# ESG and carbon reporting for small business buyers: what AI models recommend, September 2026

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

**Standing:** Greenly leads with 41% of first choices; verdict clear leader. 46 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| # | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | Greenly | 41% | 4% | 47 |
| 2 | ExecutESG | 13% | 0% | 12 |
| 3 | Sustain.Life | 9% | 6% | 18 |
| 4 | Persefoni | 9% | 35% | 20 |
| 5 | Wardn | 7% | 0% | 19 |
| 6 | Aclymate | 4% | 0% | 11 |
| 7 | Coolset | 0% | 14% | 14 |
| 8 | Sweep | 0% | 27% | 15 |
| 9 | Novisto | 0% | 60% | 10 |
| 10 | Diligent ESG | 0% | 80% | 10 |
| 11 | Watershed | 0% | 82% | 11 |
| 12 | IBM Envizi | 0% | 100% | 13 |

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

- Claude Haiku 4.5: Greenly; alternatives ESGenius!, today.green
- GPT-5.4 mini: KEY ESG, Tekmon; alternatives Precoro ESG
- Gemini 3.5 Flash: Greenly, Sustain.Life; alternatives Aclymate, Climate Essentials, Coolset, Seedling
- Perplexity Sonar: Greenly; alternatives Aclymate
- Grok 4.1 Fast: Code Gaia; alternatives Greenly, Wardn
- Mistral Small: Greenly, Wardn
- DeepSeek V4 Flash: Greenly; alternatives ExecutESG, GreenScore
- Llama 4 Maverick: no first choice
- Qwen 3.7 Flash: Greenly, Wardn; alternatives Normative, Persefoni
- Kimi K2: Greenly, Multiplye; alternatives Plan A, Sweep
- GLM 4.7 FlashX: Greenly; alternatives Emerald Power, Esgrid, ExecutESG, Greenomy
- MiniMax M2.5: Wardn; alternatives Greenly, Sustain.Life

## Sources the answers cite

66 of 72 answers came back with a source list, from 12 of 12 models. Sites named in the most answers:

- gartner.com: 30 answers, 30 citations
- coolset.com: 29 answers, 35 citations
- guideflow.com: 27 answers, 27 citations
- g2.com: 26 answers, 37 citations
- wardn.com: 25 answers, 42 citations
- onestopesg.com: 20 answers, 24 citations
- executesg.com: 19 answers, 36 citations
- climefy.com: 17 answers, 17 citations

Pages named in the most answers:

- https://gartner.com/reviews/market/esg-management-and-reporting-software (28 answers)
- https://coolset.com/academy/best-esg-reporting-software-tools (27 answers)
- https://guideflow.com/blog/esg-reporting-software (27 answers)
- https://wardn.com/blog/best-esg-software-for-smbs (19 answers)
- https://g2.com/categories/environmental-social-and-governance-esg-reporting/small-business (18 answers)
- https://climefy.com/blog/top-5-esg-compliance-software (17 answers)
- https://executesg.com/resources/blog/esg-software-pricing-2026 (16 answers)
- https://onestopesg.com/esg-resources/best-esg-reporting-software (15 answers)
- https://tracera.com/best-esg-software-platforms (13 answers)
- https://f6s.com/software/category/sme-esg-reporting (12 answers)

## Warned against

- Workiva: 26 of 27 labels negative. "Avoid: Massive, blank-canvas enterprise tools (like Workiva or CCH Tagetik)... avoid large-enterprise solutions (like Workiva, Diligent, or Sphera)" (Gemini 3.5 Flash, scale prompt)
- IBM Envizi: 13 of 13 labels negative. "G2 reviewers consistently cite high cost and a difficult setup process as major barriers for smaller organizations." (DeepSeek V4 Flash, negative prompt)
- Diligent ESG: 8 of 10 labels negative. "Enterprise tools (Workiva, Diligent, Envizi, Watershed) run $30k–$400k/yr — completely out of your league." (DeepSeek V4 Flash, scale prompt)
- Sphera: 8 of 8 labels negative. "Why to avoid: Sphera explicitly targets organizations with 5,000+ employees ... making it a poor fit for a small business" (GLM 4.7 FlashX, negative prompt)

## 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, September 2026 Edition, finance-ai-index.com.