# ESG and carbon reporting: what AI models recommend, October 2026

Finance AI Recommendation Index, October 2026 Edition. Asked as "ESG reporting software" and as "carbon accounting platform", six framings each, to fourteen models with search on, on behalf of a mid-market B2B company. Page: https://finance-ai-index.com/corporate/esg-and-carbon-reporting/

**Standing:** Greenly leads with 36% of first choices; verdict contested. 59 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | Greenly | 36% | 6% | 36 |
| 2 | Sweep | 10% | 4% | 23 |
| 3 | Coolset | 7% | 9% | 11 |
| 4 | Persefoni | 5% | 3% | 30 |
| 5 | Watershed | 3% | 23% | 30 |
| 6 | Novisto | 3% | 7% | 14 |
| 7 | Plan A | 3% | 0% | 11 |
| 8 | Workiva | 3% | 40% | 30 |
| 9 | Novata | 2% | 0% | 12 |
| 10 | Microsoft Cloud for Sustainability | 0% | 8% | 13 |
| 11 | Normative | 0% | 14% | 14 |
| 12 | Sphera | 0% | 18% | 11 |

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: EcoOnline ESG; alternatives Coolset, Novata, Sweep
- GPT-5.4 mini: Workiva; alternatives Credibl ESG, IBM Envizi, Microsoft Cloud for Sustainability
- Gemini 3.5 Flash: Coolset, Greenly; alternatives Gravity, KEY ESG, Novata, Sweep
- Perplexity Sonar: Greenly; alternatives EcoOnline ESG, Novata, Novisto, Sweep
- Grok 4.1 Fast: Greenly, Sweep; alternatives Horizon ESG, cubemos
- Mistral Small: Sweep; alternatives EcoOnline ESG, Novata
- DeepSeek V4 Flash: Sweep; alternatives Coolset, Greenly, Novisto
- Llama 4 Maverick: Sweep; alternatives EcoOnline ESG, Novata
- Qwen 3.7 Flash: Watershed; alternatives Carbon Cloud, Enablon, Persefoni, PlanA
- Kimi K2: Novata, Position Green; alternatives Greenly, Novisto, Workiva
- GLM 4.7 FlashX: Workiva; alternatives Greenly, Measurabl, Novisto, Persefoni
- MiniMax M2.5: Plan A, Sweep; alternatives EcoOnline ESG, Novata
- GPT-6 Luna: Greenly; alternatives Novisto, Workiva
- Muse Glimmer 30B: Novisto, Sweep; alternatives Coolset, Novata

## Sources the answers cite

77 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- onestopesg.com: 41 answers, 48 citations
- guideflow.com: 29 answers, 39 citations
- coolset.com: 27 answers, 27 citations
- fanruan.com: 26 answers, 33 citations
- g2.com: 21 answers, 46 citations
- persefoni.com: 17 answers, 20 citations
- techtarget.com: 17 answers, 18 citations
- manglai.io: 15 answers, 16 citations

Pages named in the most answers:

- https://guideflow.com/blog/esg-reporting-software (27 answers)
- https://onestopesg.com/esg-resources/best-esg-reporting-software (25 answers)
- https://coolset.com/academy/best-esg-reporting-software-tools (22 answers)
- https://fanruan.com/en/blog/top-sustainability-reporting-tools (18 answers)
- https://tracera.com/best-esg-software-platforms (15 answers)
- https://emissiontwin.com/blog/best-esg-reporting-software (12 answers)
- https://csr-tools.com/en/blog-en/top-8-esg-software-solutions-for-more-sustainability-in-2024 (11 answers)
- https://pulsora.com/blog/best-esg-reporting-software (10 answers)
- https://councilfire.org/guides/top-5-esg-frameworks-for-smes (9 answers)
- https://energycap.com/blog/sustainability-reporting-platform (9 answers)

## Warned against

- Workiva: 12 of 30 labels negative. "Avoid paying for enterprise platforms like Workiva unless you have complex disclosure, assurance, or multi-framework requirements" (Perplexity Sonar, budget prompt)
- Watershed: 7 of 30 labels negative. "What to Avoid - Watershed — Excellent but typically over $50K–$250K/year; better suited for large enterprises" (Kimi K2, paraphrase prompt)
- IBM Envizi: 6 of 17 labels negative. "Avoid massive enterprise platforms (like Salesforce Net Zero Cloud or IBM Envizi)" (Gemini 3.5 Flash, scale prompt)
- MSCI: 3 of 5 labels negative. "MSCI's 40/30/30 weighting (Environmental/Social/Governance) can overemphasize environmental factors, potentially masking social and governance risks" (Claude Haiku 4.5, negative prompt)

## Movement since September 2026

Floor: 10 points of share, measured on the calibration repeat.
New leader: Sweep (25%) to Greenly (33%). Margin 24 points, beyond the floor.

- Greenly: 13% to 33%, +20. Cleared the floor by 10 points · rank 2 → 1 of 96.
- Sweep: 25% to 10%, −15. Cleared the floor by 5 points · rank 1 → 2 of 96.
- Novisto: 10% to 2%, −8. Inside the floor by 2 points · rank 3 → 11 of 96.
- EcoOnline ESG: 8% to 2%, −6. Inside the floor by 4 points · rank 6 → 12 of 96.
- Plan A: 10% to 4%, −6. Inside the floor by 4 points · rank 4 → 6 of 96.
- Watershed: 0% to 4%, +4. Inside the floor by 6 points · rank 15 → 5 of 96.
- Novata: 0% to 2%, +2. Inside the floor by 8 points · rank 22 → 10 of 96.
- Persefoni: 6% to 4%, −2. Inside the floor by 8 points · rank 7 → 4 of 96.
- Coolset: 8% to 8%, ±0. Inside the floor by 10 points · rank 5 → 3 of 96.
- Workiva: 4% to 4%, ±0. Inside the floor by 10 points · rank 9 → 7 of 96.
- Microsoft Cloud for Sustainability: 0% to 0%, ±0. Inside the floor by 10 points · rank 67 → 23 of 96.
- Normative: 0% to 0%, ±0. Inside the floor by 10 points · rank 18 → 24 of 96.

## Record

- Method: https://finance-ai-index.com/methodology/
- Raw judge labels and full responses: https://finance-ai-index.com/data/
- License: CC BY 4.0. Cite as Finance AI Recommendation Index, October 2026 Edition, finance-ai-index.com.