Scope 3 emissions make up the majority of most companies’ carbon footprint. They are also the least structured, the least standardized, and the hardest to verify.
That complexity is now being surfaced. Regulations such as CSRD and California’s SB-253 require companies to report value chain emissions with increasing levels of detail. At the same time, investors and customers are asking for data that can be traced back to source inputs, not estimates assembled at reporting time.
This changes how Scope 3 needs to be managed.
Spend-based estimates and disconnected spreadsheets create gaps in methodology and make it difficult to explain how numbers were derived. Those gaps become visible during reporting, benchmarking, or assurance.
Scope 3 software is being used to address this. These platforms connect supplier data, activity data, and emissions factors into a structured system that can support both reporting and reduction over time.
This guide covers the leading Scope 3 platforms in 2026 and how they are used in practice across large organizations.
💡 How are the best sustainability teams tracking Scope 3 using software? Our practical guide walks you through it step-by-step.
The best Scope 3 software for 2025
These platforms offer the strongest capabilities for managing Scope 3 emissions across large, complex organizations.
1. Pulsora
What it is
Pulsora is an enterprise sustainability and carbon management platform designed to manage Scope 3 emissions as part of a broader system for ESG and carbon data. The platform uses a connected data model to link suppliers, activities, emissions factors, and reporting frameworks.
How the platform is used
Teams use Pulsora to collect supplier and activity data across all 15 Scope 3 categories, structure that data at the entity and value chain level, and map it to disclosure frameworks. It is typically used in environments where supplier engagement, data validation, and auditability are required.
Core capabilities
- Coverage across all 15 Scope 3 categories
- Supplier engagement workflows across multiple tiers
- Activity-based and custom emissions factor modeling
- Data validation, approvals, and audit trails
- Integration with broader ESG and carbon reporting workflows
- Scenario modeling tied to operational and supplier data
- AI-supported data mapping and anomaly detection within structured datasets
Clients
ASM, Workday, Charles Taylor, Şişecam
2. Sweep
What it is
Sweep is a sustainability data platform focused on emissions tracking across distributed teams and value chains.
How the platform is used
Teams use Sweep to collect Scope 3 data from internal stakeholders and suppliers, centralize that data, and share it across reporting and sustainability teams.
Core capabilities
- Scope 1, 2, and 3 emissions tracking
- Supplier and value chain data collection
- Collaborative data input across teams
- Visualization and reporting dashboards
- Scenario modeling for emissions reduction
- Alignment with sustainability reporting frameworks
Clients
Royal Canin, Sanofi, Swisscom, Bouygues
3. Sphera
What it is
Sphera provides sustainability and risk management software with a focus on lifecycle assessment and environmental performance.
How the platform is used
Organizations use Sphera to calculate Scope 3 emissions through lifecycle analysis, identify emissions hotspots, and connect sustainability metrics with operational and risk systems.
Core capabilities
- Lifecycle assessment (LCA) across products and supply chains
- Scope 3 emissions modeling based on product and material data
- Carbon hotspot identification
- Integration with EHS and risk management systems
- Emissions reduction tracking across operations and supply chains
Clients
Texaco, Dow, Siemens, Kinder Morgan
4. Watershed
What it is
Watershed provides a carbon management platform focused on emissions measurement, reporting, and decarbonization across enterprise operations.
How the platform is used
Teams use Watershed to collect Scope 3 data, calculate emissions across value chains, and prepare disclosures aligned with reporting frameworks.
Core capabilities
- Scope 1, 2, and 3 emissions tracking
- Supplier and activity-based data collection
- Lifecycle emissions modeling
- Reporting aligned with CDP and SBTi
- Centralized dashboards for emissions visibility
- Support for disclosure preparation and reporting workflows
Clients
KKR, Dollar Tree, Roche, Etsy
5. Persefoni
What it is
Persefoni provides carbon accounting software focused on emissions measurement and climate disclosure.
How the platform is used
Organizations use Persefoni to calculate Scope 3 emissions, manage disclosures, and align carbon data with regulatory and voluntary frameworks.
Core capabilities
- Scope 1, 2, and 3 emissions calculations
- Emissions factor application across categories
- Scenario modeling for climate targets
- Audit-ready reporting workflows
- Data validation and error detection
Clients
Burlington, TPG, Wesco, Regency Centers
6. Microsoft
What it is
Microsoft Cloud for Sustainability includes emissions tracking as part of its broader ESG data platform, integrated within Azure and enterprise data systems.
How the platform is used
Organizations use Microsoft Sustainability Manager to ingest supplier and operational data, calculate emissions, and integrate sustainability reporting into existing enterprise infrastructure.
Core capabilities
- Scope 1 and 2 tracking with expanding Scope 3 capabilities
- Integration with enterprise data systems and Azure
- Supplier data ingestion and analysis
- Emissions calculation and reporting modules
- Copilot-assisted data interaction and reporting
Clients
HTC, Cosmo, Las Vegas Raiders, Kingfisher
7. Greenly
What it is
Greenly provides carbon accounting software designed for companies building emissions tracking and reporting capabilities.
How the platform is used
Teams use Greenly to estimate and calculate Scope 3 emissions, collect supplier data, and generate reports aligned with sustainability frameworks.
Core capabilities
- Scope 1, 2, and 3 emissions tracking
- Spend-based and activity-based estimation methods
- Automated data collection workflows
- Benchmarking against industry emissions data
- Reporting aligned with ESG frameworks
Clients
Ubisoft, Huawei, Pernod Ricard, The Fork
8. Plan A
What it is
Plan A is a sustainability platform focused on carbon accounting, emissions reduction, and regulatory reporting.
How the platform is used
Organizations use Plan A to measure Scope 3 emissions, engage suppliers, and model reduction strategies tied to financial and procurement decisions.
Core capabilities
- Scope 1, 2, and 3 emissions tracking
- Supplier engagement workflows
- Scenario modeling for emissions reduction
- Integration with ESG reporting requirements
- Target setting and tracking aligned with climate goals
Clients
Payhawk, Sorare, Blisce, KFC
What is Scope 3 software for carbon management?
Scope 3 software refers to platforms built specifically to calculate, track, and manage value chain emissions. These are the indirect greenhouse gas (GHG) emissions not owned or controlled by the reporting company — from upstream suppliers to downstream logistics and product use.
According to the Greenhouse Gas Protocol, Scope 3 emissions are broken down into 15 categories, including business travel, employee commuting, purchased goods and services, investments, use of sold products, and end-of-life product treatment.
Many software solutions offer Scope 3 capabilities as part of broader carbon accounting software, but the best tools go further: they integrate supplier data, offer deeper and more granular visibility to stakeholders, and support both calculation and reduction strategies to support your decarbonization initiatives.
💡 See also: The 15 best carbon accounting software tools in 2025
What to look for in Scope 3 emissions software
Not all platforms are built to handle the complexity of Scope 3. When evaluating solutions, prioritize the following:
Full Scope 1, 2, and 3 coverage
Scope 3 can’t be managed in isolation. Choose a platform that integrates all Scopes for emissions reporting and for unified GHG inventory management and scenario planning.
Category-level tracking and emissions factor control
Ensure the tool supports all 15 Scope 3 categories and allows you to adjust emissions factors using standard or custom data at the activity level.
The platform should have robust AI and automation driven emissions factor management tools to ensure that users don’t have to select individual factors, and can promote consistency by selecting EF datasets for use by facility or region.
Supplier engagement tools
The best Scope 3 software platforms go beyond basic data requests — they’re built to support end-to-end supplier collaboration.
Look for tools that help you prioritize high-impact suppliers for engagement based on emissions relevance, spend, or geography. Top solutions provide benchmarking dashboards to compare supplier performance, automated outreach with reminders to reduce manual follow-ups, and frictionless access with simplified login options.
To ensure supplier participation and data quality, leading platforms also offer embedded training modules and guidance resources for suppliers who may lack GHG reporting experience, helping build capacity across your value chain.
Intelligent gap-filling and estimation
Because primary emissions data is often incomplete, especially across global supply chains, Scope 3 software should offer intelligent gap-filling capabilities to ensure reporting continuity. They use hybrid calculation methods, including spend-based estimations, proxy activity data, and emissions factor databases (like EPA or DEFRA) to fill in missing values.
The best tools clearly flag estimated data, maintain full audit trails, and allow for easy replacement with actual supplier or activity-level inputs as your data maturity improves. This functionality is essential for producing a comprehensive, accurate, and standards-aligned emissions inventory even when perfect data isn’t available.
Standards alignment (GHG Protocol, CSRD, SBTi, etc.)
Audit-readiness is a must. Choose software that aligns with key frameworks and outputs reporting packages for the CSRD, CDP, SBTi, and CA SB 253, and the NY Climate Bill, among others.
Integration and scalability
Enterprise-grade Scope 3 software should seamlessly connect with your existing systems — including ERP, procurement, utility, and supply chain platforms — to centralize emissions data and eliminate silos.
But integration is only part of the story.
As regulations evolve, emissions boundaries shift, and sustainability programs mature, your software needs to keep up. Look for platforms that can scale from a single pilot facility to global operations, accommodate increasing data volume and granularity, and adapt to new frameworks or disclosure requirements.
Future-proof tools will offer flexible data models, open APIs, and regular updates to support your sustainability journey over time — not just your immediate needs.
Decarbonization tools
Scope 3 data is only valuable if it drives meaningful action.
Leading platforms go beyond measurement to offer decarbonization tools like emissions hotspot analysis, scenario modeling, and SBTi-aligned reduction planning. Users can simulate the impact of supplier changes, material substitutions, or localized sourcing strategies, then benchmark progress over time.
Some platforms also include internal carbon pricing models, marginal abatement cost curves, and AI-powered recommendations to help prioritize the most cost-effective interventions across the value chain.
Why you need a platform that manages Scope 1, 2, and 3
Scope 3 is only one piece of the puzzle. Fragmented systems create duplicate efforts, inconsistent methodologies, and reporting blind spots.
Integrated platforms that track across all emissions sources solve for:
- Data consistency across all emissions scopes and categories
- Auditability via traceable calculations and centralized records
- Strategic modeling, including decarbonization planning that spans facilities and suppliers and supports tracking SBTi goals
- Efficiency through unified data collection workflows and approvals
- Visibility through analytics dashboards for benchmarking and hotspots as well as streamlined reporting workflows
Net zero can’t happen without end-to-end emissions visibility. Choosing a tool that spans all three scopes avoids rework and ensures accountability at every level of your organization.
How Scope 3 software helps with emissions reduction
While calculating emissions is foundational, reduction is the ultimate goal. Scope 3 software supports this through:
Hotspot analysis
Identify which suppliers, geographies, or product lines drive the most GHG emissions. Benchmarking and normalizing these values on an intensity basis can support uncovering low hanging fruit for decarbonization.
Scenario modeling
Forecast carbon reductions based on switching materials, localizing suppliers, or improving logistics. With advanced scenario modeling, sustainability teams can have confidence in their corporate decarbonization plans and know that their work is making a real impact.
Target tracking
Align reductions to science-based targets and monitor progress in real time. This is a key point of overlap for risk and compliance teams with sustainability teams especially if goals and targets have been announced publicly.
Supplier insights
Scope 3 software helps procurement and sustainability teams identify high-impact suppliers, benchmark emissions performance, and prioritize engagement based on risk or spend.
Leading Scope 3 emissions software makes collaboration easier with automated data requests, simplified logins, and built-in dashboards to track supplier progress. Many also include training resources to support suppliers without GHG reporting experience. Together, these tools enable more effective, scalable partnerships to drive measurable emissions reductions across the value chain.
How Scope 3 software supports corporate sustainability reporting
Meeting both mandatory regulatory requirements and voluntary ESG reporting requirements, from CDP to CA SB 253, means Scope 3 emissions are no longer optional in disclosures.
But even more importantly than meeting reporting standards, having access to Scope 3 data can give enterprises an idea of their environmental impact. Investors, regulators, and consumers alike all expect companies to have and be working toward meeting sustainability goals, and they respond in kind with their wallets. In fact, 78% of consumers demand sustainability when purchasing goods and services.
Modern Scope 3 emissions software automates and strengthens corporate sustainability reporting and better sustainability management by:
- Pre-integration with ESG data management, papping scopes and categories directly to disclosure requirements
- Exporting audit-ready documentation (emission factors, calculation methods, activity data)
- Enabling real-time updates as data changes
- Providing transparency and traceability down to the facility or supplier level so that you can comply with reporting requirements for any level of jurisdiction
How it helps manage supply chain emissions
Scope 3 is, at its core, a supply chain problem. Software helps organizations identify and prioritize high-impact suppliers and send data requests and integrate responses automatically.
Software scores supplier performance and tracks optimization opportunities and improvements, creating shared emissions inventories or collaborative reduction plans.
Advanced Scope 3 platforms turn your supply chain from a data gap into a decarbonization lever.
Scope 3 software isn’t just for reporting — it’s for results
The most impactful companies aren’t just measuring Scope 3 emissions — they’re managing them.
From supplier data pipelines to SBTi-aligned targets, Scope 3 software platforms are evolving from reporting tools into strategy engines. They help sustainability teams move beyond compliance and into continuous improvement.
If you’re still trying to wrangle spreadsheets or looking to expand beyond tracking Scopes 1 and 2, 2025 is the year to upgrade.
Pulsora is the top pick for enterprises looking to unify emissions data, reduce friction with suppliers, and drive measurable climate outcomes across all 3 scopes. With automated calculations, embedded analytics, and future-proof compliance capabilities, it’s more than a tool — it’s a platform for climate action.
Explore Pulsora’s Scope 3 solutions by requesting a personalized demo today.
