Company lists · Data refreshed September 2026

Top 25 Carbon verification companies based in the United Kingdom

RevenueBase identified 100 company matches for carbon verification companies associated with the United Kingdom as of September 2026 and tracks 2,163 professional contacts across them, including 887 with verified work emails. London is the largest hub.

This list covers company matches for carbon verification companies 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 19, 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 19, 2026 How this list was built
100Companies
2,163Contacts tracked
887Verified emails
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The 25 largest carbon verification companies based in the United Kingdom

Ranked by team size
Top 25 of 100 company matches for carbon verification companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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 matchAbingdon, United KingdomHQ recorded Sep 19, 2026501-1,000836 contacts →

Exact match

“For more than 30 years, Achilles has protected organisations’ business interests and reputations by providing unrivalled levels of supply chain transparency, carbon reduction and…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchDunstable, United KingdomHQ recorded Sep 19, 2026501-1,000267 contacts →

Exact match

“NQA is a leading global certification body, respected for providing flexible and supportive certification and training services that are technically advanced and meet the needs of…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchWakefield, United KingdomHQ recorded Sep 19, 2026201-500128 contacts →

Exact match

“Elmhurst Energy and Stroma Certification have merged.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 19, 202651-200100 contacts →

Exact match

“ERM CVS provides science-based, independent assurance, verification certification and training services for the world’s leading organizations.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchEpsom, United KingdomHQ recorded Sep 19, 202651-20061 contacts →

Exact match

“We help organisations understand, measure, and meaningfully reduce their environmental impact through a unique combination of expert consultancy, advanced carbon accounting…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchSheffield, United KingdomHQ recorded Sep 19, 202611-5060 contacts →

Exact match

“The Xpansiv I-REC Registry (previously Evident) is the world's most widely used registry of environmental assets, serving more than organizations in over 140 countries.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchGlasgow, United KingdomHQ recorded Sep 19, 202651-20050 contacts →

Exact match

“International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 19, 202611-5042 contacts →

Exact match

“CarbonChain's platform enables companies to track, report and reduce their supply chain emissions, covering the most carbon-intensive industries (metals and mining, agriculture…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchOxford, United KingdomHQ recorded Sep 19, 202611-5034 contacts →

Exact match

“Based in Oxford, UK and in Istanbul, Turkey, Metsims is the leading sustainability consultancy specialised in life cycle assessment (LCA), corporate and product carbon footprint…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchBristol, United KingdomHQ recorded Sep 19, 202611-5031 contacts →

Exact match

“We believe that if you understand your environmental targets, you will have a better understanding of their real-world impacts.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 19, 202611-5029 contacts →

Exact match

“HAMERKOP IS AN ENABLER - AN INDEPENDENT TECHNICAL CONSULTANCY OPERATING WORLDWIDE.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchJarrow, United KingdomHQ recorded Sep 19, 20261-1021 contacts →

Exact match

“The certification body of choice for the built environment.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 19, 202611-5020 contacts →

Exact match

“This page has closed”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 19, 20261-1018 contacts →

Exact match

“ESGmark® helps organisations credibly demonstrate, measure, and improve their Environmental, Social, and Governance (ESG) performance.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchReading, United KingdomHQ recorded Sep 19, 202611-5015 contacts →

Exact match

“Teamwork IMS is a leading provider of Compliance and Sustainability solutions to a wide range of business sectors worldwide.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchHigh Wycombe, United KingdomHQ recorded Sep 19, 20261-1015 contacts →

Exact match

“Social Responsibility allows you to enrich the quality of lives for all by investing in social value as an essential part of an organisations culture.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchLeeds, United KingdomHQ recorded Sep 19, 20261-1014 contacts →

Exact match

“Carbon.Climate.Certified offer a holistic and pragmatic range of services to the corporate and built environment sector, including environmental assessment and certification…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 19, 202611-5014 contacts →

Exact match

“Glocert International is an emerging leader in the Testing, Inspection and Certification (TIC) industry.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchCartmel, United KingdomHQ recorded Sep 19, 202611-5013 contacts →

Exact match

“MSS Global - UKAS Accredited Certification Body (CB) with specialism in assurance of ethical management practices, environmental-social-governance (ESG) assurance, and management…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchBelfast, United KingdomHQ recorded Sep 19, 202611-5012 contacts →

Exact match

“carbonfit provides your business with a one-stop solution to reduce carbon emissions by centralising energy and carbon data, highlighting hotspots and streamlining mandatory…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 19, 202611-5012 contacts →

Exact match

“We are Carbon Responsible (part of Simply Sustainable): empowering businesses to confidently drive real carbon reduction.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchStoke On Trent, United KingdomHQ recorded Sep 19, 202611-5012 contacts →

Exact match

“Lucideon CICS Limited provides sustainability assurance, management systems certification, product certification and training Assurance Services include third party independent…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchMilton Keynes, United KingdomHQ recorded Sep 19, 202611-5012 contacts →

Exact match

“NCZ is the ultimate carbon management and certification platform, enabling clients to achieve carbon neutrality across all phases of their sustainability program.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchMelton Mowbray, United KingdomHQ recorded Sep 19, 202611-509 contacts →

Exact match

“Established in 2007 by our Senior Assessor Glenn Shewan, a trained Engineer, Ashby Energy Assessors emerged from the recognition of a pressing need for an energy assessment…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 19, 20261-109 contacts →

Exact match

“Futureproof is a one-stop shop for companies and consultants to manage their sustainability.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 100 carbon verification companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 887 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Carbon verification companies based in the United Kingdom at a glance

As of Sep 19, 2026
41.0%Verified-email coverage
21.6Average contacts per company
1-10Median size (employees)
37.0%Largest-city concentration · London
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
58
11-50
29
51-200
7
201-500
1
501-1,000
4

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 100 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 “carbon verification companies” 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 887 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 19, 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.

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 “carbon verification companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many carbon verification companies are there based in the United Kingdom?

RevenueBase identified 100 company matches for carbon verification companies 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?

Achilles Information Limited tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most carbon verification companies?

London leads with 37 company records, followed by Belfast (3) and Cheltenham (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 887 professional contacts with verified work emails tracked across these 100 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 19, 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.