Carbon Reporting Software & Carbon Emissions Software
Carbon reporting software and carbon emissions software measure, track and disclose a company's greenhouse-gas emissions โ automating data collection, applying the correct emission factors, and producing reports aligned to the GHG Protocol, SECR and UK SRS.
This is our independent assessment of the leading carbon reporting tools and carbon emissions reporting software platforms for UK companies in 2026.
UK Regulation Focus
All carbon reporting 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
Our top pick for carbon reporting software & tools
Climatise
The strongest fit for UK companies whose priority is SECR and UK SRS alignment. It is built around UK reporting obligations rather than retrofitted from a generic global ESG tool, 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 SRS reporting, that UK-first focus is why we'd look at it first.
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
โ Read the full Climatise review ยท Visit climatise.com
How we chose the best carbon emissions software
For UK companies, we weighed each **carbon reporting software** platform and carbon emissions 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.
- UK standards alignment โ does it map cleanly to SECR's statutory format and UK SRS S2, not just generic ESG output?
- DESNZ factor integration โ does it use the current UK Government GHG conversion factors, updated annually?
- Scope 3 coverage โ can it handle all <InlineLink href="/scope-3-under-uk-srs">15 categories under UK SRS</InlineLink>, and both spend-based and activity-based methods?
- Assurance readiness โ does it keep the audit trail and methodology documentation that third-party assurance requires?
- Usability and UK support โ onboarding, data integrations, and support that understands UK regulation.
- Transparent pricing โ clear pricing rather than opaque "contact us only".
Each **carbon reporting software** platform receives assessment across six core criteria 1 that determine UK regulatory compliance and assurance readiness.
The best carbon reporting software & carbon emissions software platforms
Below are the **carbon reporting software** and **carbon emissions software** platforms we'd shortlist for UK companies, from UK-native tools to global enterprise suites.
These carbon reporting software tools and GHG platforms represent the leading options for carbon emissions reporting in 2026.
#1 is our editorial pick for SECR/SRS fit.
**The remaining six are not a strict ranking** โ they're ordered by how closely they fit a UK SECR-to-SRS reporting journey.
Each links to a full carbon reporting software review.
Climatise
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 โ SECR + ESOS + SRS
- Every figure traceable from source document to output for assurance
Considerations
- Smaller vendor than the US enterprise names
- Pricing not published
Normative
Often called the original carbon accounting platform; strong on data quality and Scope 3 accuracy, with a London presence.
Strengths
- Independent third-party validation of calculation engine
- Dedicated climate expert model
- Deep Scope 3
Considerations
- Enterprise-oriented
- Pricing not published
Greenly
Accessible, AI-assisted carbon and ESG suite popular with smaller and mid-market companies across Europe.
Strengths
- Named #1 Sustainability Management software on G2
- AI "EcoPilot" copilot
- Broad ESG breadth
Considerations
- Spend-based defaults can be less granular than activity-based for Scope 3 hotspots
Watershed
Enterprise-grade platform with strong reporting automation and scenario modelling.
Strengths
- Named a Leader in the 2026 Verdantix Green Quadrant
- One-click reporting
- Large emissions volume under management
Considerations
- Built for scale โ likely heavier than an SME needs
Persefoni
Assurance-grade platform focused on regulatory disclosure and financed (portfolio) emissions.
Strengths
- Forrester Wave leader
- AI Copilot
- Designed for assurance readiness
Considerations
- US regulatory heritage
- UK SECR is a fit but not the primary design centre
Sweep
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
Plan A
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
Microsoft Sustainability Cloud
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
Salesforce Net Zero Cloud
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
Workiva Carbon
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
Sphera
Life-cycle-assessment-led platform whose verified datasets drive product-level and Scope 3 footprints.
Strengths
- Managed LCA Content database
- Product decarbonisation depth
- Named a Verdantix Green Quadrant leader
Considerations
- Enterprise scale; not an SME SECR tool
IBM Envizi ESG Suite
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
Cority
Converged EHS, quality and ESG platform that ties carbon reporting to operational compliance data.
Strengths
- EHS and carbon in one platform
- Verdantix leader; acquired Greenstone
- Cortex AI tooling
Considerations
- Enterprise commitment; no lightweight SME tier
SINAI Technologies
CFO-first decarbonisation platform built around internal carbon pricing and abatement economics.
Strengths
- Internal carbon pricing and abatement-cost modelling
- Financial transition planning
- Recognised by Verdantix for net-zero strategy
Considerations
- Strategy-led; not a native UK statutory filing tool
Emitwise
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
Sami
All-in-one carbon and ESG platform โ France's most-used โ 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
Seedling
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
Carbon reporting tools & emissions software comparison
Carbon emissions software vs outsourced reporting
Carbon emissions software and carbon reporting 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 reporting software in-house.
Many use a hybrid โ carbon reporting software for ongoing measurement, expert review for assurance readiness.
The decision comes down to resource allocation: **carbon reporting 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 reporting software** tends to win, according to IAASB sustainability assurance standards.
Best carbon & SECR reporting 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.
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, and our SECR overview for 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.
Scope 1, 2 and 3 emissions software
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 5.
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.
GHG and greenhouse gas reporting software
Greenhouse gas reporting software โ often searched as GHG reporting software โ is the same category as carbon reporting software: it measures COโe 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.
Frequently asked questions
What does carbon reporting software do?
<strong>Carbon reporting software</strong> and <strong>carbon emissions software</strong> pull activity data (energy, fuel, travel, purchased goods), apply DESNZ/GHG-Protocol factors <CiteRef n={1} />, organise results by Scope 1/2/3 <CiteRef n={5} />, and produce SECR- and UK SRS-format reports with an audit trail. These carbon reporting tools automate emissions calculations for compliance.
How to evaluate the carbon accounting & ESG software company Watershed on SECR compliance UK?
To <strong>evaluate the carbon accounting & ESG software company Watershed on SECR compliance UK</strong>, 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 reporting software?
UK standards alignment (SECR <CiteRef n={2} /> + UK SRS S2 <CiteRef n={3} />), current DESNZ factors <CiteRef n={1} />, full Scope 3 (15 categories, spend + activity), assurance-ready audit trail, transparent pricing.
Can carbon reporting software handle Scope 3 emissions?
Yes; the better **carbon reporting software** tools cover all 15 categories <CiteRef n={5} /> using both spend-based estimates and activity-based data, refining from estimates to actuals via supplier engagement.
Do I need carbon reporting software or a consultant?
**Carbon reporting 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 reporting software use UK (DESNZ) emission factors?
The UK-focused **carbon reporting software** tools build in the UK Government GHG conversion factors <CiteRef n={1} /> (historically the DEFRA factors), updated annually by DESNZ.
Is carbon reporting mandatory in the UK?
SECR already applies to ~11,000 companies. UK SRS is currently voluntary (published 25 Feb 2026); the FCA has proposed mandatory UK SRS S2 for listed companies from 1 January 2027, with final rules expected autumn 2026.
