Company lists · Data refreshed September 2026

Top 24 Impact measurement consulting firms based in the United Kingdom

Name: Impact measurement consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 629 companies tracked

RevenueBase identified 629 impact measurement consulting firms headquartered in the United Kingdom as of September 2026 and tracks 3,473 professional contacts across them, including 1,271 with verified work emails and 290 with mobile numbers. London is the largest hub.

This list covers impact measurement consulting firms headquartered in the 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 3, 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 3, 2026 86% judged on-target in blind review

629Companies

3,473Contacts tracked

1,271Verified emails

290Mobile numbers

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The 24 largest impact measurement consulting firms based in the United Kingdom

Ranked by team size

Top 24 of 629 impact measurement consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to impact measurement 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	The Smarty Train	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	84 contacts →
	Partial evidence “From employability and strategy formulation through to training programme design and delivery, we have been the engine behind award-winning and high-impact workplace initiatives…” Source: RevenueBase Database · checked Sep 3, 2026
2	180 Degrees Consulting Bath	Partial evidence	Bath, United KingdomHQ checked Sep 3, 2026	51-200	71 contacts →
	Partial evidence “180 Degrees Consulting is the world's largest consultancy for non-profits and social enterprises.” Source: RevenueBase Database · checked Sep 3, 2026
3	Montrose	Indirect evidence	Jersey, United KingdomHQ checked Sep 3, 2026	51-200	70 contacts →
	Indirect evidence “Montrose is an international development consultancy and project management company providing services to bilateral and multi-lateral development agencies, non-governmental…” Source: RevenueBase Database · checked Sep 3, 2026
4	Eastside People	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	59 contacts →
	Partial evidence “Eastside People is a community of experienced professionals focused on helping charity, not-for-profit and social enterprise leaders to build the capacity and impact of their…” Source: RevenueBase Database · checked Sep 3, 2026
5	IOD Parc	Partial evidence	Sheffield, United KingdomHQ checked Sep 3, 2026	11-50	56 contacts →
	Partial evidence “Incorporated in 1998 in the United Kingdom, IOD PARC is a private consulting company and a leading, global specialist-provider in results-based performance assessment in…” Source: RevenueBase Database · checked Sep 3, 2026
6	BRINK	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	55 contacts →
	Partial evidence “Brink is a behavioral science and innovation consultancy focused on social impact and international development across Africa and globally.” Source: RevenueBase Database · checked Sep 3, 2026
7	TH NK	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	n/a	42 contacts →
	Indirect evidence “You can now find us over at EPAM Continuum.” Source: RevenueBase Database · checked Sep 3, 2026
8	GC Insight	Partial evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	40 contacts →
	Partial evidence “PURPOSE-DRIVEN RESEARCH & ADVICE SERVICES We are a social enterprise, committed to generating social value impacts and helping our clients have a more positive impact on place…” Source: RevenueBase Database · checked Sep 3, 2026
9	Brodie	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	39 contacts →
	Partial evidence “We are here to drive three significant changes: CHANGE CORPORATE IMPACT: help business to reframe and re-orient its role in society CHANGE CONSUMPTION: help brands re-wire for the…” Source: RevenueBase Database · checked Sep 3, 2026
10	Substance	Indirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	34 contacts →
	Indirect evidence “Founded in Manchester, 2005.” Source: RevenueBase Database · checked Sep 3, 2026
11	Renaisi	Partial evidence	Of, United KingdomHQ checked Sep 3, 2026	11-50	32 contacts →
	Partial evidence “We are Renaisi, a social impact consultancy helping people and places to thrive.” Source: RevenueBase Database · checked Sep 3, 2026
12	The Good Economy Partnership Limited	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	31 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
13	180 Degrees Consulting Imperial	Partial evidence	South Kensington, United KingdomHQ checked Sep 3, 2026	11-50	31 contacts →
	Partial evidence “With more than students all over the world and branches at over 100 leading universities, 180 Degrees Consulting is the world’s largest university-based consultancy and the…” Source: RevenueBase Database · checked Sep 3, 2026
14	Kaleidoscope Health And Care	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	30 contacts →
	Indirect evidence “Kaleidoscope is an award-winning social enterprise consultancy.” Source: RevenueBase Database · checked Sep 3, 2026
15	Mh&a	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	29 contacts →
	Indirect evidence “MH & A was founded in 2018 by Professor Matt Hamnett, who has worked at senior levels in central Government, corporate and social sector organisations.” Source: RevenueBase Database · checked Sep 3, 2026
16	Innovation Consulting & Solutions	Indirect evidence	Birmingham, United KingdomHQ checked Sep 3, 2026	11-50	27 contacts →
	Indirect evidence “ICS is a leading international development consultancy providing humanitarian leadership and analytics capacities combined with technology-driven solutions for the humanitarian…” Source: RevenueBase Database · checked Sep 3, 2026
17	Positive Luxury	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	25 contacts →
	Indirect evidence “Positive Luxury are the leading sustainability experts for the global luxury industry, offering all of the industry’s sustainability needs under one roof.” Source: RevenueBase Database · checked Sep 3, 2026
18	Centre For Strategy & Evaluation Services Cses	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	25 contacts →
	Indirect evidence “The Centre for Strategy & Evaluation Services (CSES) was established in CSES offers multi-disciplinary research and consultancy services and specialises in the following: •…” Source: RevenueBase Database · checked Sep 3, 2026
19	MIME	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	23 contacts →
	Indirect evidence “Mime is expert at turning data into useful and engaging insights.” Source: RevenueBase Database · checked Sep 3, 2026
20	Good Innovation	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	22 contacts →
	Indirect evidence “We help charities transform their income and services.” Source: RevenueBase Database · checked Sep 3, 2026
21	Trust Impact	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	22 contacts →
	Partial evidence “It’s never been more important for organisations to explore, align, amplify and communicate the positive impact you’re having.” Source: RevenueBase Database · checked Sep 3, 2026
22	Chord Consult	Indirect evidence	Nottingham, United KingdomHQ checked Sep 3, 2026	1-10	22 contacts →
	Indirect evidence “Chord Consult is an M&E consultancy founded in June 2022.” Source: RevenueBase Database · checked Sep 3, 2026
23	C21	Indirect evidence	Altrincham, United KingdomHQ checked Sep 3, 2026	11-50	20 contacts →
	Indirect evidence “Our purpose is to create change for good.” Source: RevenueBase Database · checked Sep 3, 2026
24	Greenheart	Indirect evidence	Uk-wide, United KingdomHQ checked Sep 3, 2026	11-50	20 contacts →
	Indirect evidence “Sustainability is not enough!” Source: RevenueBase Database · checked Sep 3, 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: impact measurement 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 impact measurement consulting firms.
Partial evidence: Its own public description names part of impact measurement consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name impact measurement 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 24 of 629 impact measurement consulting firms based in the United Kingdom

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

As of Sep 3, 2026

36.6%Verified-email coverage

8.4%Mobile-number coverage

5.5Average contacts per company

1-10Median size (employees)

48.5%Largest-city concentration · London

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

513

11-50

51-200

201-500

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

9731–60

72161–90

44890–180

5180+

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 impact measurement 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 the United Kingdom whose own description of what they do matches “impact measurement 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 impact measurement 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 impact measurement consulting firms, and records with no verified work email. Companies headquartered outside United Kingdom 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, 1,271 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 3, 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.

Impact measurement consulting firms by metro

Impact measurement consulting firms in London305

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 impact measurement 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 impact measurement consulting firms are there based in the United Kingdom?

RevenueBase identified 629 impact measurement consulting firms headquartered in the 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?

The Smarty Train, headquartered in London, tops this list with the largest team on record.

Which city has the most impact measurement consulting firms?

London leads with 305 headquartered companies, followed by Bristol (15) and Manchester (14).

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 1,271 verified decision-maker contacts tracked across these 629 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 3, 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.