# Coolset vs Persefoni: which do AI models recommend for ESG and carbon reporting, September 2026

Finance AI Recommendation Index, September 2026 Edition, ESG and carbon reporting. Zero of twelve models named Coolset first on the direct prompt; zero named Persefoni. Page: https://finance-ai-index.com/corporate/esg-and-carbon-reporting/coolset-vs-persefoni/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Coolset | 8% | #5 of 15 | 0% | 19 | 10 of 12 |
| Persefoni | 6% | #7 of 15 | 4% | 28 | 12 of 12 |

## The direct prompt, model by model

- Gemini 3.5 Flash: neither first, one named (first choices: Greenly, Sweep) (alternatives: Coolset, Novata)
- Grok 4.1 Fast: neither first, one named (first choices: Sweep) (alternatives: Coolset, Novisto)
- Mistral Small: neither first, one named (first choices: Sweep) (alternatives: Coolset, EcoOnline ESG)
- DeepSeek V4 Flash: neither first, one named (first choices: Sweep) (alternatives: Coolset, Greenly, Plan A, Tanso)
- Kimi K2: neither first, one named (first choices: Novisto) (alternatives: Coolset, Sustain.Life, Sweep, Workiva)
- MiniMax M2.5: neither first, one named (first choices: EcoOnline ESG, Sweep) (alternatives: Coolset, Normative, Novisto, Plan A)
- Claude Haiku 4.5: neither named (first choices: EcoOnline ESG) (alternatives: Greenstone, Normative, Sphera, Sweep)
- GPT-5.4 mini: neither named (first choices: Workiva) (alternatives: IBM Envizi, Novisto, Sphera)
- Perplexity Sonar: neither named (first choices: Novisto) (alternatives: EcoOnline ESG, Greenly, Novata, Sweep)
- Llama 4 Maverick: neither named (first choices: EcoOnline ESG, Novisto, Sweep)
- Qwen 3.7 Flash: neither named (first choices: Novisto) (alternatives: Gravity, LogicGate, Sweep)
- GLM 4.7 FlashX: neither named (first choices: Novisto) (alternatives: EcoOnline ESG, Greenly, Sustain.Life, Sweep)

## What the models said about Coolset

- "Coolset is frequently cited as the "go-to" for mid-market companies... Choose Coolset if you are in Europe and need strict regulatory compliance (CSRD)" (Qwen 3.7 Flash, paraphrase prompt, first choice)
- "Prioritize platforms suited for 500–5,000 employees, like Coolset, ESG:ONE, EcoOnline, or Novisto... Shortlist 3–5: Coolset (multi-framework, AI)" (Grok 4.1 Fast, scale prompt, first choice)
- "Sweep / Coolset / Plan A / ESG:ONE: These are specifically built for upper-mid-market companies." (Gemini 3.5 Flash, scale prompt, first choice)

## What the models said about Persefoni

- "Enterprise-grade platforms (like *Workiva*, *IBM Envizi*, or *Persefoni*) are usually overkill" (Gemini 3.5 Flash, scale prompt, soft negative)
- "I'd choose Persefoni because it has a free single-user tier and is repeatedly positioned as the cheapest starting point" (Perplexity Sonar, budget prompt, first choice)
- "### 1. Persefoni Pro (Free) ... Start with Persefoni's free tier" (MiniMax M2.5, budget prompt, first choice)
- "Top Recommendation: Persefoni ... robust free tier" (Qwen 3.7 Flash, budget prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.