Company lists · Data refreshed September 2026

Top 25 Consultancy companies based in Southampton, United Kingdom

Name: Consultancy companies based in Southampton, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 96 companies tracked

RevenueBase identified 96 consultancy companies headquartered in Southampton, United Kingdom as of September 2026 and tracks 362 professional contacts across them, including 108 with verified work emails. Across the United Kingdom, London is the largest hub for this category (6,437 companies); Southampton has 96.

This list covers consultancy companies headquartered in Southampton, 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 24, 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 24, 2026 86% judged on-target in blind review

96Companies

362Contacts tracked

108Verified emails

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The 25 largest consultancy companies based in Southampton, United Kingdom

Ranked by team size

Top 25 of 96 consultancy companies based in Southampton, United Kingdom, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to consultancy 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	ITDEV	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	11-50	37 contacts →
	Strong evidence “ITDev is a software and electronic engineering consultancy with a track record of outstanding quality and customer service spanning 20 years.” Source: RevenueBase Database · checked Sep 24, 2026
2	Just BE Maritime	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	25 contacts →
	Strong evidence “Just Be Maritime Ltd (JBM) is a collaboration between senior personnel within the maritime industry, who have come together to offer targeted Officer Cadet management consultancy…” Source: RevenueBase Database · checked Sep 24, 2026
3	LSS Group	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	13 contacts →
	Indirect evidence “LSS Group are a multi-disciplined company that work supporting Insolvency Practitioners with trading administrations providing turnkey solutions for Merchant Services and…” Source: RevenueBase Database · checked Sep 24, 2026
4	Enims LTD	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	11-50	10 contacts →
	Strong evidence “enims is an environmental consultancy which provide a full range of comprehensive environmental services.” Source: RevenueBase Database · checked Sep 24, 2026
5	NRG Resourcing	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	9 contacts →
	Strong evidence “NRG Resourcing are a Professional Recruitment Consultancy covering the whole of the UK We help Mortgage Broker Owners source the best, talented Mortgage Advisors for their…” Source: RevenueBase Database · checked Sep 24, 2026
6	Merchant Agency	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	11-50	8 contacts →
	Indirect evidence “We partner with forward-thinking change makers, committed to making an impact, and deliver effective marketing, communications, and technology programmes that yield results.” Source: RevenueBase Database · checked Sep 24, 2026
7	Pure Human Resources LTD	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	7 contacts →
	Indirect evidence “Delivering excellence in everything people.” Source: RevenueBase Database · checked Sep 24, 2026
8	Harrison Clarke Limited	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	7 contacts →
	Strong evidence “At Harrison Clarke, we provide a client-centric approach to building consultancy by first understanding our clients' needs and tailoring advice specifically to address clients'…” Source: RevenueBase Database · checked Sep 24, 2026
9	LDOT	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	7 contacts →
	Strong evidence “A digital consultancy helping businesses thrive online through creative marketing support, creative direction and consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
10	Bluejay Ecology	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	7 contacts →
	Strong evidence “BlueJay Ecology is a small ecological consultancy based in Hampshire, that was founded in 2018 by Jay Allen.” Source: RevenueBase Database · checked Sep 24, 2026
11	Sillence Hurn Building Consultancy LTD	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	11-50	6 contacts →
	Strong evidence “We are progressive building consultants and chartered surveyors providing solutions for commercial and residential clients across London and the South of England.” Source: RevenueBase Database · checked Sep 24, 2026
12	Tellwright Consulting Limited	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	4 contacts →
	Strong evidence “Human Resources Consultancy specialising in the SME market throughout the UK” Source: RevenueBase Database · checked Sep 24, 2026
13	Barclay Hamp	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “Barclay Hamp represents trustworthy expertise within agricultural inputs, the most important sector on our planet.” Source: RevenueBase Database · checked Sep 24, 2026
14	The Millions Chartered Certified Accountants	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “Finance & Accountancy • Accountancy services pro, systems design & implementation together with the IT & related MIS sys & processes.” Source: RevenueBase Database · checked Sep 24, 2026
15	Perfect Concept	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	2 contacts →
	Strong evidence “Perfect Concept is a specialised consultancy firm dedicated to fostering the growth of businesses in the UK and around the world through strategic planning across a variety of…” Source: RevenueBase Database · checked Sep 24, 2026
16	Leverworks Business Consultants	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	2 contacts →
	Indirect evidence “Leverworks supports dynamic service businesses with knowledge, hard-earned experience and proven methodology.” Source: RevenueBase Database · checked Sep 24, 2026
17	EWC Accountants Limited	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	2 contacts →
	Indirect evidence “We are an independent of chartered certified accountants servicing Hampshire, Isle of Wight and surrounding areas.” Source: RevenueBase Database · checked Sep 24, 2026
18	LS Consulting & Finance	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	2 contacts →
	Indirect evidence “At LS Consulting & Finance, Lisa is passionate about empowering SME business leaders to achieve their strategic goals.” Source: RevenueBase Database · checked Sep 24, 2026
19	Autrac LTD	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	2 contacts →
	Strong evidence “We are a close-knit management consultancy that provides expert support to the public sector and not for profit organisations.” Source: RevenueBase Database · checked Sep 24, 2026
20	MDC Advisory	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	2 contacts →
	Strong evidence “MDC Advisory is a business psychology and leadership consultancy with expertise across psychometric assessment, leadership assessment & executive coaching and organisational…” Source: RevenueBase Database · checked Sep 24, 2026
21	Hummingbee Works	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	2 contacts →
	Indirect evidence “Partnering with awesome recruitment SMEs, focusing on all things "people" to help the business flourish and people to thrive.” Source: RevenueBase Database · checked Sep 24, 2026
22	ITS Building People	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	51-200	1 contacts →
	Strong evidence “ITS is an accomplished recruitment consultancy agency with over 45 years of experience in supplying skilled, unskilled and professional personnel for temporary and permanent roles…” Source: RevenueBase Database · checked Sep 24, 2026
23	Stellamar	Strong evidence	Southampton, United KingdomHQ checked Sep 24, 2026	11-50	1 contacts →
	Strong evidence “Stellamar is a specialist headhunting & HR consultancy working exclusively in the luxury hospitality & UHNW sectors.” Source: RevenueBase Database · checked Sep 24, 2026
24	Expiric LTD	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	1 contacts →
	Indirect evidence “EXPIRIC LTD is a Management, Service & Technology consulting company based out of SOUTHAMPTON, United Kingdom.” Source: RevenueBase Database · checked Sep 24, 2026
25	Cain Consultancy LTD	Indirect evidence	Southampton, United KingdomHQ checked Sep 24, 2026	1-10	1 contacts →
	Indirect evidence “Bringing clarity and control back into the business of production where client and agency can work in harmony!” Source: RevenueBase Database · checked Sep 24, 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: consultancy 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 consultancy companies.
Partial evidence: Its own public description names part of consultancy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name consultancy 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 96 consultancy companies based in Southampton, United Kingdom

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Consultancy companies based in Southampton, United Kingdom at a glance

As of Sep 24, 2026

29.8%Verified-email coverage

3.8Average contacts per company

1-10Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured across the whole United Kingdom list rather than for Southampton, so it is reported there. Company counts and contact totals on this page are exact for Southampton, over 96 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 consultancy 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 Southampton, United Kingdom whose own description of what they do matches “consultancy 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 consultancy 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 consultancy companies, and records with no verified work email. Companies headquartered outside Southampton 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, 108 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 24, 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.

Consultancy 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 consultancy 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 consultancy companies are there based in Southampton, United Kingdom?

RevenueBase identified 96 consultancy companies headquartered in Southampton, 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?

ITDEV, headquartered in Southampton, tops this list with the largest team on record.

Which city in the United Kingdom has the most consultancy companies?

London leads the United Kingdom with 6,437 headquartered companies, followed by Manchester (502) and Bristol (278). Southampton has 96.

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 108 verified decision-maker contacts tracked across these 96 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 24, 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.