Company lists · Data verified August 2026

Top 25 Carbon accounting firms based in the United Kingdom

Name: Carbon accounting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 744 companies tracked

There are 744 carbon accounting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 16,124 professional contacts across them, including 7,770 with verified work emails and 2,329 with mobile numbers. London is the largest hub.

This list covers carbon accounting 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. Data current as of August 28, 2026.

744Companies

16,124Contacts tracked

7,770Verified emails

2,329Mobile numbers

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The 25 largest carbon accounting firms based in the United Kingdom

Ranked by team size

Top 25 of 744 carbon accounting firms based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	ERM	London	5,001-10,000	9,214	4,560
2	Valpak Limited	Stratford-Upon-Avon	201-500	364	264
3	EIC Partnership	Redditch	51-200	315	56
4	Wardell Armstrong LLP Part Of SLR	Edinburgh	501-1,000	253	131
5	Bezero Carbon	London	51-200	191	137
6	Evora Global	London	51-200	149	120
7	Eunomia Research & Consulting	London	51-200	141	100
8	normative.io	London	51-200	136	70
9	AMBER	Cardiff	51-200	123	87
10	ZTP	London	51-200	116	62
11	Greengage Environmental LTD	Manchester	51-200	92	52
12	AES Sustainability Consultants	Tiverton	51-200	91	70
13	Sustainable Advantage	London	51-200	88	55
14	FLAG	London	51-200	83	42
15	Team Energy Auditing Agency LTD	Milton Keynes	51-200	70	31
16	The Miles Consultancy	Crewe	51-200	67	17
17	Trident Your Partner In Planet-First Energy	Blackpool	51-200	65	49
18	Kinto Join Limited	Epsom	51-200	61	46
19	Action Sustainability	London	51-200	61	44
20	Greengen	London	11-50	59	38
21	Advantage Utilities LTD	London	11-50	49	35
22	A A Garg & CO	London	51-200	49	19
23	WRM	Otley	11-50	47	17
24	Carbonxgen Limited	Sandhurst	11-50	46	33
25	Abatable	London	11-50	44	27

Showing 25 of 744 carbon accounting firms based in the United Kingdom

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Carbon accounting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 278 HQs

2,329Contacts with mobile numbers

33Emails re-verified in last 30 days

Companies by employee count

1-10

535

11-50

160

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Carbon accounting firms by metro

Metro	Companies
Carbon accounting firms in London	278
Carbon accounting firms in Manchester	30
Carbon accounting firms in Bristol	20
Carbon accounting firms in Edinburgh	14
Carbon accounting firms in Exeter	9
Carbon accounting firms in Oxford	9
Carbon accounting firms in Cambridge	9

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “carbon accounting firms”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 33 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 744 carbon accounting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most carbon accounting firms?

London leads with 278 headquartered companies, followed by Manchester (30) and Bristol (20).

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 7,770 verified decision-maker contacts tracked across these 744 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.