Automate your carbon calculations
GHG Protocol-aligned Scope 1, 2, and 3 tracking with transparent assumptions, smart emission factors, and full audit trails.
Carbon Capabilities
Complete Carbon Management
From data collection to verified reports — every step of your carbon journey.
Automated Scope 1–3 Calculations
Step-by-step guidance through every emission scope, with automated calculations aligned to the GHG Protocol.
AI Emission Factor Matching
AI suggests the most appropriate emission factors for your activities, with full transparency on sources and methodology.
Data Validation & Quality
Automated checks catch errors, outliers, and missing data before they reach your reports. AI fills gaps with transparent estimates.
Interactive Dashboards
Real-time visualisations of your carbon footprint by scope, category, and time period. Drill down into any data point.
Audit-Ready Reports
Generate GHG Protocol-compliant reports with full evidence trails. Every calculation traceable from source data to final figure.
Reduction Forecasting
Model reduction scenarios, track progress against targets, and visualise your pathway to net zero.
Why Choose Horizon ESG for Carbon Accounting?
Organisations today face growing pressure from regulators, investors, and customers to measure and reduce their carbon footprint accurately. Horizon ESG’s carbon accounting software is purpose-built to meet these demands, combining rigorous GHG Protocol methodology with intelligent automation that saves your team hundreds of hours each reporting cycle.
Unlike spreadsheets and generic tools, our carbon reporting tool provides a structured, auditable workflow from raw activity data to final disclosure. Every emission factor is sourced and documented, every calculation is transparent, and every figure can be traced back to its origin. This level of rigour is what auditors expect — and what sets professional GHG Protocol software apart from manual approaches.
Built for Accuracy at Scale
As your organisation grows, so does the complexity of your carbon footprint. Horizon ESG’s carbon accounting software handles multi-site, multi-entity reporting with ease. Whether you operate in one country or fifty, the platform consolidates activity data, applies region-specific emission factors, and produces a unified carbon inventory that meets international standards.
Scope 3 Made Manageable
Scope 3 emissions often represent the largest share of an organisation’s carbon footprint, yet they are the hardest to measure. Our carbon reporting tool simplifies Scope 3 with supplier data collection workflows, spend-based estimation models, and AI-assisted categorisation across all 15 GHG Protocol categories. The result is a comprehensive footprint that stands up to external scrutiny.
Seamless Regulatory Integration
Carbon data does not exist in isolation. Horizon ESG connects your carbon inventory directly to CSRD disclosures and broader ESG reporting frameworks. When your carbon figures update, the relevant ESRS data points update too — eliminating manual transfers and version-control risks. You can also leverage our AI automation features to accelerate narrative drafting around climate-related disclosures.
Frequently Asked Questions
What emission factor databases does Horizon ESG support?
Our GHG Protocol software includes built-in access to major emission factor databases including DEFRA, EPA, ADEME, ecoinvent, and the IEA. The platform automatically selects the most appropriate factors for your activities based on geography and industry, and you can add custom factors where needed.
Can I use Horizon ESG if I have never measured my carbon footprint before?
Absolutely. The carbon accounting software includes guided onboarding that walks you through each scope step by step. AI-powered data mapping helps you categorise your activity data correctly, even if you are starting from raw utility bills and invoices. Most organisations complete their first full carbon inventory within weeks, not months.
How does the carbon reporting tool handle data from multiple sites or subsidiaries?
Horizon ESG supports multi-entity hierarchies with role-based access. Each site or subsidiary can enter data independently, while head-office users see a consolidated view. The platform handles equity share and operational control consolidation approaches as defined by the GHG Protocol, and you can switch between methods at any time.
Getting Started
Carbon tracking in three steps
From initial data import to verified carbon reports — our guided workflow gets you operational quickly.
Import Data
Connect your activity data sources — energy bills, travel records, procurement — or upload spreadsheets. Our AI helps map and validate your data automatically.
Calculate & Verify
The platform applies GHG Protocol methodology, matches emission factors, and calculates your Scope 1, 2 and 3 footprint with full transparency.
Report & Reduce
Generate audit-ready carbon reports, set science-based targets, and track reduction initiatives with real-time progress dashboards.
Start tracking carbon with confidence
See how Horizon ESG automates carbon calculations and delivers audit-ready reports.