Best Free Carbon Accounting Software
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Compare the Top Free Carbon Accounting Software as of June 2026
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What is Free Carbon Accounting Software?
Carbon accounting software helps organizations measure, track, manage, and report greenhouse gas (GHG) emissions across their operations, supply chains, products, and facilities. These platforms collect emissions data from multiple sources and calculate carbon footprints according to recognized frameworks such as the Greenhouse Gas Protocol, CDP, and various ESG reporting standards. The software often includes automated data collection, emissions factor libraries, Scope 1, Scope 2, and Scope 3 reporting, target tracking, and sustainability dashboards to support climate initiatives and regulatory compliance. Many carbon accounting solutions integrate with ERP, procurement, energy management, and ESG reporting systems to streamline environmental data management. By improving emissions visibility and reporting accuracy, carbon accounting software helps organizations meet sustainability goals, reduce environmental impact, and comply with evolving climate disclosure requirements. Compare and read user reviews of the best Free Carbon Accounting software currently available using the table below. This list is updated regularly.
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1
Greenly
Greenly
From understanding your carbon footprint to reducing your emissions, we’ll be there. Our team will guide you each step of the way. From onboarding to measuring your carbon footprint, to reduce it, all the way to communicate it with the public and your stakeholders. You don’t have to be a scientist to make a difference. Our climate experts will provide you with actionable steps to reducing your carbon footprint simply and easily. Activity-based & spend-based approaches are complementary and are essential to thoroughly assess your CO2 emissions. Accelerate your climate transition while reducing your team's workload with the world's first carbon footprinting solution. State-of-the-art technology coupled with a team of climate experts to support you at every stage of your company's transition to a sustainable model. We take everything into account to give you precise outcomes and we do it fast.Starting Price: $199 per month -
2
Dashe
Greenleaf TDG
Dashe is a real-time carbon tracking platform that replaces estimated emissions data with actual activity-based numbers. It tracks your carbon impact live across travel, sites, logistics, products, waste and digital - connecting to your existing systems so there's no manual data collection. Scope 1, 2 and 3 covered. The Dash3 module lets your supply chain share real emissions data directly into your reporting. Reports are auditable, tender-ready, and built to support decisions - not just tick a compliance box. Most organisations are live within a day. Built in Leeds for businesses tired of paying thousands for carbon reports that don't tell them anything useful.Starting Price: $15.25 -
3
Sweep
Sweep
Reduce carbon emissions in your business and value chain. Adjust your carbon program to your company and value-chain, not the other way around. Whether you think in products, divisions or locations, Sweep mirrors the way your business is organized, making it easy to assign and track tasks, and visualize every action in one place. It’s a flexible system that we call ‘trees’, and it powers every interaction on Sweep. From start-up to enterprise, Sweep scales to a limitless number of employees. And from single sign-on to advanced APIs, it works together with your existing infrastructure. Assign a part of your program with just one click – and give them access to all the tools they need to make a difference. Link your tree with other companies to securely exchange data and collaborate on a credible net zero journey across scopes 1, 2 and 3. -
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Persefoni
Persefoni
Persefoni’s SaaS Platform enables companies and financial institutions to easily meet stakeholder and regulatory climate disclosure requirements and requests. Calculating carbon footprints, meeting climate disclosure requests, and achieving net-zero used to be hard. With Persefoni you don’t need to be a technical expert. Just answer simple questions, upload your data, and our automated Persefoni Advisor™ will guide you through the process from beginning to end. You don’t need any pre-existing knowledge of climate disclosure frameworks or carbon accounting methodologies to get started with Persefoni. Included in your subscription is a rich suite of options for deployment and support. Choose between structured, expert-led roll-out support or completely self-service onboarding via an extensive library of how-to articles and videos in our knowledge base. -
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ESG Enterprise
ESG Enterprise
ESG Enterprise helps companies and investors improve investment decisions, better understand climate risks & opportunities, and carbon management, and compliance with ESG reporting. Starts with a freemium basic level and see for yourself how easy it is to start your ESG journey. With ESG all-encompassing SaaS tools and premium data, starting sustainable finance disclosure and supply chain human rights and environmental diligence has never been easier. ESG Enterprise is an Environmental, Social, and Governance software, SaaS, and data analytics company designed to help businesses, NGOs and governments reduce ESG risks, manage disruptions, and capture opportunities in the transition to a sustainable-growth, low-carbon economy.Starting Price: $59.99 per month -
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Nature Preserve
Nature Preserve
At Nature Preserve, we stand apart in our specialized focus tailored for food distribution and processing industries. This unique specialization enables us to offer unparalleled precision and relevance in our services. *Carbon footprint calculator - Use our food carbon footprint calculator to measure the CO2 emissions associated with your organization and products through Scope 1, 2, 3 analysis and life cycle assessments. Track energy, resource, land, and water use, and identify cost-saving strategies. *Reduce emission - Whether you're committing to Science-Based Targets or aiming to lower your emissions, we help you to set personalized and achievable emission reduction targets. Optimize energy use, improve water and land efficiency, and minimize waste. *Exclusive market access to premium buyers - We help you to confidently share your validated results with stakeholders through certificates, reports, and QR codes, highlighting both your environmental and operational benefits.
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