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Company lists · Data refreshed September 2026

Top 25 Consultancy services based in Southampton, United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 130 companies tracked

RevenueBase identified 130 consultancy services headquartered in Southampton, United Kingdom as of September 2026 and tracks 530 professional contacts across them, including 163 with verified work emails. London is the largest hub.

This list covers consultancy services 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
130Companies
530Contacts tracked
163Verified emails
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The 25 largest consultancy services based in Southampton, United Kingdom

Ranked by team size
Top 25 of 130 consultancy services 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 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
HJS Accountants
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 202651-20077 contacts →

Indirect evidence

“If you are looking for a team of reliable, approachable, and proactive accountants and business advisers, who will work alongside you to help you succeed, then we can help.”

Source: RevenueBase Database · checked Sep 24, 2026
2
ITDEV
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 202611-5037 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
3
Just BE Maritime
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-1025 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
4
LSS Group
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-1013 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
5
Horizon Seven Consulting LTD
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-1011 contacts →

Indirect evidence

“Horizon Seven are specialists in visionary sourcing, a new breed of consulting firm that believes in helping businesses realise their future by leveraging the power of sourcing.”

Source: RevenueBase Database · checked Sep 24, 2026
6
Enims LTD
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 202611-5010 contacts →

Strong evidence

“enims is an environmental consultancy which provide a full range of comprehensive environmental services.”

Source: RevenueBase Database · checked Sep 24, 2026
7
Enterprise South
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 202611-5010 contacts →

Indirect evidence

“Enterprise South, part of Business South Group, offers impartial and confidential one to one advice from our team of nationally accredited business advisers who have years of…”

Source: RevenueBase Database · checked Sep 24, 2026
8
Merchant Agency
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 202611-508 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
9
Pure Human Resources LTD
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-107 contacts →

Indirect evidence

“Delivering excellence in everything people.”

Source: RevenueBase Database · checked Sep 24, 2026
10
Harrison Clarke Limited
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-107 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
11
LDOT
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-107 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
12
Bluejay Ecology
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-107 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
13
Sillence Hurn Building Consultancy LTD
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 202611-506 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
14
MFD Communication Infrastructure Limited
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 202611-505 contacts →

Strong evidence

“MFDCI are a leading construction consultancy, specialising in the inspection, design and project management of communication infrastructure.”

Source: RevenueBase Database · checked Sep 24, 2026
15
Zest Consultancy LTD
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-105 contacts →

Indirect evidence

“At Zest we help you win new business and retain loyal customers by developing profitable sales strategies, training you to generate high quality leads and improving your sales…”

Source: RevenueBase Database · checked Sep 24, 2026
16
Tellwright Consulting Limited
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-104 contacts →

Strong evidence

“Human Resources Consultancy specialising in the SME market throughout the UK”

Source: RevenueBase Database · checked Sep 24, 2026
17
ADD Agility
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 202611-504 contacts →

Indirect evidence

“As a Technology Leader, you understand the importance of agility and innovation in today's rapidly evolving digital landscape.”

Source: RevenueBase Database · checked Sep 24, 2026
18
Marina Solutions International Limited
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-103 contacts →

Strong evidence

“Marina Solutions International is highly experienced in providing innovative and bespoke consultancy services for marina and dry stack developers and operators, with an in-depth…”

Source: RevenueBase Database · checked Sep 24, 2026
19
Barclay Hamp
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-103 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
20
The Millions Chartered Certified Accountants
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-103 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
21
Ground Condition Consultants LTD
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-102 contacts →

Strong evidence

“Our mission is to provide clients across the United Kingdom with geo-environmental consultancy services for all types of development, from land acquisition support through to…”

Source: RevenueBase Database · checked Sep 24, 2026
22
Perfect Concept
Strong evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-102 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
23
Leverworks Business Consultants
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-102 contacts →

Indirect evidence

“Leverworks supports dynamic service businesses with knowledge, hard-earned experience and proven methodology.”

Source: RevenueBase Database · checked Sep 24, 2026
24
EWC Accountants Limited
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-102 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
25
LS Consulting & Finance
Indirect evidenceSouthampton, United KingdomHQ checked Sep 24, 20261-102 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

Showing 25 of 130 consultancy services based in Southampton, United Kingdom

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Consultancy services based in Southampton, United Kingdom at a glance

As of Sep 24, 2026
30.8%Verified-email coverage
4.1Average contacts per company
1-10Median size (employees)
6849.2%Largest-city concentration · London
Sep 24, 2026Page data refreshed

Companies by employee count

1-10
108
11-50
17
51-200
2
501-1,000
1

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 130 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 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 Southampton, United Kingdom whose own description of what they do matches “consultancy 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 consultancy 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 consultancy services, 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, 163 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 services 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 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 consultancy services are there based in Southampton, United Kingdom?

RevenueBase identified 130 consultancy services 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?

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

Which city has the most consultancy services?

London leads with 8904 headquartered companies, followed by Manchester (687) and Birmingham (395).

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 163 verified decision-maker contacts tracked across these 130 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.

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