Company lists · Data refreshed September 2026

Top 25 Impact measurement accounting firms based in the United Kingdom

RevenueBase identified 137 company matches for impact measurement accounting firms associated with the United Kingdom as of September 2026 and tracks 1,081 professional contacts across them, including 476 with verified work emails. London is the largest hub.

This list covers company matches for impact measurement accounting firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
137Companies
1,081Contacts tracked
476Verified emails
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The 25 largest impact measurement accounting firms based in the United Kingdom

Ranked by team size
Top 25 of 137 company matches for impact measurement accounting firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-200116 contacts →

Exact match

“At Harris & Trotter, we believe your accountant should do a lot more than just report on how your business is doing – he or she should help you identify opportunities to improve…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-200104 contacts →

Exact match

“Welcome to Sayer Vincent, experts in auditing and advising charities and social purpose organisations.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchHemel Hempstead, United KingdomHQ recorded Sep 28, 2026501-1,000102 contacts →

Exact match

“SJD is now Caroola Accountancy!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchRugby, United KingdomHQ recorded Sep 28, 202651-20099 contacts →

Exact match

“Cottons was established in 1983 and has since grown to become one of the leading independent chartered accountancy firms in the UK, with offices in Rugby, Northampton, Daventry…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchCoventry, United KingdomHQ recorded Sep 28, 202611-5055 contacts →

Exact match

“Dafferns is a friendly, dynamic firm of accountants.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5049 contacts →

Exact match

“Our vision is a future where sustainable business is business as usual.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5032 contacts →

Exact match

“Beany are accountants for ambitious businesses, delivering big firm expertise without the big cost.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5031 contacts →

Exact match

“From consultancy to collaborative field-building, The Good Economy (TGE) is a recognised thought leader and the ‘go to’ firm for organisations looking to deliver and report on…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5022 contacts →

Exact match

“It’s never been more important for organisations to explore, align, amplify and communicate the positive impact you’re having.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchLancaster, United KingdomHQ recorded Sep 28, 202611-5018 contacts →

Exact match

“We help organisations understand their true impact on people and planet and inspire them to think and act differently to become truly sustainable.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchManchester, United KingdomHQ recorded Sep 28, 202611-5016 contacts →

Exact match

“Change just got real.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchSale, United KingdomHQ recorded Sep 28, 202611-5015 contacts →

Exact match

“A&C Chartered Accountants: Your Purpose-Led Independent Accounting Firm We are a modern and proactive accountancy practice, offering professional services to a wide range of small…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchCity Of London, United KingdomHQ recorded Sep 28, 202611-5012 contacts →

Exact match

“Welcome to RG Sciences, your premier destination for advanced data & analytics solutions in the impact investing space.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“Route2 collaborates with businesses, investors, and governments to quantify Value2Society™ (V2S™), a new metric of performance, forging links between financial performance and…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchBourne End, United KingdomHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“hivve (formally Vertigo Ventures - VV) empowers organisations and individuals around the world to understand, capture and demonstrate the impact of their research.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchMaidenhead, United KingdomHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“Founded in 2010 by Georgi Rollings, Starfish Accounting supports purpose-led businesses with clear, practical financial support that goes beyond compliance.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchAldershot, United KingdomHQ recorded Sep 28, 202611-509 contacts →

Exact match

“Hampshire Accountants have a wealth of experience.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchWarlingham, United KingdomHQ recorded Sep 28, 20261-108 contacts →

Exact match

“Eido Research was founded by Samuel and Ben on a shared passion and a shared frustration.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-108 contacts →

Exact match

“We help charities, social enterprises and purpose-driven businesses get their finances clear, compliant and well managed.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchHemel Hempstead, United KingdomHQ recorded Sep 28, 202611-507 contacts →

Exact match

“Amberside Accounting Ltd apply the same rigours required by their Institutional Investor clients to ensure your finance function is best in class for any sized business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchUk, United KingdomHQ recorded Sep 28, 20261-107 contacts →

Exact match

“We strengthen our partners' skills and capabilities to make a greater difference in the world.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-107 contacts →

Exact match

“Social and economic value made simpler.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-107 contacts →

Exact match

“Hi we're Akou.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-106 contacts →

Exact match

“Accountants for business success - startup, growth, challenges and exit”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchGlasgow, United KingdomHQ recorded Sep 28, 20261-106 contacts →

Exact match

“The Social Value Lab provides services that transform how organisations plan, measure, and communicate their social impact- Research & Analysis - Project & Programme Evaluation -…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 137 impact measurement accounting firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 476 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Impact measurement accounting firms based in the United Kingdom at a glance

As of Sep 28, 2026
44.0%Verified-email coverage
7.9Average contacts per company
1-10Median size (employees)
40.9%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
94
11-50
38
51-200
3
501-1,000
1

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 137 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “impact measurement accounting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 476 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Impact measurement accounting firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “impact measurement accounting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many impact measurement accounting firms are there based in the United Kingdom?

RevenueBase identified 137 company matches for impact measurement accounting firms associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Harris & Trotter LLP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most impact measurement accounting firms?

London leads with 56 company records, followed by Liverpool (3) and Aldershot (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 476 professional contacts with verified work emails tracked across these 137 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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 SmartSearch, 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.