The best carbon management & carbon accounting software platforms
17 carbon management software and carbon accounting software platforms for UK companies, from UK-native tools to global enterprise suites, ranked below.
#1 is our editorial pick for SECR/SRS fit; the rest are ordered by how closely they fit a UK SECR-to-SRS reporting journey, not a strict league table.
Each links to a full review.
For the wider category beyond emissions, see our sustainability software guide.
For the measurement standard behind every tool, see the GHG Protocol — the Corporate Accounting and Reporting Standard and its Corporate Value Chain (Scope 3) Standard are what every platform here implements.
To map the figures to disclosure, see UK SRS S2 and SECR thresholds.
The statutory wording behind those thresholds is in SI 2018/1155, and the standards themselves are published by DBT as UK SRS S1 and S2.
An independent carbon reporting software buyer's guide covers the same market, useful as a second opinion alongside this ranking.
#1★ Editorial Pick
A UK-first carbon platform built around SECR, ESOS and UK SRS rather than retrofitted from a global ESG suite.
Strengths
- UK-regulation-native
- One dataset → SECR + ESOS + SRS
- Every figure traceable from source document to output for assurance
Considerations
- Smaller vendor than the US enterprise names
- Pricing not published
#2
Often called the original carbon accounting platform; strong on data quality and Scope 3 accuracy, with a London presence.
Strengths
- Calculation engine covering GHG Protocol scopes 1, 2 and 3
- Dedicated climate expert model
- Deep Scope 3
Considerations
- Enterprise-oriented
- Pricing not published
#3Accessible, AI-assisted carbon and ESG suite popular with smaller and mid-market companies across Europe.
Strengths
- Carbon accounting with supplier engagement and CSRD reporting
- AI "EcoPilot" copilot
- Broad ESG breadth
Considerations
- Spend-based defaults can be less granular than activity-based for Scope 3 hotspots
#4
Enterprise-grade platform with strong reporting automation and scenario modelling.
Strengths
- Supply-chain emissions data collection at enterprise scale
- One-click reporting
- Large emissions volume under management
Considerations
- Built for scale — likely heavier than an SME needs
#5
Assurance-grade platform focused on regulatory disclosure and financed (portfolio) emissions.
Strengths
- Financed-emissions and PCAF-aligned reporting
- AI Copilot
- Designed for assurance readiness
Considerations
- US regulatory heritage
- UK SECR is a fit but not the primary design centre
#6
Collaborative carbon and ESG platform with strong supplier-data and value-chain features.
Strengths
- "Upload once, use across all frameworks"
- Supplier engagement
- Strong governance/validation
Considerations
- Breadth can mean a steeper setup for a SECR-only use case
#7
Decarbonisation-first platform built with a scientific advisory board and third-party certification.
Strengths
- Independently certified methodology
- Scientific advisory board
- Strong reduction modelling
Considerations
- EU/CSRD design centre
- SECR supported but not UK-first
#8
Enterprise carbon and ESG data management that runs inside the Microsoft 365 and Azure estate.
Strengths
- Native Microsoft 365 and Azure integration
- Enterprise-grade security and governance
- Power Platform extensibility
Considerations
- UK statutory formatting needs configuration
- Best value only inside the Microsoft estate
#9
CRM-native carbon accounting that keeps emissions data beside customer and operational records.
Strengths
- Carbon data inside Salesforce objects and workflows
- What-If scenario analysis
- AI-assisted disclosure hub
Considerations
- Limited appeal outside the Salesforce ecosystem
#10
Finance-grade connected reporting that puts carbon, ESG and financial disclosure on one audit trail.
Strengths
- One source of truth for financial and ESG reporting
- Assurance-ready controls and audit trail
- Pre-built disclosure frameworks
Considerations
- Broader and heavier than a SECR-only requirement
#11
Life-cycle-assessment-led platform whose verified datasets drive product-level and Scope 3 footprints.
Strengths
- Managed LCA Content database
- Product decarbonisation depth
- Product-level LCA and regulatory compliance modules
Considerations
- Enterprise scale; not an SME SECR tool
#12
A data-foundation ESG suite that consolidates sustainability data into a single governed system of record.
Strengths
- Strong data consolidation and auditability
- Hundreds of data connectors
- Backed by IBM
Considerations
- Enterprise focus; UK statutory output via configuration
#13
Converged EHS, quality and ESG platform that ties carbon reporting to operational compliance data.
Strengths
- EHS and carbon in one platform
- Acquired Greenstone; EHS and sustainability modules
- Cortex AI tooling
Considerations
- Enterprise commitment; no lightweight SME tier
#14
CFO-first decarbonisation platform built around internal carbon pricing and abatement economics.
Strengths
- Internal carbon pricing and abatement-cost modelling
- Financial transition planning
- Net-zero pathway modelling and scenario tools
Considerations
- Strategy-led; not a native UK statutory filing tool
#15
London-founded platform using machine learning to close supplier Scope 3 data gaps for manufacturers.
Strengths
- AI-driven Scope 3 estimation
- Supplier engagement workflows
- UK-founded
Considerations
- Specialist focus; not a broad all-ESG suite
#16
All-in-one carbon and ESG platform — France's most-used — pairing software with advisory, now part of SGS.
Strengths
- Carbon Hub and ESG Hub in one platform
- SGS assurance backing
- Expert consulting included
Considerations
- France-first; UK statutory SECR needs configuration
#17
SME-focused carbon reporting that pairs affordable software with a dedicated 1:1 sustainability adviser.
Strengths
- Dedicated adviser model
- Fast, guided onboarding
- SME-appropriate pricing
Considerations
- Not built for enterprise-scale complexity
Our top pick, in depth: why Climatise
Climatise
The strongest fit for UK companies whose priority is SECR and UK SRS alignment.
Key strengths:
- Built specifically for UK SECR and UK SRS requirements
- Comprehensive Scope 1, 2 and 3 coverage with audit trail capability
- DESNZ conversion factor integration with annual updates
- Disclosure-ready output format aligned to UK statutory requirements
It is built around UK reporting obligations rather than retrofitted from a generic global ESG tool.
It covers Scopes 1, 2 and 3 with value-chain depth, and is geared toward producing disclosure-ready, auditable output.
For organisations preparing for the shift from SECR toward UK SRSreporting, that UK-first focus is why we'd look at it first.
→ Read the full Climatise review · Visit climatise.com
A second independent Climatise carbon reporting software review is also available.
Carbon management software comparison
On a phone? Swipe the table sideways to see every column.
| Platform | Best for | Scopes | UK SRS/SECR fit | Scope 3 method | HQ |
|---|---|---|---|---|---|
| UK companies moving from SECR toward mandatory UK SRS reporting | 1, 2 & 3 | Excellent | Spend + Activity | London, UK | |
| Enterprises needing audit-ready, independently validated emissions data | 1, 2 & 3 | Very Good | Activity-based | Stockholm | |
| SMEs and mid-market teams wanting broad ESG coverage beyond carbon | 1, 2 & 3 | Good | Spend + Activity | Paris | |
| Large enterprises and multinationals with in-house sustainability teams | 1, 2 & 3 | Good | Activity-based | US | |
| Financial institutions and large corporates under regulatory/assurance pressure | 1, 2 & 3 | Good | Spend + Activity | Tempe, Arizona | |
| Organisations managing complex multi-tier supply-chain emissions across frameworks | 1, 2 & 3 | Good | Activity-based | France | |
| Companies that want measurement tightly coupled to a science-based reduction roadmap | 1, 2 & 3 | Good | Activity-based | Berlin | |
| Large organisations already standardised on Microsoft for data and security | 1, 2 & 3 | Very Good | Activity-based | Redmond, US | |
| Companies that already run their business on the Salesforce platform | 1, 2 & 3 | Very Good | Activity-based | San Francisco, US | |
| Public companies and finance-led teams facing ISSB and CSRD together | 1, 2 & 3 | Good | Activity-based | Ames, Iowa, US | |
| Manufacturing, energy and chemicals needing product-level carbon | 1, 2 & 3 | Good | Activity-based | Chicago, US | |
| Large enterprises wanting a governed ESG data backbone | 1, 2 & 3 | Good | Activity-based | US | |
| Regulated heavy industry with EHS-led compliance | 1, 2 & 3 | Good | Activity-based | Toronto, Canada | |
| CFOs and private-equity portfolios linking carbon to capital decisions | 1, 2 & 3 | Good | Activity-based | San Francisco, US | |
| Manufacturing supply chains where Scope 3 dominates the footprint | 1, 2 & 3 | Very Good | Activity-based | London, UK | |
| European and French-market mid-market wanting software plus advisory | 1, 2 & 3 | Good | Activity-based | Paris, France | |
| UK SMEs without an in-house sustainability function | 1, 2 & 3 | Very Good | Activity-based | London, UK |
How we chose the best carbon management software
For UK companies, we weighed each carbon management software platform and carbon accounting tool against the things that actually determine whether it produces a defensible disclosure:
Our assessment criteria align with UK Government SECR guidance and emerging FCA UK SRS requirements.
Our own assurance-readiness criterion is informed by ISO 14064-1, the international standard for organisation-level GHG quantification and reporting.
The assurance standard UK reporters will actually be measured against is ISSA (UK) 5000, adopted by the FRC.
DESNZ's own post-implementation review of the SECR Regulationsis the other reference point: it is the government's own account of where SECR reporting works and where it does not.
- UK standards alignment — does it map cleanly to SECR's statutory format and UK SRS S2, not just generic ESG output?
- DESNZ factor integration — does it use the current UK Government GHG conversion factors, updated annually?
- Scope 3 coverage — can it handle all 15 Scope 3 categories under UK SRS, with both spend-based and activity-based methods?
- Assurance readiness — does it keep the audit trail and methodology documentation that third-party assurance requires?
- Usability and UK support — onboarding, data integrations, and support that understands UK regulation.
- Transparent pricing — clear pricing rather than opaque "contact us only".
Each carbon management software platform receives assessment across six core criteria 1 that determine UK regulatory compliance and assurance readiness.
How UK reporting regimes drive software choice
Which regimes you fall under decides what your software must produce.
SECR applies to quoted companies, and to large unquoted companies and LLPs exceeding two of three thresholds — £36 million turnover, £18 million balance sheet, 250 employees 9.
Disclosure sits in the Directors' Report, under SI 2018/1155 and section 414CB of the Companies Act 2006.
Our SECR compliance guide covers the mechanics.
For a second walkthrough of the same filing mechanics, see this companion SECR reporting guide.
ESOS Phase 4 runs on an either/or test — 250 or more employees, or turnover over £44 million and balance sheet total over £38 million — with a compliance deadline of 5 December 2027 10.
The test itself is set in regulation 5 of the ESOS Regulations 2014, with the current GBP figures given in DESNZ and Environment Agency guidance.
Platforms that hold energy data once and reuse it across SECR and ESOS remove duplicate collection.
UK SRS S2 was published by the Department for Business and Trade on 25 February 2026 3.
It is proposed mandatory under FCA CP26/5 4 for 515 of the roughly 600 listed companies the consultation would affect — the remaining 89, listed only in the secondary listing or depositary receipts categories, would instead make a statement about the standards they follow — for financial years beginning 1 January 2027, subject to the FCA's policy statement (not yet published), superseding TCFD-aligned reporting.
UK SRS S1 and S2 are the UK's adoption of the IFRS Sustainability Disclosure Standards, so a platform that already produces IFRS S2-shaped output has most of the work done.
Our UK SRS compliance guide maps the disclosure requirements.
The UK SRS compliance calculator checks which regimes apply to your company.
The regulator's side of that timetable is covered in our guide to the FCA sustainability disclosure requirements, including what is still subject to the autumn 2026 Policy Statement.
For the full month-by-month rollout, a companion S1 and S2 implementation calendar tracks the same dates from an independently maintained reference.
Carbon management software vs outsourced reporting
Carbon management software and carbon accounting tools suit organisations building an in-house, repeatable reporting process.
Smaller companies, or those reporting for the first time, sometimes prefer outsourced carbon accounting or a carbon consultancy for support.
This approach helps get the first inventory right before bringing carbon management software in-house.
Many use a hybrid — carbon management software for ongoing measurement, expert review for assurance readiness.
The decision comes down to resource allocation: carbon management software builds internal capability and lowers cost over time.
Consultancy gives immediate expertise at higher ongoing cost.
For UK SRS S2 readiness, the assurance expectation favours approaches that can demonstrate consistent methodology and a complete audit trail.
This is where platform-based carbon management software tends to win, according to IAASB sustainability assurance standards.
Best carbon management software by use case
The right tool depends on which UK obligation you are reporting against.
The use-case guides below map the platforms above to the specific searches UK teams run, from SECR filing to Scope 3 measurement.
The 3 types of carbon management software
There are three types of carbon management software: dedicated carbon accounting platforms, full ESG and sustainability suites, and single-purpose point tools.
Dedicated carbon accounting platforms focus on the Scope 1, 2 and 3 inventory itself — activity data in, DESNZ and GHG Protocol factors applied, SECR- and UK SRS-format output out.
Most of the 17 platforms compared above fall into this type.
Full ESG and sustainability suites add carbon accounting as one module inside a wider disclosure workflow that also covers governance, social metrics and non-climate ESG reporting.
Single-purpose point tools target one specific need rather than the whole inventory — Scope 3 supplier-data collection, or SECR filing alone, for example.
Which type fits depends on whether you need a standalone emissions engine, carbon folded into a broader ESG programme, or a narrow fix for one reporting gap.
The comparison above spans all three.
Best software for SECR reporting in the UK
The best software for SECR reporting in the UK applies the UK Government GHG conversion factors 1 automatically and outputs energy use and emissions in the format Streamlined Energy and Carbon Reporting requires 2.
For the qualifying tests behind a SECR filing, see our SECR thresholds guide.
Our SECR overviewcovers the directors' report mechanics.
Our editorial pick for UK SECR filers is Climatise, because one dataset flows from SECR through to ESOS and UK SRS without re-keying.
Accurate Scope 1, 2 and 3 tracking and calculation platforms
Accuracy in Scope 1, 2 and 3 tracking and calculation comes down to three regime-specific checks, not the platform's brand: the DESNZ factor year it applies, the Scope 2 method it defaults to, and how it discloses Scope 3 category exclusions.
Factor year. DESNZ's own methodology for the 2026 conversion factors states they are “for use with activity data that falls entirely or mostly within 2026” 21.
The factor year should match the year the activity happened, not the year the report is filed or the factors were published — a platform still defaulting to an older factor set for current-year activity data is measuring inaccurately.
Scope 2 method. For companies applying UK SRS S2 — voluntary today, proposed mandatory for FCA-listed companies from 2027 — the standard requires location-based Scope 2 reporting; market-based figures may be disclosed alongside where contractual instruments exist, but they do not replace it 20.
An accurate platform defaults to location-based Scope 2 and treats market-based as an addition, not a substitute.
Scope 3 category disclosure. Scope 1, 2 and 3 emissions software separates direct combustion, purchased energy, and value-chain emissions across all fifteen Scope 3 categories defined by the GHG Protocol's Scope 3 Standard, which requires accounting for all fifteen categories with any exclusion disclosed and justified, rather than treated as an optional pick-list 13.
A platform that shows which categories are included, and why any are excluded, is producing the accurate version of a Scope 3 figure; a single lump total is not.
Scope 3 is where most UK inventories are incomplete.
Our Scope 3 under UK SRS guide explains which categories matter and how platforms estimate them, against the GHG Protocol Scope 3 Standard that defines all fifteen.
Greenhouse gas and GHG reporting software
Greenhouse gas reporting software — often searched as GHG reporting software — is the same category as carbon management software: it measures CO₂e using DESNZ factors 1 and the GHG Protocol's corporate standard 5.
Every platform in the comparison above qualifies.
The differences are Scope 3 depth, assurance readiness, and UK-regulation fit rather than the underlying emissions maths.
Carbon accounting software for UK companies
Carbon accounting software for UK companies pairs the emissions inventory with the disclosure requirements of UK SRS S2 3, so the same figures support both voluntary and mandatory climate reporting.
UK-built platforms hold an edge here because they track SECR, ESOS and UK SRS deadlines natively rather than retrofitting a global ESG suite to UK rules.
The UK Government GHG conversion factors are republished by DESNZ each June, so check how quickly a vendor ships the new set.
Carbon accounting, carbon management and carbon tracking software — same category, different names
Carbon accounting software, carbon management software and carbon tracking software all describe the same class of tool covered in this comparison — measuring emissions, applying DESNZ conversion factors 1, and producing SECR- and UK SRS-ready output.
UK buyers searching for the top carbon accounting software are looking at the same 17-platform shortlist reviewed above.
A separately maintained ranking of the best carbon accounting software for UK companies scores that same market against native SECR output and UK SRS S2 readiness.
The shortlist is filtered by how closely each platform maps to SECR and UK SRS S2, rather than by a separate feature set.
Where SECR alone is the question, a companion reference on SECR reporting softwarejudges that fit against Schedule 7's five required artefacts rather than against the ranking above.
Carbon management software typically adds broader target-setting and reduction-planning features on top of the core accounting engine.
Carbon tracking software emphasises ongoing monitoring — continuous data capture from utility bills, fuel cards and travel systems rather than a once-a-year inventory exercise.
For UK companies preparing SECR or UK SRS disclosures, the distinction rarely matters in practice.
Our top pick and the other platforms in the comparison table above cover accounting, management and tracking within a single product.
UK Regulation Focus
All carbon management software platforms assessed for SECR and emerging UK SRS S2 compliance
DESNZ Factor Integration
Tools evaluated on UK Government conversion factor implementation
Assurance Readiness
Audit trail and methodology documentation assessed for third-party verification
Independent Assessment
No vendor payments, sponsorship, or commercial relationships
Frequently asked questions
What is the best carbon management software in the UK?
Carbon management software is the same category as carbon accounting and carbon reporting software — tools that measure emissions, apply DESNZ and GHG Protocol factors, and produce SECR- and UK SRS-ready output.
Of the 17 UK-relevant platforms compared here, our top pick is Climatise.
Strong alternatives follow depending on company size, Scope 3 depth and assurance needs.
What are the types of carbon management software?
Broadly three: (1) dedicated carbon accounting and measurement platforms focused on Scope 1-3 inventories; (2) full ESG and sustainability suites that add carbon to wider disclosure workflows; and (3) point tools targeting a single need such as Scope 3 supplier data or SECR reporting.
The comparison below spans all three so you can match the type to your use case.
Is carbon accounting software the same as carbon reporting software?
Largely yes.
Carbon accounting software, carbon reporting software, carbon management software and emissions software all describe the same class of tool — one that measures greenhouse-gas emissions, applies DESNZ and GHG Protocol factors, and produces SECR- and UK SRS-ready reports.
"Accounting" emphasises measurement and the audit trail; "reporting" emphasises the disclosure output.
The 17 UK platforms compared below cover both.
What does carbon management software do?
Carbon management software and carbon accounting software pull activity data (energy, fuel, travel, purchased goods), apply DESNZ/GHG-Protocol factors, organise results by Scope 1/2/3, and produce SECR- and UK SRS-format reports with an audit trail.
This carbon management software automates emissions calculations for compliance.
How to evaluate the carbon accounting & ESG software company Watershed on SECR compliance UK?
To evaluate the carbon accounting & ESG software company Watershed on SECR compliance UK, assess: (1) DESNZ emissions factor coverage for UK electricity and fuels, (2) automatic kWh consolidation across sites for SECR energy reporting, (3) intensity metrics calculation (revenue/floor area), and (4) report output matching Companies Act 2006 s414C(7) format.
Watershed scores highly with automated data collection, SECR-compliant outputs, and enterprise-scale processing.
What should UK companies look for in carbon management software?
UK standards alignment (SECR + UK SRS S2), current DESNZ factors, full Scope 3 (15 categories, spend + activity), assurance-ready audit trail, transparent pricing.
Can carbon management software handle Scope 3 emissions?
Yes; the better carbon management software tools cover all 15 categories using both spend-based estimates and activity-based data, refining from estimates to actuals via supplier engagement.
Do I need carbon management software or a consultant?
Carbon management software for ongoing, repeatable reporting and cost control; consultancy for one-off first inventories or specialist assurance.
Hybrid approaches combining both are common.
Does carbon management software use UK (DESNZ) emission factors?
UK-focused carbon management software tools build in the UK Government GHG conversion factors (historically the DEFRA factors), updated annually by DESNZ.
Is carbon reporting mandatory in the UK?
SECR already applies to an estimated 19,900 organisations, per DESNZ's own evaluation.
UK SRS is currently voluntary, published 25 February 2026.
The FCA has proposed mandatory UK SRS S2 for listed companies from 1 January 2027, with final rules expected autumn 2026 — no Policy Statement has been published yet.
Sources
Authority sources
