engineering recruitment companies headquartered in London, 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

430Companies

3,854Contacts tracked

1,085Verified emails

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The 25 largest AI engineering recruitment companies based in London, United Kingdom

Ranked by team size

Top 25 of 430 AI engineering recruitment companies based in London, 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 engineering 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	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
2	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
3	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
4	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
5	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
6	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
7	GER Consultancy	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	n/a	102 contacts →
	Partial evidence “GER Consultancy specialises in the selection and provision of qualified and experienced engineering and technical personnel to clients within the Steel, Power Generation and Oil &…” Source: RevenueBase Database · checked Sep 27, 2026
8	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
9	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
10	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
11	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
12	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
13	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
14	Future Engineering Recruitment LTD	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	55 contacts →
	Indirect evidence “Since our inception in 2009, Future has built a reputation based on the quality of our service, our principles of honesty, integrity, efficiency and always doing the right thing…” Source: RevenueBase Database · checked Sep 27, 2026
15	Develop	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	47 contacts →
	Indirect evidence “Welcome to develop.” Source: RevenueBase Database · checked Sep 27, 2026
16	Falcon Smart IT Falconsmartit	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	41 contacts →
	Partial evidence “Global Specialist IT Recruitment Agency Leader in Digital Transformation, Business IT Solutions and IT Recruitment Specialists Falcon Smart IT is a Specialist recruitment agency…” Source: RevenueBase Database · checked Sep 27, 2026
17	Impala Search	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	39 contacts →
	Partial evidence “At Impala Search, we scale companies by securing the right talent, attracting the right investors, and adopting AI in ways that drive measurable impact.” Source: RevenueBase Database · checked Sep 27, 2026
18	Creative Recruitment Limited	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	39 contacts →
	Partial evidence “Creative Recruitment the UK’s most respected talent finder since 1995.” Source: RevenueBase Database · checked Sep 27, 2026
19	Moonshot Partners	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	38 contacts →
	Partial evidence “We believe in a future where humans dream and AI executes.” Source: RevenueBase Database · checked Sep 27, 2026
20	Parallel Consulting	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	33 contacts →
	Indirect evidence “We are Parallel!” Source: RevenueBase Database · checked Sep 27, 2026
21	BSV Recruitment Limited	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	30 contacts →
	Partial evidence “BSV Recruitment is a fast-paced business with the capacity to meet tough recruitment goals within challenging deadlines, without compromising quality.” Source: RevenueBase Database · checked Sep 27, 2026
22	SEER	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	29 contacts →
	Partial evidence “At Seer, we offer bespoke talent solutions, specialising in placing professionals in emerging tech industries such as AI, Blockchain, Machine Learning, AI Research, Crypto, and…” Source: RevenueBase Database · checked Sep 27, 2026
23	Reload Search LTD	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	23 contacts →
	Partial evidence “Reload Search is a boutique recruitment firm specialising in sourcing and relocating technology talent across the Globe.” Source: RevenueBase Database · checked Sep 27, 2026
24	Connect 4 Automotive	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	23 contacts →
	Partial evidence “Connect 4 Automotive is a specialist recruitment consultancy based in the Bishops Stortford, hertfordshire but actively delivering projects across Europe.” Source: RevenueBase Database · checked Sep 27, 2026
25	Brainpool AI	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	22 contacts →
	Partial evidence “Brainpool is an Artificial Intelligence services company powered by a global network of 500 AI and Machine Learning experts coming from some of the leading AI hubs such as UCL…” 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 engineering 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 engineering recruitment companies.
Partial evidence: Its own public description names part of AI engineering 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 engineering 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 430 AI engineering recruitment companies based in London, United Kingdom

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AI engineering recruitment companies based in London, United Kingdom at a glance

As of Sep 27, 2026

28.2%Verified-email coverage

9.0Average contacts per company

1-10Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

299

11-50

101

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 430 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 engineering 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 London, United Kingdom whose own description of what they do matches “AI engineering 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 engineering 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 engineering recruitment companies, and records with no verified work email. Companies headquartered outside London 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, 1,085 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.

AI engineering recruitment companies by metro in the United Kingdom

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 engineering 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 engineering recruitment companies are there based in London, United Kingdom?

RevenueBase identified 430 AI engineering recruitment companies headquartered in London, 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?

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

Which city in the United Kingdom has the most AI engineering recruitment companies?

London leads the United Kingdom with 430 headquartered companies, followed by Manchester (44) and Birmingham (31).

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 1,085 verified decision-maker contacts tracked across these 430 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.