Carbon accounting · Persefoni AI, Inc.

Persefoni

Climate management platform with a free tier for Scope 1-3 emissions calculation and CSRD, ISSB and CDP reporting.

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Persefoni is a carbon accounting and climate disclosure platform that calculates Scope 1, 2 and 3 emissions and turns the results into reports mapped to CSRD, ISSB and CDP requirements. Its free PRO plan targets a single user running an annual calculation, while the Advanced plan adds unlimited users, custom calculation frequency, and decarbonization scenario modeling for larger, more complex organizations. An AI Copilot assists with data mapping and factor selection, and the platform is SOC 2 compliant with an audit trail intended to support third-party assurance. Persefoni positions itself between free carbon calculators and fully bespoke enterprise consultancies, competing most directly with Watershed and Normative for mid-market and enterprise finance and sustainability teams building standards-aligned inventories.

At a glance

Vendor Persefoni AI, Inc.
Pricing model Free tier + paid plans
Free tier Yes
Deployment Cloud
Open source No
Best for Companies wanting a free entry point into standards-aligned carbon accounting before scaling to enterprise features.

Pricing

PRO is free for a single user with annual calculations; Advanced is custom-priced for multi-user, higher-frequency use.

Plan Price Notes
PRO Free Single user, annual calculation frequency, no credit card required
Advanced Custom pricing Unlimited users, custom calculation frequency, decarbonization modeling

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Features

  • Scope 1, 2 and 3 emissions calculation engine
  • AI-assisted data mapping and Copilot assistant
  • Sustainability Report Builder for CSRD, ISSB and CDP
  • Decarbonization scenario modeling (Advanced)
  • SOC 2-compliant data handling
  • Emission factor library aligned to the GHG Protocol
  • Audit trail for assurance-ready reporting

Profile last reviewed September 21, 2026

Head to head

Alternatives

Watershed Enterprise carbon accounting platform that models Scope 1-3 emissions from existing business data and tracks reduction programs. Normative Swedish carbon accounting platform with Essential and Premium plans covering emissions calculation and value-chain engagement. Climatiq Emission factor database and calculation API that developers embed into products for carbon footprint calculations.

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Terms to know

Data quality The degree to which data is accurate, complete, consistent and fit for the purpose it is being used for. KPI (key performance indicator) A measurable value tracked over time to show whether a team or process is on track toward a goal. AI copilot An AI tool embedded in a work application that assists a human with suggestions or drafts, rather than working unsupervised. Carbon accounting Measuring, tracking and reporting an organization's greenhouse gas emissions in standardized units of CO2-equivalent. Emissions factor A standard value converting a unit of activity, such as fuel burned, into the greenhouse gases it produces. Scenario modeling Building several named versions of a financial plan, such as best, base, and worst case, under different assumptions.

Related guides

How to choose a carbon accounting tool Pick a carbon accounting tool by data strategy, Scope 3 depth and which compliance frameworks it maps to, not by the dashboard. How to measure a company's carbon footprint Scopes 1 to 3, where emission factors come from, and the data-collection work that determines whether the number is defensible.