Company lists · Data refreshed September 2026
Top 25 Carbon accounting software startups based in the United Kingdom
RevenueBase identified 343 carbon accounting software startups headquartered in the United Kingdom as of September 2026 and tracks 4,960 professional contacts across them, including 2,172 with verified work emails. London is the largest hub.
This list covers carbon accounting software startups 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 27, 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.
The 25 largest carbon accounting software startups based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 658 contacts → | ||||
Indirect evidence “We are passionate about driving sustainable change for our planet.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 427 contacts → | ||||
Indirect evidence “Sedex is a global technology company that specialises in data, insights and professional services to empower supply chain sustainability.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 212 contacts → | ||||
Indirect evidence “ESG Book and EthiFinance have merged!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 192 contacts → | ||||
Partial evidence “Investing in carbon projects is essential to tackling climate change.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 148 contacts → | ||||
Partial evidence “EVORA is an award-winning global sustainability consultancy and software provider supporting real asset investors, owners, and operators.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 123 contacts → | ||||
Indirect evidence “We are a new age technology driven company, providing comprehensive SaaS based ESG (Environmental, Social & Governance) solutions to address end to end sustainability needs of…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 115 contacts → | ||||
Indirect evidence “At ZTP, we’re committed to accelerating the transition to a more sustainable future by reducing the negative impact of human activity on our planet - ecologically, financially…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 109 contacts → | ||||
Indirect evidence “Ecolibrium is a sustainability tech company that empowers people to make better decisions based on proven data-driven ML algorithms through continuous monitoring, analysis and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 88 contacts → | ||||
Indirect evidence “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 83 contacts → | ||||
Indirect evidence “Altruistiq is a leading Sustainability Intelligence platform trusted by companies across the agriculture value chain.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 81 contacts → | ||||
Partial evidence “We enable businesses to succeed in the environmental components of their ESG strategies through comprehensive net zero consulting services and ground-breaking carbon and energy…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 69 contacts → | ||||
Partial evidence “TEAM is the UK’s leading supplier of carbon and energy management solutions committed to driving the efficiency and sustainability of energy consumption and environmental…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 69 contacts → | ||||
Indirect evidence “EcoAct is now SE Advisory Services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 68 contacts → | ||||
Partial evidence “CARBON FIRST ENGINEERING City Science is the first engineering company dedicated to decarbonisation.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 67 contacts → | ||||
Partial evidence “Our mission at The Miles Consultancy (TMC) is to empower businesses with innovative, digital solutions and data-driven insights that reduce costs, lower carbon emissions and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 63 contacts → | ||||
Indirect evidence “Manufacture 2030 provides global corporations with the certainty they need to hit their Scope 3 emissions reduction targets, using our unique platform, to measure, manage and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 63 contacts → | ||||
Partial evidence “Climate Connect Digital (CCD) is a climate-tech company with Digital Monitoring Reporting Verification products in carbon markets.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 61 contacts → | ||||
Strong evidence “We help organisations understand, measure, and meaningfully reduce their environmental impact through a unique combination of expert consultancy, advanced carbon accounting…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 61 contacts → | ||||
Indirect evidence “Lorax EPI is an environmental and sustainability reporting company focussed on supporting businesses who comply with, or commit to, a vast range of global packaging, plastics…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 49 contacts → | ||||
Indirect evidence “The intelligence platform for transforming building performance.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 45 contacts → | ||||
Indirect evidence “Aether provides consultancy in air quality and climate change emissions inventories, forecasting and policy analysis.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 45 contacts → | ||||
Partial evidence “Zevero is a leading carbon management platform that empowers organisations to measure, reduce, and report their carbon emissions with precision and efficiency.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 42 contacts → | ||||
Partial evidence “CarbonChain's platform enables companies to track, report and reduce their supply chain emissions, covering the most carbon-intensive industries (metals and mining, agriculture…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 42 contacts → | ||||
Indirect evidence “KarbonWise is a sustainability solutions company that helps businesses take climate action with confidence and clarity.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 37 contacts → | ||||
Partial evidence “Mobilityways is a B-Corp Certified climate-tech organisation on a mission to make Zero Carbon Commuting a reality.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
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: carbon accounting software startups. 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 carbon accounting software startups.
- Partial evidence
- Its own public description names part of carbon accounting software startups, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name carbon accounting software startups. 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 25 of 343 carbon accounting software startups based in the United Kingdom
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Carbon accounting software startups based in the United Kingdom at a glance
As of Sep 27, 2026Companies by employee count
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 343 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 carbon accounting software startups, 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 “carbon accounting software startups”. 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 carbon accounting software startups), 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 carbon accounting software startups, 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, 2,172 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 27, 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.
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 carbon accounting software startups, 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 carbon accounting software startups are there based in the United Kingdom?
RevenueBase identified 343 carbon accounting software startups 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?
KBC A Yokogawa Company, headquartered in Walton-On-Thames, tops this list with the largest team on record.
Which city has the most carbon accounting software startups?
London leads with 157 headquartered companies, followed by Manchester (13) and Edinburgh (9).
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 2,172 verified decision-maker contacts tracked across these 343 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 27, 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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