Carbon Accounting That Stands Up to Scrutiny
Calculate, track, and report greenhouse gas emissions across your entire value chain with GHG Protocol-aligned methodologies, 140,000+ emissions factors, and complete audit trails.
ESG:ONE replaces error-prone spreadsheets with an enterprise-grade carbon accounting engine that supports both activity-based and spend-based calculation methods. Every data point, assumption, and factor selection is logged and traceable — giving your sustainability team, auditors, and board the confidence they need.
Book a DemoWhy Carbon Accounting Fails Without the Right Tools
Most organisations still rely on spreadsheets and manual processes for carbon accounting. The result is inconsistent data, unverifiable calculations, and reports that cannot withstand audit scrutiny.
Carbon calculations are done manually in spreadsheets with no version control or audit trail, making it impossible to trace how figures were derived
Teams use different emissions factors from different sources, leading to inconsistent and incomparable results across reporting periods
Scope 3 emissions are often estimated using rough proxies or ignored entirely, leaving the largest portion of most organisations' footprints unaccounted for
There is no systematic way to collect activity data from operations, suppliers, and business units — resulting in data gaps and delays
Regulatory requirements like CSRD, ISSB, and SEC climate rules demand auditable, granular emissions data that spreadsheets simply cannot provide
Sustainability teams spend weeks compiling data instead of analysing results and driving reduction strategies
Key Benefits
GHG Protocol-Aligned Accuracy
Calculate emissions using methodologies fully aligned with the GHG Protocol Corporate Standard and Scope 3 Guidance. Support for both activity-based and spend-based approaches ensures you can account for emissions at the level of granularity your data allows.
Automated Data Collection
Eliminate manual data gathering with automated workflows that pull activity data from ERP systems, utility providers, travel platforms, and supplier portals. Reduce reporting cycles from weeks to days while improving data completeness.
Audit-Ready by Design
Every calculation includes a complete audit trail showing data sources, emissions factors applied, assumptions made, and any manual adjustments. Auditors can trace any reported figure back to its underlying data in seconds.
140,000+ Emissions Factors
Access a comprehensive, regularly updated database of over 140,000 emissions factors from DEFRA, EPA, ecoinvent, ADEME, and other authoritative sources. AI-powered factor matching suggests the most appropriate factor for each activity.
Real-Time Dashboards
Monitor your carbon footprint in real time with configurable dashboards that break down emissions by scope, category, business unit, facility, and time period. Identify hotspots and track progress against reduction targets as data flows in.
Multi-Framework Regulatory Alignment
Generate emissions disclosures that meet the requirements of CSRD, ISSB, GRI, CDP, SEC, and other frameworks simultaneously. Map your carbon data once and produce compliant outputs for every framework you report against.
Platform Capabilities
Calculation Methodologies
- Activity-based calculations using physical quantities (kWh, litres, km, tonnes)
- Spend-based calculations with economic input-output factors for categories lacking activity data
- Hybrid approaches that combine activity and spend data for optimal accuracy
- Market-based and location-based Scope 2 calculations with instrument tracking
- Automatic unit conversions and currency adjustments for global operations
Factor Management
- Curated database of 140,000+ factors from global authoritative sources
- AI-powered factor matching that suggests appropriate factors based on activity descriptions
- Support for custom and supplier-specific emissions factors with documentation
- Automatic factor updates when source databases release new versions
- Factor provenance tracking showing source, vintage, and geographic applicability
Reporting & Disclosure
- Pre-built report templates for GHG Protocol, CDP, CSRD, ISSB, and GRI
- Automated data aggregation across business units, geographies, and time periods
- Year-over-year trend analysis with base year recalculation support
- Export capabilities in multiple formats including XBRL for regulatory filings
- Board-ready summary dashboards with drill-down to source data
Data Collection & Integration
- Direct API integrations with ERP systems, utility providers, and travel platforms
- Configurable data collection workflows with approval chains and validation rules
- Bulk data import via structured templates with automated error checking
- Supplier data collection portal for Scope 3 primary data gathering
- IoT and smart meter integration for real-time energy consumption data
Related
Scope 3 Emissions Management
Tackle the largest and most complex part of your carbon footprint with supplier data collection, AI-powered factor matching, and all 15 Scope 3 categories.
Learn moreAudit Trail & Governance
Complete traceability for every data point, calculation, and disclosure — built for assurance readiness and regulatory compliance.
Learn moreData Management
Centralise, validate, and govern all your ESG data in one platform with automated collection workflows and quality controls.
Learn moreReady to Make Your Carbon Data Audit-Ready?
See how ESG:ONE can replace your spreadsheets with enterprise-grade carbon accounting that meets the demands of auditors, regulators, and investors.