Formist vs Persefoni
Formist vs Persefoni
Persefoni is a carbon accounting platform with a free single user tier, a report builder for CSRD, ISSB and CDP, and a long list of security certifications. Formist is an agent that reads your documents and produces the regulated output, including CBAM and ISO 14083 reports.
Last checked October 2026
| Formist | Persefoni | |
|---|---|---|
| Scope 1, 2 and 3 inventory | YesBuilds a GHG Protocol inventory workbook with a year over year comparison.[1] | YesScope 1, 2 and 3, all 15 categories.[2] |
| CSRD and ESRS | YesMaps ESRS datapoints, runs the gap analysis and produces the data collection templates.[3] | YesA Sustainability Report Builder for frameworks like CSRD and ISSB.[2] |
| CDP response | YesPre-populates and validates the CDP corporate questionnaire, ready for upload.[4] | YesThe report builder lists CDP among its frameworks.[2] |
| CBAM declaration | YesCalculates embedded emissions and drafts a validated CBAM declaration package.[5] | Not listed on their siteCBAM is not among the features on Persefoni’s pricing page.[2] |
| Product footprint and LCA | PartlyA Tier 1 screening LCA, cradle to gate, from Bill of Materials data.[6] | PartlyMapping spend to LCA emission factors is marked coming soon.[7] |
| ISO 14083 transport emissions | YesFiles the ISO 14083:2023 report across road, rail, air, sea and multimodal legs.[8] | Not listed on their siteISO 14083 is not among the features on Persefoni’s pricing page.[2] |
| Works inside Claude, ChatGPT and other MCP clients | YesFormist is an MCP server: connect it once and your assistant gains every skill.[9] | PartlyData APIs are listed in the Advanced tier; an MCP connector is not listed.[2] |
When Persefoni is the better choice
- You want to start free: Persefoni Pro has no charge for a single user.
- Your procurement team needs published SOC 2, ISO 27001 and ISO 42001 certifications, which Persefoni lists.
- Your focus is a financial grade carbon ledger, for example financed emissions.
When Formist is the better choice
- You file CBAM or ISO 14083 reports as well as a GHG inventory.
- You want the AI to produce the filing itself from your documents, not only a chat assistant beside the data.
- You want to work from Claude, ChatGPT or your team’s chat rather than a new platform.
Questions buyers ask
- Is Formist a Persefoni alternative?
- For teams that file several frameworks from documents, including CBAM and ISO 14083, yes. For a free single user carbon ledger with extensive certifications, Persefoni is the natural choice.
- What does “not listed on their site” mean?
- We read the page cited for that row and did not find the feature. It does not mean the product cannot do it. Ask the vendor if it matters to you.
- Does Formist publish security certifications?
- Not on this site today. Ask us for our security documentation as part of a walkthrough.
See Formist on your own documents
Tell us which frameworks you report on and we will walk you through a filing.
Sources
Each mark in the table cites one of these public pages. Products change, so read the source before you rely on a row.
- Formist GHG Protocol skill read on
- Persefoni Pricing read on
- Formist CSRD / ESRS skill read on
- Formist CDP questionnaire skill read on
- Formist Formist Green: sustainability AI read on
- Formist LCA screening skill read on
- Persefoni Home read on
- Formist ISO 14083 skill read on
- Formist Connect Formist to your AI assistant read on
If something here is out of date or wrong, tell us through the contact page and we will correct it.