CarbonTool vs Persefoni

CarbonTool9.2Visit Persefoni8.9Visit

Higher score CarbonTool #3 in Carbon Accounting Software 9.2/10 30-day trial Free trial✓ 3 of 3 features Visit CarbonTool

vs

Persefoni #6 in Carbon Accounting Software 8.9/10 Free plan Free plan✓ 3 of 3 features Visit Persefoni

• CarbonTool fits best

  Organizations needing affordable audit-ready accounting

• Persefoni fits best

  Teams seeking a free entry point

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Side by side

Feature	CarbonTool 9.2/10 Visit ↗	Persefoni 8.9/10 Visit ↗
At a glance
Editor score	9.2	8.9
Ranking	#3 in Carbon Accounting Software	#6 in Carbon Accounting Software
Best for	Organizations needing affordable audit-ready accounting	Teams seeking a free entry point
Pricing model	Paid	Free plan + paid
Starting price	€2,000/yr	—
Free plan	—	✓ (best)
Free trial	30 days	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Email, Live chat	Docs
Integrations	9 integrations	6 integrations
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features CarbonTool 3/3 · Persefoni 3/3
Supplier engagement	✓	✓
Audit trail	✓	✓
API access	✓	✓
Specs
Scope coverage	Scope 1-3	Scope 1-3
Data collection	Both	Both
Emissions factors	Both	Both
Our review
Pros	Scope 1–3 accounting with 200+ emissions-source templates Supplier surveys, consolidation and major reporting frameworks Audit trail, REST API, OAuth 2.0, webhooks and bulk import	Free Pro plan includes Scope 1, 2, and 3 accounting Transparent Footprint Ledger and audit history support review workflows Integrations, supplier exchange, and AI anomaly detection broaden data collection
Cons	No time-unlimited free plan Core supports single-entity measurement only CSRD reporting starts with the €7,500 Enterprise plan	Advanced analytics and decarbonization planning require the Advanced plan Advanced plan pricing is handled through a demo Pro is positioned for low to medium operational complexity
Our verdict	CarbonTool is a web-based carbon accounting platform for organizations measuring, reporting and reducing greenhouse-gas emissions. It covers GHG Protocol Scope 1, 2 and 3 inventories, with manual entry, spreadsheet import, AI-assisted… Read the review →	Persefoni is a cloud-based carbon accounting and sustainability management platform for organizations measuring, reporting, and reducing greenhouse-gas emissions. It supports Scope 1, 2, and 3 accounting, emissions-factor management,… Read the review →

Strengths and trade-offs

• CarbonTool — where it wins

  • Scope 1–3 accounting with 200+ emissions-source templates
  • Supplier surveys, consolidation and major reporting frameworks
  • Audit trail, REST API, OAuth 2.0, webhooks and bulk import

  Where it doesn't

  • No time-unlimited free plan
  • Core supports single-entity measurement only
  • CSRD reporting starts with the €7,500 Enterprise plan

• Persefoni — where it wins

  • Free Pro plan includes Scope 1, 2, and 3 accounting
  • Transparent Footprint Ledger and audit history support review workflows
  • Integrations, supplier exchange, and AI anomaly detection broaden data collection

  Where it doesn't

  • Advanced analytics and decarbonization planning require the Advanced plan
  • Advanced plan pricing is handled through a demo
  • Pro is positioned for low to medium operational complexity

• CarbonTool9.2/10 · 30-day trial

  Broad Scope 1–3 accounting and reporting from €2,000 per organization annually.

  Visit CarbonToolFull verdict →
• Persefoni8.9/10 · Free plan

  A free entry point for Scope 1–3 accounting with audit-ready workflows and integrations.

  Visit PersefoniFull verdict →