Here are top-rated AI-driven climate / carbon-accounting and reporting platforms (widely used by enterprises and reviewers in 2024–2025), with what each does best and when to pick it.

1. Watershed — enterprise carbon measurement, disclosure, and AI-accelerated reporting

• What it is: End-to-end platform for Scope 1–3 carbon accounting, corporate disclosure workflows, and decarbonization tracking; used by large companies and Fortune 500 customers. Watershed has added AI-accelerated reporting features for regulatory disclosures. (time.com)
• Strengths: Strong enterprise adoption, audit-grade Scope 1–3 measurement, disclosure builders for regulations, good for large orgs and public reporting.
• Best for: Large corporates that need rigorous, auditable carbon accounting plus regulatory disclosure support.

2. Persefoni — AI-driven carbon management and reporting for finance/enterprise users

• What it is: Carbon accounting and management platform that uses AI to streamline emissions measurement, scenario analysis, and ESG reporting; positioned for investor and regulatory alignment. (Sweep.net)
• Strengths: Finance-friendly workflows, strong controls and standard alignment, scaled for multi-entity enterprises.
• Best for: Companies needing finance-grade carbon accounting integrated with investor/board reporting.

3. Climatiq — API-first emissions data + AI to automate Scope 3/measurement

• What it is: Emissions data platform and API that automates collection and normalization of activity/emissions factors; emphasizes solving hard Scope 3 coverage with AI/data integration. Used by engineering-first teams. (businessinsider.com)
• Strengths: Developer-friendly API, large emissions factors coverage, good for automating product- or transaction-level emissions calculations.
• Best for: Tech teams / SaaS companies that want to integrate emissions calculations into products or workflows via APIs.

4. Greenly — real-time tracking and reporting for small-to-mid businesses

• What it is: Carbon tracking and ESG reporting tools with automated data connectors and dashboards; attractive for SMBs and mid-market. (Sweep.net)
• Strengths: Ease of use, quick setup, cost-effective for smaller teams.
• Best for: Small-to-medium organizations beginning formal climate reporting.

5. ZestyAI — AI-driven climate risk (property-level) analytics for insurers & risk managers

• What it is: Uses ML/remote sensing to assess climate-related property risk (wildfire, storm, flood) at scale; often used by insurers and asset managers for risk exposure and reporting. (Not a general corporate carbon-accounting tool — focused on physical climate risk analytics.) (en.wikipedia.org)
• Strengths: High-resolution hazard & risk analytics tied to insurance/regulatory approvals.
• Best for: Insurers, real-estate portfolios, and teams reporting physical climate risk (rather than corporate GHG footprints).

How to choose (quick guide)

• Need full enterprise Scope 1–3 + disclosure readiness (SEC / EU / state rules): consider Watershed or Persefoni. (time.com)
• Need API / developer integration for product-level emissions/Scope 3: consider Climatiq. (businessinsider.com)
• Small/mid-size orgs starting reporting: Greenly is easier and lower-cost to deploy. (Sweep.net)
• Reporting physical climate risk / portfolio vulnerability: ZestyAI or specialized geospatial AI players. (en.wikipedia.org)

Notes and next steps

• “Top-rated” can depend on your needs (size, disclosure obligations, whether you need APIs or audit-grade assurance). The platforms above are frequently cited in industry coverage and vendor guides through 2024–2025. (time.com)
• If you want, I can: (a) shortlist 2–3 platforms matched to your company size / reporting scope, (b) pull recent customer reviews & pricing where available, or (c) draft RFP questions to evaluate vendors. Which would you like?