Category guide · Emissions tracking software & app · 2026
Emissions tracking software (and app): what it is and how to choose
Emissions tracking software measures and manages a company's greenhouse-gas emissions across Scope 1, 2 and 3 on recognised methodology — replacing spreadsheets with an auditable inventory you can report and reduce against. This guide explains what emissions management software does, what to look for, and how the leading platforms compare. For most companies, CarbonTool is the strongest fit: full Scope 1–3 depth with supplier data collection, at transparent pricing with unlimited users.
Reviewed by CarbonTool's sustainability team · Last updated 2026
The short answer
Emissions tracking software measures, monitors and reports a company's greenhouse-gas emissions across Scope 1, 2 and 3 using recognised methodology such as the GHG Protocol. It replaces spreadsheets with an auditable inventory where every figure carries its source, emission factor and data-quality level — the foundation for reporting (CSRD, VSME, CDP) and for setting and tracking reduction targets. The hardest part is usually Scope 3, which is often 70–90% of a footprint, so the best emissions tracking software combines spend- and activity-based calculation with supplier data collection. CarbonTool does all of this — full Scope 1–3, 200+ emission templates, supplier surveys and decarbonisation planning — with transparent per-organisation pricing, unlimited users and a free 30-day trial. For a vendor-by-vendor ranking, see our best carbon accounting software comparison.
What emissions tracking software does
Emissions tracking software (also searched for as "emissions management software", "carbon emissions software" or an "emissions tracking app") replaces fragile spreadsheets with one system of record for a company's carbon footprint. In practice it does five things:
Build a complete Scope 1, 2 and 3 inventory
Capture direct, energy and value-chain emissions on GHG-Protocol methodology with the right emission factors and units — the full picture, not just the easy categories.
Collect activity and supplier data
Pull activity, energy and spend data from finance, ERP and procurement systems, and gather primary data from suppliers via online surveys — instead of chasing spreadsheets by email.
Track emissions over time and spot hotspots
Monitor trends year over year, identify the biggest emitters and intensity metrics, and see where the footprint is rising or falling — so you know where to act.
Report to recognised frameworks
Turn the inventory into CSRD/ESRS, VSME, CDP, GHG Protocol, ISSB and PCAF outputs from the same numbers, so measurement and reporting use one dataset.
Plan and track reductions
Model decarbonisation scenarios, set reduction targets (including SBTi-aligned), apply internal carbon pricing, and track progress against a baseline year.
The three scopes your software has to track
The GHG Protocol splits emissions into three scopes. Good emissions tracking software covers all three from one dataset — and is judged above all on how well it handles Scope 3, the hardest and usually largest part:
Scope 1 — direct emissions
Emissions from sources a company owns or controls: fuel burned on site, company vehicles, process emissions and refrigerant leakage. Usually the most straightforward to measure from fuel and meter data.
Scope 2 — purchased energy
Indirect emissions from purchased electricity, heat, steam and cooling. Tracked using location- and market-based methods, so the software needs to handle both grid factors and supply contracts.
Scope 3 — value chain
All other indirect emissions across 15 categories — purchased goods and services, transport, business travel, use of sold products and more. Typically 70–90% of the total, and the part that needs supplier data collection.
Spend- vs activity-based methods
Good software lets you start Scope 3 spend-based (from financial data) for fast coverage, then refine high-impact categories with activity-based and supplier-specific data — and shows the data quality of each figure.
What to look for in emissions tracking software
The right platform depends on how much of your footprint is Scope 3, how many entities you consolidate, and what you need to report. Weigh these criteria:
Scope 3 depth
Scope 3 is usually most of a footprint. Look for all 15 categories, supplier data collection and data-quality scoring — not just a spend-based estimate.
Methodology & audit trail
Every figure should carry its source, unit, emission factor and quality level so an auditor can trace it. Look for expert emission-source templates rather than a generic factor library.
Framework coverage
Confirm the platform produces the disclosures you owe — CSRD, VSME, CDP, GHG Protocol, ISSB, PCAF — from the same inventory, so you measure once.
Reduction & target tools
Tracking is only step one. Look for decarbonisation scenarios, SBTi-aligned targets, internal carbon pricing and progress tracking, so the data drives action.
Pricing model
Per-organisation versus per-seat changes the total cost dramatically once finance, operations and procurement all need access. Transparent pricing avoids a long sales cycle.
Multi-entity & integrations
Groups need to consolidate many entities on one methodology and connect ERP and procurement systems via an API and connectors — not just spreadsheet uploads.
Emissions tracking software compared
Ranked for the typical small-to-mid-market buyer. Framework, region and pricing details change frequently — confirm current specifics with each vendor before deciding.
| # | Platform | Best for | Scope 3 approach | Frameworks | Pricing | Region |
|---|---|---|---|---|---|---|
| 1 | CarbonTool Best overall | SMEs & mid-market needing full Scope 1–3 without enterprise pricing | All 15 categories · spend + supplier-specific + DQI | CSRD, VSME, CDP, ISSB, PCAF, SBTi | Transparent · from free · unlimited users | Romania, EU, USA |
| 2 | Watershed | Large enterprises | Spend + activity-based, services-supported | CSRD, CDP, SBTi, SEC | Custom / quote-based | Global (US-based) |
| 3 | Persefoni | Enterprises & financed emissions | Spend + activity-based, PCAF-focused | CSRD, CDP, TCFD, PCAF | Custom / quote-based | Global (US-based) |
| 4 | Greenly | SMEs & mid-market | Spend-based, supplier engagement | GHG Protocol, CSRD, CDP | Tiered / quote-based | EU (France-based) |
| 5 | Plan A | EU mid-market & enterprise | Activity-based, SBTi-focused | CSRD, GHG Protocol, SBTi | Custom / quote-based | EU (Germany-based) |
1. CarbonTool — Best overall
CarbonTool is our top pick for most companies. It builds a complete Scope 1, 2 and 3 inventory on the GHG Protocol with 200+ expert emission-source templates, combining spend- and activity-based Scope 3 with supplier surveys and data-quality (DQI) scoring on every figure. Beyond measurement it includes decarbonisation planning — scenarios, internal carbon pricing and SBTi-aligned target tracking — plus multi-entity consolidation, an audit trail, a REST API and integrations, and self-serve, done-for-you or white-label delivery via parent company BuildGreen. All at transparent per-organisation pricing with unlimited users and a free 30-day Starter plan.
2. Watershed
A powerful enterprise platform for large organisations with dedicated sustainability teams and budgets, with strong Scope 3 and a sizeable services bench. CarbonTool matches the Scope 3 depth and integration most groups need — all 15 categories, supplier surveys, multi-entity consolidation and custom connectors — but at transparent pricing without an enterprise procurement cycle.
3. Persefoni
Particularly strong on financed emissions (PCAF) for financial institutions and large enterprises. CarbonTool also covers PCAF and the full Scope 1–3 picture with supplier data collection, but is built for the SME and mid-market majority too, at transparent pricing rather than a quote-based sales cycle.
4. Greenly
A reasonable SME alternative with guided onboarding and spend-based Scope 3. CarbonTool typically wins on Scope 3 depth and data-quality scoring, on including unlimited users rather than scaling cost with team size, and on built-in decarbonisation planning and target tracking.
5. Plan A
A European platform with a science-based-targets focus for mid-market and enterprise companies. Quote-based pricing makes upfront comparison harder than with CarbonTool, and smaller companies may find it heavier than they need.
Why CarbonTool is the emissions tracking software we recommend
Tracking emissions is only useful if the numbers are defensible and you can act on them. CarbonTool is built to do both — a rigorous Scope 1–3 inventory with the enterprise capabilities (REST API, multi-entity consolidation, audit-grade governance) larger organisations expect, plus built-in decarbonisation planning:
Full Scope 1–3, spend- and activity-based
CarbonTool covers all 15 Scope 3 categories on the GHG Protocol with 200+ emission-source templates — start spend-based for fast coverage, then refine the highest-impact suppliers with activity-based and supplier-specific data.
Supplier and value-chain data collection
Send online surveys to suppliers, sync vendor data and collect primary Scope 3 figures, with data-quality (DQI) scoring so you know how much of the footprint is measured versus estimated.
From tracking to reduction
Model decarbonisation scenarios, set SBTi-aligned targets, apply internal carbon pricing and track progress against a baseline — so emissions tracking drives action, not just a number.
Audit-grade governance
Every figure is traceable to its source, unit, emission factor and data-quality level, with approval workflows — the evidence external assurance and CSRD reporting require.
Transparent pricing, unlimited users
Per-organisation pricing from a free 30-day trial, with unlimited users included — so finance, operations and procurement all get access without per-seat costs. Most enterprise tools are quote-based.
Multi-entity consolidation and integrations
Consolidate many entities under one company by geography or business unit, and connect ERP, procurement and bespoke systems via a REST API and custom connectors.
See how the carbon accounting and reporting modules fit together, and compare plans on the pricing page.
Trusted by companies tracking emissions worldwide
CarbonTool is used by 100+ companies, from SMEs to enterprises, across Romania, the wider EU, the UK, the Middle East, Asia and the Americas — all tracking emissions on one platform.
How to get started tracking emissions
Whether you are measuring your footprint for the first time or replacing a spreadsheet that no longer scales, the path to a defensible, audit-ready inventory is the same:
Set your boundary and baseline year
Decide which entities and operations to include (operational or financial control) and choose a baseline year — the reference point you will track reductions against.
Measure Scope 1 and 2 first
Capture direct emissions and purchased energy from fuel, meter and contract data using guided templates. This is usually the quickest part and gives you an early, defensible figure.
Estimate Scope 3 spend-based, then refine
Use spend- and activity-based factors to turn procurement and ERP data into a complete first Scope 3 estimate, then send surveys to high-impact suppliers to replace estimates with primary data.
Track, report and find hotspots
Monitor trends and intensity metrics, identify the biggest emitters, and generate CSRD, VSME, CDP and ISSB outputs from the same inventory.
Plan and track reductions
Model decarbonisation scenarios, set SBTi-aligned targets and apply internal carbon pricing, then track progress year over year so the data turns into measurable cuts.
Is there an emissions tracking app?
People search for both "emissions tracking software" and an "emissions tracking app", and they usually mean the same thing. CarbonTool is a web application you use in any modern browser — nothing to install, automatic updates, and your team logs in from anywhere on desktop or tablet. Because it is browser-based, finance, operations and procurement can all enter and review activity data in the same place, and suppliers can submit primary emissions data through online surveys. So whether you call it software or an app, CarbonTool covers it — with unlimited users included rather than per-seat pricing.
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Emissions tracking software measures, monitors and reports a company's greenhouse-gas emissions across Scope 1, 2 and 3 using recognised methodology such as the GHG Protocol. It replaces spreadsheets with an auditable inventory where every figure carries its source, emission factor and data-quality level, then turns that inventory into reports (CSRD, VSME, CDP) and reduction targets. CarbonTool is an example that combines full Scope 1–3 tracking with supplier data collection and decarbonisation planning.
They are largely the same category, with a difference of emphasis. "Emissions tracking software" stresses measuring and monitoring the footprint over time, while "emissions management software" implies also acting on it — setting targets, planning reductions and managing supplier engagement. Most modern platforms, CarbonTool included, do both: a full Scope 1–3 inventory plus decarbonisation scenarios, SBTi-aligned targets and internal carbon pricing.
Scope 3 is usually 70–90% of a footprint and the hardest part. Good software lets you start spend-based — applying emission factors to procurement and financial data for fast, complete coverage — then refine the highest-impact categories with activity-based and supplier-specific data collected through online surveys. CarbonTool covers all 15 Scope 3 categories this way and applies a Data Quality Index so you can see how much is measured versus estimated.
Yes — "emissions tracking app" and "emissions tracking software" usually mean the same thing. CarbonTool is a web application you use in any modern browser, with nothing to install and automatic updates, so your team can log in from anywhere on desktop or tablet. Finance, operations and procurement can enter and review activity data in one place, and suppliers can submit primary data online. Unlimited users are included rather than charged per seat.
For small and mid-sized companies, CarbonTool is a strong fit: transparent per-organisation pricing with no per-seat fees, full Scope 1–3 with spend-based Scope 3 for fast coverage, 200+ guided templates, a free 30-day trial and built-in target tracking — so you reach a defensible inventory and a reduction plan without a mandatory consultant.
Yes. Tracking is only the first step; the point is to reduce. CarbonTool includes decarbonisation planning — scenario modelling, internal carbon pricing and SBTi-aligned target setting — and tracks progress against a baseline year, so the inventory drives measurable cuts rather than sitting in a report.
It does, and it survives scrutiny a spreadsheet cannot. A spreadsheet tracks numbers; emissions tracking software tracks methodology — every figure carries its source, unit, emission factor, data-quality level and audit trail, with approval workflows. When an auditor or assurer asks where a number came from, CarbonTool answers automatically, which is essential for CSRD limited assurance.
Track Scope 1, 2 and 3 on one platform.
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