Company lists · Data refreshed September 2026

Top 25 Search algorithm consulting firms based in London, United Kingdom

Name: Search algorithm consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 72 companies tracked

RevenueBase identified 72 search algorithm consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 744 professional contacts across them, including 257 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers search algorithm consulting firms 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 29, 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 29, 2026 86% judged on-target in blind review

72Companies

744Contacts tracked

257Verified emails

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The 25 largest search algorithm consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 72 search algorithm consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to search algorithm consulting firms: 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	Hanover	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	109 contacts →
	Indirect evidence “From a small London office to a global presence, Hanover has grown by helping organisations worldwide unlock potential at every stage of their talent journey.” Source: RevenueBase Database · checked Sep 29, 2026
2	FRG Technology Consulting	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	94 contacts →
	Partial evidence “At FRG Technology Consulting, we help job seekers all over the world to find the best IT and emerging technology roles across a range of industries, including Banking and…” Source: RevenueBase Database · checked Sep 29, 2026
3	Suso Digital	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	52 contacts →
	Partial evidence “SUSO Digital is an award-winning SEO and AI Search agency.” Source: RevenueBase Database · checked Sep 29, 2026
4	SKALE	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	51 contacts →
	Partial evidence “Skale is an AI-search-first organic growth agency for SaaS and tech brands.” Source: RevenueBase Database · checked Sep 29, 2026
5	Tandem Search	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	47 contacts →
	Partial evidence “After years of close collaboration Bluefin Talent & NSI Talent have merged to produce Tandem Search, a Global Professional Services Search firm serving clients from across the UK…” Source: RevenueBase Database · checked Sep 29, 2026
6	Nicholson Search And Selection	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	31 contacts →
	Indirect evidence “Finding great people with the functional skills, market knowledge and the right personality, is what we do.” Source: RevenueBase Database · checked Sep 29, 2026
7	Adaptive Business Group	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	29 contacts →
	Indirect evidence “Adaptive Business Group serves an international client base via recruitment and M&A advisory teams across our offices in London, New York, San Diego, Singapore and Berlin.” Source: RevenueBase Database · checked Sep 29, 2026
8	NSI Talent	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	25 contacts →
	Strong evidence “NSI Talent is a specialized executive search and talent acquisition firm specialized in the Management, Strategy and Technology Consulting space Our local offices boast a wealth…” Source: RevenueBase Database · checked Sep 29, 2026
9	Resource Professionals	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	21 contacts →
	Partial evidence “Resource Professionals are a firm of search consultants specialising in the recruitment to recruitment market.” Source: RevenueBase Database · checked Sep 29, 2026
10	AGS Associates	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	19 contacts →
	Strong evidence “AGS Associates is a distinguished Executive Search and Consulting firm.” Source: RevenueBase Database · checked Sep 29, 2026
11	Hutton Consulting	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	17 contacts →
	Partial evidence “Hutton is a global executive search firm specialising in the sourcing of talent, introduction of capital and provision of market intelligence within the alternative investment…” Source: RevenueBase Database · checked Sep 29, 2026
12	Radiant Search	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	13 contacts →
	Partial evidence “We help executive search firms hire outstanding talent.” Source: RevenueBase Database · checked Sep 29, 2026
13	Bourne Consulting	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	12 contacts →
	Partial evidence “At Bourne Consulting, our mission is clear: to match top-tier talent with opportunities that align perfectly with their skills and ambitions.” Source: RevenueBase Database · checked Sep 29, 2026
14	Vantage Market Entry	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	11 contacts →
	Partial evidence “Founded in 2001, Vantage Market Entry is a Notting Hill based Executive Search firm focused on the delivery of executives, teams and acquisitions to the global Management…” Source: RevenueBase Database · checked Sep 29, 2026
15	Sease Information Retrieval Applied	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	10 contacts →
	Indirect evidence “Sease mission is to make research in Information Retrieval more accessible to an industry audience, transforming the best research principles, ideas and implementations from…” Source: RevenueBase Database · checked Sep 29, 2026
16	Sario Partners	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	10 contacts →
	Strong evidence “Sario Partners is a boutique search firm for the management consulting space.” Source: RevenueBase Database · checked Sep 29, 2026
17	nimbl.ai	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	9 contacts →
	Partial evidence “We are a high-tech boutique search & selection consultancy, focused on working with only top-tier professionals within the Artificial Intelligence / Big Data / Cloud & Digital…” Source: RevenueBase Database · checked Sep 29, 2026
18	Winston FOX	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	7 contacts →
	Partial evidence “Winston Fox is a boutique and pro-active search firm operating almost exclusively within Quantitative Trading, Research and Technology.” Source: RevenueBase Database · checked Sep 29, 2026
19	Crasner Consulting	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	6 contacts →
	Strong evidence “Crasner Consulting is a pre-eminent force in legal search and consulting.” Source: RevenueBase Database · checked Sep 29, 2026
20	Lucena	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Partial evidence “Lucena is an executive search firm working exclusively in the technology sector.” Source: RevenueBase Database · checked Sep 29, 2026
21	Prosero Search	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	4 contacts →
	Partial evidence “Prosero Search is a multi-disciplined executive search firm focused on the professional services industries.” Source: RevenueBase Database · checked Sep 29, 2026
22	Expedition Search	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	4 contacts →
	Partial evidence “WE HELP COMPANIES HIRE THE BEST TALENT Expedition Search is a global executive search firm bridging the American and European talent markets.” Source: RevenueBase Database · checked Sep 29, 2026
23	Heston Rose	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	4 contacts →
	Strong evidence “Executive Search for Advisory & Consulting leadership hires.” Source: RevenueBase Database · checked Sep 29, 2026
24	Park Road	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Partial evidence “Park Road is a boutique Human Capital Consulting firm focused on the Professional Service's market.” Source: RevenueBase Database · checked Sep 29, 2026
25	Wundertalent	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “Award-winning Recruitment for SaaS and Technology companies.” Source: RevenueBase Database · checked Sep 29, 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: search algorithm consulting firms. 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 search algorithm consulting firms.
Partial evidence: Its own public description names part of search algorithm consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name search algorithm consulting firms. 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 72 search algorithm consulting firms based in London, United Kingdom

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Search algorithm consulting firms based in London, United Kingdom at a glance

As of Sep 29, 2026

34.5%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 72 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 search algorithm consulting firms, 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 “search algorithm consulting firms”. 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 search algorithm consulting firms), 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 search algorithm consulting firms, 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, 257 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 29, 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 search algorithm consulting firms, 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 search algorithm consulting firms are there based in London, United Kingdom?

RevenueBase identified 72 search algorithm consulting firms 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?

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

Which city in the United Kingdom has the most search algorithm consulting firms?

London leads the United Kingdom with 72 headquartered companies, followed by Manchester (5) and Birmingham (3).

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 257 verified decision-maker contacts tracked across these 72 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 29, 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.