Best Tools to Measure Your Scope 3 Emissions in 2026

TL;DR

Scope 3 emissions (indirect GHGs from a company’s value chain) often represent the largest and trickiest part of corporate carbon accounting. Tools like ECOOS, Persefoni, Sweep, Greenly, Salesforce Net Zero Cloud, Sphera, IBM Envizi, and Sinai help businesses collect, analyze, and report Scope 3 data. By centralizing supplier information, automating calculations, and aligning with GHG Protocol standards, these platforms make it easier to measure hidden emissions, prioritize reductions, and achieve credible, audit-ready ESG reporting.

Scope 3 emissions are the indirect greenhouse gas (GHG) emissions that come from a company’s value chain, things the company doesn’t directly control but that happen because of its operations. This includes supplier emissions, transportation, products sold, business travel, employee commuting, waste, and more. Scope 3 typically makes up the largest share of a company’s total emissions, but it’s also the hardest to measure accurately.

Measuring Scope 3 emissions is critical for accurate ESG reporting and real climate action because it reveals the hidden emissions outside direct operational control.

According to widely‑used standards like the GHG Protocol, Scope 3 accounting covers up to 15 categories of indirect emissions, which range from purchased goods and services to investments and leased assets.

Challenges in Measuring Scope 3

Measuring Scope 3 emissions is more complex than Scope 1 or Scope 2 because:

• Data comes from multiple external parties, like suppliers or logistics partners

• Methodologies vary depending on the category (e.g., purchased goods versus employee commuting)

• Companies may lack internal systems for collecting consistent and quality data

• Some emissions must be estimated using emission factors or life cycle databases

These challenges make it hard for organisations to get accurate, comparable Scope 3 results, which is where software tools come in.

Tool 1 – ECOOS

Tool 2 – Persefoni

Overview & how it works: Persefoni is a carbon accounting platform designed to handle complex Scope 3 emissions. It supports all categories of Scope 3, providing flexible calculation methods and data transparency. Its dashboards are designed to help teams understand where emissions occur, engage suppliers, and improve data quality over time.

Unlike basic tracking tools, Persefoni helps prioritise suppliers with the greatest emissions impact and incorporates supplier‑reported data into hybrid calculations, gradually improving accuracy. Its methodology aligns with GHG Protocol standards, making results suitable for reporting and compliance.

Best fit: Mid‑sized to large enterprises aiming for audit‑ready Scope 3 accounting and decarbonisation planning.

Tool 3 – Sweep

Overview & how it works: Sweep is a collaborative platform with strong supplier engagement tools for Scope 3. It helps companies collect emissions data from value chain partners, centralise it, and track reduction efforts. Sweep’s interface focuses on scalability and real‑time visibility, letting organisations build emission inventories across all Scope 3 categories.

Best fit: Companies with distributed supply chains that want to involve suppliers directly in data collection and reduction efforts.

Tool 4 – Greenly

Overview & how it works: Greenly offers automated carbon accounting solutions that simplify Scope 3 data gathering and calculations. The platform automates emissions estimates from suppliers, transportation, and purchases, making it easier for growing businesses to start measuring Scope 3 without heavy manual work.

Best fit: Small to mid‑sized companies or teams new to Scope 3 reporting.

Tool 5 – Salesforce Net Zero Cloud

Overview & how it works: Built on Salesforce’s CRM infrastructure, Net Zero Cloud helps organisations report and manage Scope 3 emissions alongside other sustainability metrics. It is particularly strong at supplier engagement and collaboration, enabling businesses to create shared data environments with partners.

Best fit: Organisations already using Salesforce that want integrated sustainability tracking.

Tool 6 – Sphera

Overview & how it works: Sphera offers a comprehensive carbon accounting solution with a focus on detailed Scope 3 emission reporting and supplier collaboration. It is often used in industries where life cycle assessments (LCAs) and non‑financial risk data are important for operational decisions.

Best fit: Manufacturers and heavy industries needing detailed value chain modelling.

Tool 7 – IBM Envizi

Overview & how it works: Envizi provides enterprise‑level analytics for Scope 3 emissions, integrating with large data systems to track emissions across all categories. Its strength lies in data consolidation and analytics at scale, making it easier for large organisations to handle complex reporting requirements.

Best fit: Large enterprises with complex IT ecosystems and sophisticated data needs.

Tool 8 – Sinai Technologies

Overview & how it works: Sinai specialises in carbon management with detailed Scope 3 data collection and reporting tools. It emphasises supplier integration and clean data sharing to build complete inventories.

Best fit: Companies seeking a balance between detailed emissions insight and supplier engagement.

Comparing Tools: Accuracy, Usability, Cost

Recommendations for Implementation

1. Start with a clear goal.
Decide whether you need audit‑ready disclosures, internal insights for reduction, or supplier engagement first, tools vary in strength.

2. Engage your suppliers early.
Scope 3 depends heavily on external data. Collaborative tools like Sweep or Salesforce Net Zero Cloud help reduce friction.

3. Build iteratively.
You don’t need perfect data on day one. Many platforms allow you to start with estimates and improve quality over time.

4. Align with standards.
Ensure your tool supports the GHG Protocol Scope 3 standard (the global best practice) to make your reports more reliable and consistent.


TO BE COMPLETED WITH ECOOS DATA AND THEN REVISED THE CONCLUSION