Organisational
A company’s emissions for a reporting period, by Scope 1, 2 and 3, inside a boundary set by its consolidation approach.
GHG Protocol Corporate Standard; ISO 14064-1. What SECR, UK SRS S2 and PPN 006 draw on.Software · carbon footprint, cited
Carbon footprint software: which footprint, which tool
Carbon footprint software measures greenhouse gas emissions, but “footprint” names two different measurements: an organisation’s inventory and a product’s life-cycle footprint.
This page sets out which standard governs each, which software does which, when a free calculator will do, the UK factors that go in and the claims that can come out, with 65 vendors in their own words; this site has tested no products and ranks none.
Two footprints, one word
An organisation’s footprint or a product’s
Carbon footprint software measures greenhouse gas emissions and states them as carbon dioxide equivalent.
The phrase covers two different measurements, and a tool built for one does not automatically do the other.
An organisational footprint is a company’s emissions for a period, organised by scope under the GHG Protocol Corporate Standard or ISO 14064-1.
A product footprint is the emissions of one unit of a product over its life cycle, quantified under ISO 14067 or the GHG Protocol’s Product Standard.
The GHG Protocol draws the line itself: its Scope 3 Standard “accounts for emissions at the corporate level, while the Product Standard accounts for emissions at the individual product level”.
Most UK reporting duties ask for the organisational footprint, so most buyers searching for carbon footprint software need that one first.
Carbon
footprint
footprint
Product
The emissions of one unit of a product across its life cycle, from raw materials through use to disposal.
ISO 14067; GHG Protocol Product Standard. What a customer asking for a product figure wants.The organisational footprint
GHG Protocol and ISO 14064-1: the standards an inventory tool implements
An organisational footprint is built to the GHG Protocol Corporate Standard, which makes Scope 1 and 2 the required minimum, with the Scope 3 Standard for the value chain.
ISO 14064-1:2018 specifies organisation-level quantification and reporting too, and calls itself programme-neutral: where a programme applies, its requirements are additional.
ISO lists the 2018 edition at stage 90.92, “to be revised”, with ISO/WD 14064-1.2 under development.
Read the detailed guidance and references
Every figure in the inventory inherits the consolidation approach — equity share, financial control or operational control — so a tool must hold the group as it really is, not as a flat list of sites.
The Scope 3 Standard asks a company to account for all Scope 3 emissions and to disclose and justify any exclusion, under §6.2.
Some verifiers check an inventory against ISO 14064-1 rather than, or as well as, the GHG Protocol, so ask which standard each report is built to.
The two families are converging: on 29 July 2026 the GHG Protocol set out a plan with ISO for a single co-branded corporate standard, with a consultation draft estimated for Q2 2027 and publication estimated for Q4 2028, in its Standard Development Plan.
How the scopes divide, and who counts as controlling a source, is on Scope 1, 2 and 3 emissions.
The software that builds this inventory, test by test, is covered on carbon accounting software.
An organisation’s footprintExplore
Module 01 / 04
Boundary
Entities and operations in, under a stated consolidation approach.
Module 02 / 04
Scopes 1 and 2
Owned sources and purchased energy — the required minimum.
Module 03 / 04
Scope 3
Fifteen value-chain categories, exclusions disclosed and justified.
The product footprint
ISO 14067 and the Product Standard: one unit, a whole life cycle
A product footprint follows one unit of a product through its life cycle rather than one company through a year.
The GHG Protocol’s Product Standard covers “raw materials, manufacturing, transportation, storage, use and disposal”.
ISO 14067:2018 quantifies the carbon footprint of a product “in a manner consistent with” the life cycle standards ISO 14040 and ISO 14044.
ISO 14067 covers climate change only, and places carbon offsetting and the communication of a footprint outside its scope.
Read the detailed guidance and references
ISO lists ISO 14067:2018 at stage 90.92, “to be revised”, with ISO/WD 14067.2 at working-draft stage; ISO states no date for the successor, and none is given here.
On 9 February 2026 the GHG Protocol named its members of a joint working group with ISO to develop “an updated and harmonized product-level GHG accounting standard”.
The Product Standard says its main benefit for now is finding hot spots in a life cycle, and that comparing products needs product rules for the category.
A full life cycle assessment covers more impact categories than carbon, under ISO 14040 and ISO 14044; the standards are set out on life cycle assessment and product standards.
The picker beside this names the standard for the product question you are answering.
What are you trying to produce?
Use: ISO 14067:2018; or PAS 2050:2011 from BSI; or the GHG Protocol Product Life Cycle Standard. Each covers one impact category, global warming.
Status: ISO 14067:2018 is current but at stage 90.92, “to be revised”, with ISO/WD 14067.2 at working-draft stage and no date. GHG Protocol and ISO formed a joint working group in February 2026 on a harmonised product standard.
What it does not do: ISO 14067 puts carbon offsetting and communication of the footprint outside its scope; PAS 2050 sets no disclosure requirements.
ISO record 71206 — Bible [417]; BSI Knowledge, PAS 2050:2011; GHG Protocol Product Standard page
From each standard’s public catalogue record; ISO clause text is paywalled and is not quoted.
Nothing is stored or sent.
- 1
Raw materials
Extraction and processing of the inputs, often from suppliers’ data.
- 2
Manufacturing
The energy and process emissions of making the product.
- 3
Transport and storage
Moving and holding the product between stages.
- 4
Use
Emissions while the product is used, where the boundary includes it.
- 5
End of life
Disposal, recycling or recovery.
Which software does which
60 filed for organisations, 29 for products
This site files each vendor by what its own pages say it does, and the split answers the first question a buyer should ask.
Of the 65 vendors in this guide’s directory, 60 are filed for organisational carbon accounting and 29 for life cycle and product footprints; 24 are filed for both.
5 are filed for product work and not for organisational accounting: Climatiq, Deepki, Ecochain, EcoVadis, One Click LCA.
30 say something on their own pages about product footprints or life cycle assessment, recorded in the registry with the page it was read on.
Read the detailed guidance and references
A filing is a statement about what a vendor says, read 11 October 2026 and 30 September–1 October 2026, and not a finding that the capability works.
A vendor filed for both may sell the product footprint as a separate module, priced and contracted separately, so ask.
A product footprint usually needs supplier data and a bill of materials; an organisational footprint usually starts from energy bills, fuel and spend, so the integrations that matter differ.
The claims each vendor makes, regime by regime, are tabulated on carbon reporting software.
| What you need | Standard | Look in the directory for |
|---|---|---|
| A company footprint for SECR, UK SRS S2 or a customer questionnaire | GHG Protocol Corporate Standard; ISO 14064-1 | Carbon accounting |
| A product footprint for a customer or a label | ISO 14067; GHG Protocol Product Standard | LCA and product footprint |
| A first Scope 1 and 2 footprint for a small business | GHG Protocol Corporate Standard | SMEs |
| A full environmental life cycle assessment | ISO 14040 and ISO 14044 | LCA and product footprint |
Organisational carbon accounting
60vendors filed under carbon accountingProduct and life cycle
29vendors filed under LCA and product footprintFiled under both
24an organisational and a product capabilityProduct only
5not filed for organisational accountingFree calculators, spreadsheets and platforms
When a calculator will do, and when it stops
A carbon footprint calculator for business turns activity into CO2e: kilowatt-hours, litres and miles in, tonnes out.
The government’s conversion factors are free, and a spreadsheet with a written method can carry a first single-site Scope 1 and 2 footprint.
Among the vendors in this guide, 3 publish a free tier or plan on their own pages (Measurabl, Persefoni, Small99), and 13 say they serve small or mid-sized businesses.
A calculator stops coping when three things arrive together: a factor year that must not overwrite the last, a change history someone outside the team will read, and Scope 3 built on suppliers’ data.
Read the detailed guidance and references
A carbon footprint tool usually means the calculator; a platform adds data connections, a versioned factor library, an entity model, permissions and an audit trail.
A free tier often carries paid reports or modules on top, so read what the free plan produces before relying on it for a disclosure.
Ask which factor set each line used, because DESNZ publishes one per activity year and a calculator that applies one set to every year cannot reproduce last year’s figure.
If the first footprint needs doing for you, the route is covered on carbon footprint consultancy, and the tool beside this shows where a spreadsheet stops paying.
Platform against the way you work now
Current process £0 a year · quote £0 a year
Fill in all three to see the break-even hours.
Arithmetic on your own inputs.
The quote’s implementation, uplift and exit terms are in the three-year worksheet on the carbon reporting software page.
Nothing is stored or sent.
The UK factors
DESNZ 2026: one set per activity year
For UK activity, the emission factors in most carbon footprint software are the government’s, published once a year by DESNZ; the 2026 set was published on 11 June 2026.
¶1.10 of the 2026 methodology paper says the 2026 factors are for activity data falling entirely or mostly within 2026.
So a footprint for the 2026 financial year, prepared in 2027, uses the 2026 set, and a tool must keep every year’s set rather than overwrite it.
In the 2026 set, UK electricity generated is 0.13096 kgCO2e per kWh, transmission and distribution losses add 0.01299, and electricity consumed, including losses, is 0.14396, from Table 9 of the paper.
The electricity factor fell about 26% from 2025, mostly grid decarbonisation in DESNZ’s account, with 6 to 7 percentage points from a methodology change set out in the major changes report.
Read the detailed guidance and references
A company that used 100,000 kWh of UK grid electricity in 2026 has a location-based Scope 2 figure of 13,096 kgCO2e on the generated factor.
Its grid losses, 1,299 kgCO2e, are Scope 3; the consumed factor, 0.14396, gives 14,396 kgCO2e including losses.
The two parts add up to 14,395 kg because the published factors are rounded; the consumed figure is the table’s own, and a tool should say which it used.
DESNZ says at ¶1.6 that its factors differ from Defra’s spend-based multipliers, published with the UK and England carbon footprint statistics, which can give an initial assessment of supply-chain emissions where activity data is missing.
DESNZ describes its factors as relevant to SECR reporting and adds that other uses are at the user’s own risk.
How the sets work, year by year, is on GHG conversion factors.
| UK electricity, kgCO2e per kWh | 2025 set (data year 2023) | 2026 set (data year 2025) |
|---|---|---|
| Generated | 0.17700 | 0.13096 |
| Transmission and distribution losses | 0.01853 | 0.01299 |
| Consumed (includes losses) | 0.19553 | 0.14396 |
Same kWh, two factor sets
2025 factor set · 0.17700 kgCO2e/kWh17.7 tCO2e
2026 factor set · 0.13096 kgCO2e/kWh13.1 tCO2e
A company that changed nothing sees 26.0% less on this line because the factor moved.
DESNZ attributes most of the fall to grid decarbonisation and 6 to 7 percentage points to methodology.
Factors: DESNZ 2026 methodology paper, Table 9 · 2026 major changes report.
Generated electricity is Scope 2; transmission and distribution losses are Scope 3. With losses selected, the illustration uses the printed consumed total in DESNZ Table 9, spanning both scopes. It is not your SECR figure; nothing is stored or sent.
Inside the organisational footprint
Scope 1 and 2 first, Scope 3 where the data is weakest
An organisational footprint starts with Scope 1, the sources a company owns or controls, and Scope 2, the energy it buys.
UK SRS S2 requires location-based Scope 2, and the GHG Protocol’s Scope 2 Guidance asks for both location-based and market-based figures where contractual instruments exist.
Scope 3 covers fifteen value-chain categories, and UK SRS S2 asks an entity to consider all fifteen and disclose which it includes.
Read the detailed guidance and references
Refrigerant top-ups are the Scope 1 line most often missing from a first footprint, because the data sits with a maintenance contractor rather than on an energy bill.
Scope 3 usually starts spend-based, from the ledger, and moves category by category to supplier data, so the software should record the method per category.
Purchased goods and services, category 1, is where an organisational footprint and suppliers’ product footprints meet: a supplier’s product figure can replace a spend-based estimate.
Scope 3 as a subject is on Scope 3 emissions.
Scope 1
Owned sourcesFuel burnt on site, owned vehicles, refrigerant lossesScope 2
Purchased energyLocation-based required by UK SRS S2Scope 3
15 categoriesConsider all; disclose those included (UK SRS S2 ¶B32)PPN 006
5 namedCategories 4, 5, 6, 7 and 9, with Scope 1 and 2What UK duties ask for
SECR, UK SRS S2 and PPN 006 all ask for the organisation’s footprint
The UK’s reporting duties draw on an organisation’s footprint, which is why carbon footprint reporting software is mostly organisational software.
SECR, under Schedule 7 of SI 2008/410, applies to quoted companies and to large unquoted companies and LLPs; a company is large when it exceeds two of £36m turnover, £18m balance sheet and 250 employees.
Listed companies in UKLR 6, 14, 15, 16 and 22 report against UK SRS on a comply-or-explain basis for periods beginning on or after 1 January 2027, under the FCA’s PS26/19; UK SRS remains voluntary for everyone else.
Read the detailed guidance and references
SECR’s size test is framed as “not more than” qualifying conditions on the exempt side, judged over two consecutive years after the first, as set out on SECR reporting requirements.
DBT published UK SRS S1 and S2 on 25 February 2026 for voluntary use; nothing in the FCA’s rules makes them mandatory.
PPN 006 is procurement policy for in-scope central government contracts, not a legal duty on a company; its Technical Standard names Scope 1 and 2 and five Scope 3 categories, covered on the PPN 006 carbon reduction plan.
A product footprint usually arrives through a customer’s questionnaire rather than a statute, so buy for it only when a customer is asking.
What each duty requires a platform to output, provision by provision, is on carbon reporting software.
One footprint, several outputsExplore
Module 01 / 04
SECR
Energy, emissions, an intensity ratio, the method and comparatives.
Module 02 / 04
UK SRS S2
Gross Scope 1, 2 and 3; location-based Scope 2; categories included.
Module 03 / 04
PPN 006
Scope 1 and 2 and five named Scope 3 categories in a Carbon Reduction Plan.
Module 04 / 04
Customers
Supplier questionnaires, sometimes asking for a product figure.
From footprint to claim
Carbon neutral claims: PAS 2060 is gone, ISO 14068 is changing
A footprint is a measurement; a carbon neutrality claim is a statement about reductions and offsetting, made against a standard and governed by advertising law.
Software can produce the first; it cannot by itself support the second.
- November 202301
ISO 14068-1:2023 published
The ISO carbon neutrality standard that the market migrated to from PAS 2060. - 31 December 202502
PAS 2060 migration deadline
UKAS’s migration deadline, with PAS 2060 removed from its schedule; PAS 2060 was withdrawn by BSI at the end of 2025. - 11 September 202603
ISO 14068-1:2023 withdrawn
ISO’s catalogue records the withdrawal, stage 95.99, and names ISO 14068:2026 as the revision. - September 202604
ISO 14068:2026 — Carbon neutrality
The successor has no part number; ISO gives its publication date only as 2026-09, and its own record still read “under publication” when checked.
ISO 14068-1:2023 was withdrawn on 11 September 2026 and is being replaced by ISO 14068:2026 (Carbon neutrality), which sets requirements for carbon neutrality “through the quantification, reduction and offsetting of the carbon footprint”.
It applies to organisations and products, puts reductions within the value chain ahead of offsetting, and ISO itself certifies nobody; the detail is on PAS 2060 and ISO 14068.
Read the detailed guidance and references
A PAS 2060 opinion issued for a past period remains valid for that period; it is not a current credential, and nobody can be assessed against PAS 2060 today.
In the UK, offset-based carbon-neutral claims remain lawful; they are actionable only if misleading, under Part 4 of the Digital Markets, Competition and Consumers Act 2024, and the ASA’s settled position is that an unqualified one is.
Section 11 of the CAP Code says unqualified environmental claims could mislead if they omit material information, and absolute claims need a high level of substantiation.
The CMA’s Green Claims Code asks that claims consider the full life cycle, which is where a product footprint, not an organisational one, becomes the evidence.
For software, the practical test is whether a product keeps the footprint, the reductions and any offsets apart, so a claim can show each part.
The vendors
65 carbon footprint software companies, in their own words
Every vendor this site files under carbon accounting, life cycle and product footprint, or small-business tools, alphabetically, which ranks nothing, each linked to its own site and its profile here.
The directory covers 73 vendors across all categories; the filter narrows this guide’s 65.
65 vendors · carbon accounting, lca and product footprint, smes
“Altruistiq helps companies with complex value chains go faster and further on sustainability”
“Intelligent AI that measures, reduces, and reports Scope 1–3 and LCA emissions in line with CDP, SBTi, CSRD, and CBAM requirements”
“Benchmark Gensuite is a unified EHS management software platform built on a single architecture—connecting safety, environmental compliance, and operational risk across every site”
“Our software provides companies and financial institutions with precise accounting of the emissions caused by making, shipping and using critical commodities and products around the globe”
“Climatiq delivers the reliable data, easy-to-use tools, and deep integrations businesses need to understand their carbon impact”
“Measure, reduce, and report your Scope 1, 2 and 3 emissions”
“The professional benchmarking and reporting platform built for sustainability consultants, SMEs, and the platforms that serve them”
“Coolset gives supply chain and ESG teams the structure, automation and guidance to meet complex compliance requirements like EUDR, PPWR and CSRD, and manage Scope 1-3 emissions”
“One AI-enabled EHS software platform to drive performance across employee health, safety, quality, environmental, and sustainability”
“Cozero helps enterprises steer decarbonization with the same rigor as financial performance, from data collection to investment decisions and regulatory disclosure”
“Dcycle is an ESG software platform founded in 2020 that helps companies collect, manage, and govern sustainability and non-financial data”
“Deepki centralizes your sustainability data, strategy and operations in one place so you can act on carbon, climate risk, and finance”
Diginex describes carbon accounting, sustainability reporting, supply chain, human rights monitoring and ESG investor intelligence for asset managers, banks and companies.
Diligent’s carbon accounting page describes a solution that “automatically collates your data and produces up to 80 different pre-configured audit-ready reports”.
“Ecochain is an LCA automation software company with one purpose: to make LCAs accessible for manufacturers”
Ecologi describes itself as a B Corp-certified climate action platform.
EcoOnline sells software to manage EHS and compliance.
“A connected system built on a global standard for measuring and understanding sustainability performance across supply chains”
“The Emitwise platform is now part of Green Project, where the team continues to build and deliver end-to-end decarbonization solutions”
“Enablon is Wolters Kluwer’s integrated software platform for environment, health and safety, PSM, and enterprise oversight, with ESG capabilities embedded as part of a broader risk approach”
“Collect, analyze, and report sustainability, financial, and risk KPIs with 10+ software modules – individually or in line with official standards”
“Manage safety, compliance, ESG, sustainability and operational risk from a platform built to keep programs reliable across sites, teams and operational change”
“The climate management platform built on AI, backed by dedicated sustainability experts”
“Measure, report, and reduce your company's emissions on one audit-ready sustainability management platform”
IBM describes Envizi as a “compliance ready solution for ESG data”.
“Ideagen Carbon Accounting is an AI-powered solution designed to address complex multi-region ESG reporting challenges in carbon accounting”
“Bring safety, environment, and quality workflows into one connected platform”
IsoMetrix sells software to “manage their environmental, health, safety, sustainability, and social risks”.
“Makersite’s Product Lifecycle Intelligence software brings together your cost, environment, compliance, and risk data in one place”
“Manglai is a platform to manage all of your environmental impact”
“Measurabl makes subjective sustainability data objective”
Microsoft Sustainability Manager
“Track and reduce your environmental impact using data and AI”
A carbon management platform that, in Novisto’s words, “simplifies the collection, calculation, and reporting of corporate carbon footprints”.
“Net Zero Now exists to provide a simple, credible and affordable route to Net Zero for SMEs and to celebrate and promote those that achieve this vitally important goal”
“Normative is a carbon accounting platform that helps companies calculate, report, and reduce Scope 1, 2, and 3 emissions using 349,000 verified emission factors”
“Novata is a sustainability data management platform built for private market investors, deal teams, banks, and companies that need a scalable way to collect, manage, and act on sustainability data”
“One digital solution for sustainability planning, data management, reporting, analysis and action - built for enterprise”
One Click LCA describes automated life cycle assessment (LCA) and environmental product declarations (EPDs) “across the construction value chain”.
“Our platform empowers organizations to accurately measure and manage scope 1, 2, and 3 emissions with direct and actionable information”
Oracle Fusion Cloud Sustainability
“Oracle Fusion Cloud Sustainability is a new offering to capture environmental, social, and governance data for any kind of activity that has a sustainability impact”
“osapiens is the AI platform for compliance and supplier intelligence to help companies manage risk and become more resilient”
Persefoni describes software and AI tools to manage an organisation’s “sustainability data, disclosures, and performance”.
“Your certified software for reliable emissions intelligence to measure, report and reduce your carbon footprint”
“We guide businesses in understanding their emissions, empower them to develop carbon reduction plans, and supporting them on their journey to net zero”
Position Green describes “a sustainability reporting and management platform that combines powerful software with expert advisory services”.
“Pulsora is an AI-powered sustainability and carbon management platform that automates data collection, measurement, and reporting workflows for sustainability teams”
“Digitally handle occupational safety, quality, sustainability, and environmental management”
“It leverages the full power of the Salesforce ecosystem by pulling an organization’s sustainability data into one place and creating actionable insights to guide strategic decisions”
“Measure your full carbon footprint, build your net zero strategy and develop in-house expertise with a single partner”
SAP Sustainability Footprint Management
“Decarbonize your value chain and calculate your corporate and product carbon footprint at scale with ERP-centric, AI-enabled carbon management”
“Seedling is an all-in-one carbon accounting and Net Zero planning platform for businesses of up to 2000 FTEs”
ServiceNow Operational Sustainability Management
“ServiceNow Operational Sustainability Management helps organizations manage, visualize, and report on sustainability efforts and risks across environmental, social, and governance (ESG) programs”
“SimaPro is life cycle assessment software that helps organizations measure, analyze, and reduce environmental impacts using robust datasets, scientific methods, and transparent modeling”
SINAI describes “audit-grade Scope 1–3 accounting, automated compliance reporting, complete supply chain visibility” and decarbonisation planning for global enterprises.
“Small99 Hero creates a pathway to net zero for you based on your industry, outlining how long your Net Zero journey will take and how much it will cost”
“Sphera unifies risk, safety and sustainability into a single enterprise-wide view — connecting intelligence across operations, products and supply chains”
“Sweep's AI turns sustainability data into measurable business performance”
“Manage sustainability metrics intelligently in medium-sized businesses - through automated processes, AI-powered carbon accounting, and audit-proof ESG reports”
“Terrascope is an enterprise carbon management and decarbonisation platform for companies with complex supply chains”
“Trace combines AI-powered software with expert advisory support to help organisations meet their mandatory climate and sustainability reporting obligations, efficiently and with confidence”
“Unravel Carbon is the climate platform helping companies with global supply chains make data-driven decisions”
“Carbon accounting is often the first step companies take toward climate disclosure, compliance, and action—and with Watershed, it’s part of your complete enterprise sustainability platform”
Workday (supplier sustainability)
“Turn sustainable sourcing into a competitive advantage with Workday supplier sustainability solutions”
“Workiva Carbon is an end-to-end carbon accounting software solution that enables organizations to measure, manage, collaborate on, and report emissions data”
“Carbon management software with experts built in, so you can move from measurement to action without spreadsheets or one-off consulting projects”
Alphabetical, which ranks nothing. Each description is the vendor’s own words from its own site, read 11 October 2026 and 30 September–1 October 2026; prices appear only where the vendor publishes one. No product here has been tested by this site.
Among them, Climatiq is filed for its API, One Click LCA for life cycle work across the construction value chain, and Small99 for small businesses, with a free starting tier; the profiles record what each says, who owns it and what its pages claim.
The market has consolidated: since February 2025 the owners’ own announcements record 11 ownership changes touching vendors in this guide, set out on carbon accounting software, so check who you would be contracting with.
Pricing
What vendors publish, and what they do not
Most carbon footprint software vendors do not publish a price.
Of the 65 in this guide, 8 publish a figure on their own pages (Climatiq, Compare Your Footprint, Ecochain, Ecologi, Microsoft Sustainability Manager, Novata, Salesforce Net Zero Cloud, Zevero), and 3 publish a free tier or plan.
Each figure appears in the directory as the vendor states it, read 11 October 2026 and 30 September–1 October 2026, and none is this site’s estimate.
Read the detailed guidance and references
For a vendor without a published price, ask for a written three-year cost: implementation, added sites or entities, products footprinted, supplier volumes, the annual uplift and the cost of exit.
Where a vendor sells organisational and product footprints, ask whether they are priced and contracted as one product or two.
Verification, where a company commissions it, is a separate cost from the software.
Publish a figure
8on their own pagesPublish a free tier or plan
3often with paid modulesEnterprise level · TBD
54no price publishedThe tests before you sign
Seven questions, each tied to its source
Run each test on your own data, because a demonstration dataset is built to look finished and yours is not.
Tick the questions that match the footprint you need and copy the list into your request to every vendor.
A blank answer is not a yes, and the same list sent to each vendor is the only fair comparison.
Read the detailed guidance and references
The factor test comes from ¶1.10 of the DESNZ methodology paper; the Scope 3 test from §6.2 of the Scope 3 Standard; the restatement and export tests from the principles of the Corporate Standard.
The standard-by-standard checks a GHG platform should pass are on GHG reporting software.
Demo questions · tick the ones you need
The pass tests are our reading of the cited provisions.
Nothing you tick is stored or sent.
Choosing without a ranking
“Best” is a question about your footprint, not a product
There is no best carbon footprint software in general, and a list that names one has chosen the criteria that produce its answer.
The useful question is which product measures the footprint you need, to the standard it needs, and shows its working on your data.
Many comparisons that rank for these searches are published by a vendor that appears in its own table; read who wrote a list before you read its order.
ESG reporting software is a wider purchase again, and carbon is only one part of it.
- 1
Name the footprint
Organisation, product or both, from the duty or the customer asking.
- 2
Name the standard
GHG Protocol or ISO 14064-1 for the organisation; ISO 14067 or the Product Standard for a product.
- 3
Name the outputs
SECR, UK SRS S2, PPN 006, a questionnaire, a product figure.
- 4
Test on your data
Factor year, Scope 2 method, Scope 3 method, restatement, export.
- 5
Check the owner and the exit
Who you contract with, and what leaves with you.
The standards are changing
Corporate and product standards are both being rewritten with ISO
A platform bought now is likely to face a method change on both sides of the footprint.
That makes restatement — keeping the original figure beside the revised one — the capability to test hardest.
- 9 February 202601
Joint product working group
The GHG Protocol names its members of a joint working group with ISO on a harmonised product-level standard. - 29 July 202602
Corporate consolidation plan
GHG Protocol and ISO align around a single co-branded corporate standard. - Estimated Q2 202703
Consolidated corporate draft for consultation
A planning estimate in the Standard Development Plan, subject to change. - Estimated Q4 202804
ISO 14064-1:2018 and ISO 14067:2018 are both at stage 90.92, “to be revised”, with working drafts under development; ISO states no date for either successor.
Nothing changes today, and a footprint built to the current standards stays valid; the question for a buyer is whether a tool can restate when the method moves.
Software or a consultant
Who builds the first footprint
Many organisations build their own footprint in software, particularly for Scope 1 and 2.
A consultant earns a fee where the boundary covers several entities, Scope 3 categories are material and hard to measure, a product footprint must follow product rules, or the figures will be verified.
Software keeps the data from year to year; a consultant’s spreadsheet often does not, so ask who will hold the working once the engagement ends.
The consultancy route, and what to ask for, is on carbon footprint consultant, and the discipline underneath on carbon accounting.
This site has tested no products
Nothing on this page is a rating, ranking or recommendation of any product or firm.
The vendor directory quotes each vendor’s own words, dated, and every count on this page is computed from it.
Frequently asked
Carbon footprint software, answered
What is carbon footprint software?
Software that measures greenhouse gas emissions and states them in CO2e.
Most of it measures an organisation’s footprint — Scope 1, 2 and 3 under the GHG Protocol Corporate Standard or ISO 14064-1 — and some measures a product’s footprint over its life cycle under ISO 14067 or the GHG Protocol Product Standard.
Ask which footprint a product is built for before anything else.
What is the difference between an organisational and a product carbon footprint?
An organisational footprint is a company’s emissions for a period, organised by scope, inside a boundary set by its consolidation approach.
A product footprint is the emissions of one unit of a product across its life cycle, from raw materials to disposal.
The GHG Protocol puts it plainly: the Scope 3 Standard accounts at the corporate level and the Product Standard at the level of the individual product.
What is the best carbon footprint software in the UK?
This site ranks no products and has tested none, so it names no best.
The useful test is which product handles the footprint you actually need — organisational or product — with the DESNZ factor set matched to the activity year, the Scope 3 method recorded by category, restatement that keeps the original, and an export you could rebuild elsewhere, shown on your own data.
Is there a free carbon footprint calculator for business?
Yes, in two senses.
The DESNZ conversion factors are free to download, and a spreadsheet with a written method can carry a first single-site Scope 1 and 2 footprint.
Among the vendors this site files under carbon footprinting, 3 publish a free tier or plan on their own pages (Measurabl, Persefoni, Small99).
A free calculator gives a figure; check whether it keeps the factor year and the working behind it.
Is carbon footprint reporting software the same as carbon accounting software?
Mostly the same products, described by a different step.
Carbon accounting is the measurement — activity data, factors, scopes.
Carbon footprint reporting is the output — the SECR lines, the UK SRS S2 metrics, a customer’s supplier questionnaire.
A product that formats well but measures badly gives the right shape around the wrong number.
Which standards should carbon footprint software follow?
For an organisation, the GHG Protocol Corporate Standard with the Scope 3 Standard, or ISO 14064-1:2018, which ISO lists as “to be revised”.
For a product, ISO 14067:2018, consistent with the life cycle standards ISO 14040 and ISO 14044, or the GHG Protocol Product Standard.
Ask a vendor which standard each output is built to.
Which conversion factors should a UK carbon footprint tool use?
For UK activity, usually the government’s conversion factors, published once a year by DESNZ.
The 2026 set is for activity data falling entirely or mostly within 2026 (¶1.10 of the methodology paper), so a tool must keep every year’s set.
In the 2026 set, UK electricity consumed, including grid losses, is 0.14396 kgCO2e per kWh.
Can carbon footprint software make my company carbon neutral?
No. Software measures a footprint; a carbon neutrality claim needs reductions, offsetting and a standard to demonstrate it against.
ISO 14068-1:2023 was withdrawn on 11 September 2026 and is being replaced by ISO 14068:2026 (Carbon neutrality).
In the UK, offset-based carbon-neutral claims remain lawful; they are actionable only if misleading, and the ASA’s settled position is that an unqualified one is.
Is PAS 2060 still valid?
PAS 2060 was withdrawn by BSI at the end of 2025, so no one can be verified against it today.
An opinion issued for a past period remains valid for that period; it is not a current credential.
Software that still offers a “PAS 2060 report” is offering a document for a standard that cannot now be met.
Which companies sell carbon footprint software?
This site’s registry lists 65 vendors it files under carbon accounting, life cycle and product footprint, or small-business tools, alphabetically, each in its own words with any published price.
60 are filed for organisational carbon accounting and 29 for product footprints, and 24 for both.
Inclusion is not an endorsement and order is not a rank.
Do I need carbon footprint software for SECR?
Not necessarily.
SECR applies to quoted companies and to large unquoted companies and LLPs; a company is large only when it exceeds two of £36m turnover, £18m balance sheet and 250 employees, judged over two consecutive years after the first.
Its lines — energy use, emissions, an intensity ratio, the method and last year’s figures — can be produced with a spreadsheet; software earns its place as sites, years and reviewers multiply.
How much does carbon footprint software cost?
Most vendors do not publish a price.
Of the 65 in this guide’s directory, 8 publish a figure on their own pages and 3 a free tier or plan; 54 are recorded as Enterprise level · TBD.
Ask for a three-year cost that includes implementation, added sites or products, supplier volumes and the cost of exit.
Do I need a consultant or software for a carbon footprint?
Either can work, and many organisations use both.
Software holds the data year after year; a consultant earns a fee where the boundary covers several entities, Scope 3 categories are material and hard to measure, or the footprint will be verified.
Buy the one that matches the work you cannot do yourself.
Has this site tested any carbon footprint software?
No. This site has tested no products.
The page is built from the standards and UK rules that govern a footprint, each cited to its source, and the vendor directory quotes only what each vendor publishes about itself.
Sources
Primary sources
Every standard, factor and status on this page traces to the source listed here.
Vendor descriptions, prices and ownership are cited on each vendor’s profile to the vendor’s or acquirer’s own page.
Checked against 25 sources fromGHG Protocol (WRI, WBCSD)GHG ProtocolISOBSI KnowledgeUKASDepartment for Energy Security and Net Zero
- GHG Protocol (WRI, WBCSD)A Corporate Accounting and Reporting Standard
The organisational footprint: principles, consolidation approaches, Scope 1 and 2 as the required minimum.
- GHG ProtocolCorporate Value Chain (Scope 3) Standard, §6.2 and Table 5.4
The fifteen Scope 3 categories; exclusions disclosed and justified.
- GHG ProtocolScope 2 Guidance
Location-based and market-based methods.
- GHG ProtocolProduct Life Cycle Accounting and Reporting Standard
The product footprint; corporate versus product level; the joint working group with ISO (9 February 2026).
- GHG ProtocolConsolidated Corporate Standard — Standard Development Plan v2.0 (29 July 2026), §9
Consultation estimated Q2 2027; publication estimated Q4 2028.
- ISOISO 14064-1:2018 — organisation-level GHG quantification and reporting
Programme-neutral; stage 90.92, “to be revised”.
- ISOISO 14067:2018 — carbon footprint of products
Climate change only; offsetting and communication outside its scope; stage 90.92, successor at working-draft stage with no date.
- ISOISO 14040:2006 — life cycle assessment, principles and framework
Confirmed in 2022.
- ISOISO 14044:2006 — life cycle assessment, requirements and guidelines
Confirmed in 2022.
- ISOISO 14068 — Climate change management — Carbon neutrality
Will replace ISO 14068-1:2023; ISO gives the publication date as 2026-09.
- ISOISO 14068-1:2023 — catalogue record
Withdrawn on 11 September 2026 (stage 95.99).
- BSI KnowledgeBS ISO 14068-1:2023 product record
BSI’s statement of the period before PAS 2060:2014 was withdrawn.
- UKASTechnical bulletin: ISO 14068-1:2023 migration from PAS 2060
31 December 2025 migration deadline; PAS 2060 removed from the schedule.
- Department for Energy Security and Net ZeroGovernment conversion factors for company reporting
One set per activity year; the 2026 set published 11 June 2026.
- Department for Energy Security and Net Zero2026 GHG conversion factors methodology paper, ¶1.6, ¶1.10 and Table 9
The activity-year rule, the spend-based multipliers note and the electricity factors.
- Department for Energy Security and Net Zero2026 GHG conversion factors: major changes report
The electricity method change behind part of the 2026 fall.
- DefraUK and England’s carbon footprint — including spend-based emissions multipliers
The dataset behind spend-based estimates.
- legislation.gov.ukSI 2008/410, Schedule 7 (SECR)
The energy and carbon lines in a directors’ report; the size tests.
- Department for Business and TradeUK Sustainability Reporting Standards S1 and S2
Published 25 February 2026 for voluntary use.
- Department for Business and TradeUK SRS S2 Climate-related Disclosures (PDF), ¶29(a) and ¶B32
Gross Scope 1, 2 and 3; location-based Scope 2; consider all fifteen categories.
- Financial Conduct AuthorityPS26/19 — UK SRS reporting by listed companies
Comply or explain for periods beginning on or after 1 January 2027.
- Cabinet OfficePPN 006 Technical Standard for completion of Carbon Reduction Plans
Scope 1 and 2 and five named Scope 3 categories; procurement policy.
- legislation.gov.ukDigital Markets, Competition and Consumers Act 2024, Part 4
Misleading actions and omissions; in force 6 April 2025.
- Advertising Standards Authority (CAP)CAP Code section 11 — Environmental claims
Unqualified claims could mislead; absolute claims need a high level of substantiation.
- Competition and Markets AuthorityGreen Claims Code (CMA146)
Six principles, including that claims consider the full life cycle.