Side by side
Energy Star Portfolio Manager vs Persefoni
Both stand on environmental, energy & sustainability software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan
Visit Energy Star Portfolio Manager 
Free plan APIWeb
Persefoni combines emissions accounting coverage with guided disclosure tools and anomaly detection. The free Pro plan has clear user and reporting limits, while Advanced pricing is available by demo request.
Visit PersefoniThe facts
| Energy Star Portfolio Manager | Persefoni | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Not published | API, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 2 |
| Maker | U.S. Environmental Protection Agency | Not published |
| Website | energystar.gov | persefoni.com |
| On environmental, energy & sustainability software | #4 of 19 | #1 of 19 |
Energy Star Portfolio Manager: what it does well
Persefoni: what it does well
- Free Pro plan with unlimited assets and historical years
- Covers Scope 1, 2, and all 15 Scope 3 categories
- Guided disclosures for CSRD, ISSB, and CDP
- Copilot support and AI anomaly detection
- Both plans list four security certifications
What to know first
- Pro is limited to one user
- Detailed GHG Metrics Reports are not included in Pro
- Advanced pricing requires a demo request
- Concierge Support is a paid upgrade
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