Persefoni

Persefoni is carbon-accounting and sustainability-disclosure software for organizations that need a structured way to measure emissions and prepare climate reporting. Pro suits a lower-complexity business with one person responsible for the work, while larger sustainability teams should consider Advanced. Its strongest case is unusually broad Scope 1–3 coverage paired with disclosure workflows; its main constraint is how quickly the free plan’s single-seat and reporting limits become restrictive.

Overview

Persefoni combines emissions measurement, data collection, and sustainability disclosures in one web and API platform. Pro and Advanced cover Scope 1, Scope 2, and all 15 Scope 3 categories, so the product can address value-chain accounting as well as an organization’s direct footprint. Supplier engagement and an audit trail are supported, useful when emissions data must be collected from partners and changes need to remain traceable.

The Sustainability Report Builder structures disclosures through qualitative questions and emissions data for CSRD, ISSB, and CDP frameworks. That connection between accounting and reporting is valuable for teams that would otherwise reconcile those workstreams manually. Pro’s single user, however, makes shared preparation difficult.

Key features

Accounting and disclosure

Both plans provide data collection and emissions factors across Scope 1–3. Pro includes unlimited assets and historical reporting years, giving a small organization room to build a multi-year record without an asset quota. It does not include detailed GHG Metrics Reports, and some GHG Metrics Reports are paid add-ons, so organizations needing deeper analysis may outgrow the free tier.

Automation and integrations

Persefoni Copilot provides in-app carbon-accounting support, while PersefoniAI can flag data anomalies. Natural-language emissions-factor mapping is listed as coming soon rather than as a current capability. The Integration Hub connects with Amazon Web Services, Concur, Expensify, Google Sheets, Navan, and utility providers. Advanced adds APIs and the Integration Hub for data ingestion, a more practical arrangement for enterprise data pipelines.

Security

Both plans list SOC 1 Type II, SOC 2 Type II, ISO 27001, and ISO 27017 compliance. The multi-tenant SaaS platform is hosted on AWS, with AES-256 encryption at rest and TLS 1.2 or above in transit. SAML single sign-on supports identity providers including Okta, Microsoft, and Ping; optional multifactor authentication and IP allow listings provide additional access controls. All users receive the Help Center, guides, and tutorials, while personalized Concierge Support costs extra.

Pricing

Persefoni Pro

Pro costs nothing. It is a self-service plan for one user, with unlimited assets and historical reporting years. The single-seat limit makes it appropriate for an owner or sustainability lead working independently, not a cross-functional reporting group. Detailed GHG Metrics Reports and Concierge Support are paid add-ons, reducing the free plan’s usefulness for organizations that need richer analysis or dedicated assistance. There is no free trial because the plan itself is free.

Persefoni Advanced

Advanced uses custom pricing by demo request and is aimed at sustainability-ambitious and enterprise-scale companies. It allows unlimited users and includes the APIs and Integration Hub for ingestion, making it the logical tier when several contributors or connected systems are required. Both plans retain the same broad Scope 1–3 coverage and listed security standards.

Platforms

Persefoni is offered through a web application and an API. The API emphasis is most relevant to Advanced customers building automated data flows; web access suits teams working directly in the platform.

Who it's for

Choose Pro if your organization has low to medium operational complexity, one person owns emissions accounting, and unlimited assets and historical years matter more than detailed metrics reporting. Choose Advanced when reporting is collaborative, data must enter through APIs or integrations, or the organization operates at enterprise scale. A company seeking a free multi-user workspace should look elsewhere.

Pros and cons

• Pro: Scope 1, Scope 2, and all 15 Scope 3 categories are covered on both plans, supporting comprehensive value-chain accounting.
• Pro: Guided CSRD, ISSB, and CDP workflows connect emissions data with disclosure preparation.
• Pro: Unlimited assets and historical reporting years avoid two common free-tier ceilings.
• Pro: Strong enterprise controls include SOC and ISO certifications, AWS hosting, encryption, SSO, optional MFA, and IP allow listings.
• Con: Pro is restricted to one user, which prevents genuine team collaboration without moving to Advanced.
• Con: Detailed GHG Metrics Reports and Concierge Support cost extra, weakening the free plan for analysis-heavy or support-dependent work.
• Con: Advanced pricing requires a demo request, so larger buyers cannot compare its cost directly.

Alternatives

For a broader directory of products, see Carbon Accounting Software.

• Carbonfact is the better fit when supplier-controlled environmental-data exchange or product life-cycle assessment is the priority; its Supplier plan is free and Product LCA uses custom pricing.
• CarbonInk suits someone wanting a completely local free tool with no account, cloud, or subscription on macOS or Windows.
• CarbonTool is worth choosing when a 30-day full-access trial and a published 2,000€-per-year Core plan are useful for evaluating a paid deployment.
• EcoReko fits a small web-based operation that wants a forever-free one-user, one-site plan with Scope 1, 2, and 3 tracking.
• Greenio is an option for users who want a free plan with unlimited data entry, four PDF reports per year, and AI recommendations.
• Hedgehog Carbon Platform is suited to a very small inventory limited to five emission sources, one user, and one entity on its free tier.
• Vaayu may suit organizations evaluating a paid carbon platform whose pricing is handled by request.
• Carbonstop Ccloud is the alternative for buyers specifically seeking paid enterprise software that can be self-hosted or used on the web.

Verdict

Persefoni is a strong choice for organizations that need complete Scope 1–3 accounting, guided CSRD, ISSB, or CDP disclosures, and enterprise-grade controls in one system. Start with Pro when one person can own the work and the reporting limits are acceptable; choose Advanced when unlimited users and connected ingestion are essential. Look elsewhere if you need a genuinely collaborative free plan, transparent enterprise pricing, or detailed metrics without paid add-ons.