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ACT Group Decarbonization Platform vs CarbonTool

Both stand on carbon accounting software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

ACT Group Decarbonization Platform

Free plan Web

Consider ACT Group Decarbonization Platform if your organization needs connected emissions accounting, supplier engagement, and renewable energy procurement. Organizations seeking a set per-seat price should note that pricing is quoted based on program scope and complexity.

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CarbonTool

Free plan APIWeb

CarbonTool combines emissions data collection, framework reporting, entity consolidation, and reduction planning. The free Starter is limited to Scope 1 and 2, while paid plans add full Scope 3 coverage.

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The facts

ACT Group Decarbonization PlatformCarbonTool
Free planYesYes
Open sourceNot publishedNot published
Runs onWebAPI, Web
Lowest paid planFree or on requestCore: €2,000 a year
Plans published44
MakerNot publishedNot published
Websiteactgroup.comcarbontool.com
On carbon accounting software#1 of 31#3 of 31

ACT Group Decarbonization Platform: what it does well

  • Supports Scope 1, 2, and 3 accounting.
  • Includes audit trails and line-item data quality controls.
  • AI supplier screening can estimate emissions for up to 80% of emissions.
  • Offers EAC procurement across more than 100 countries.
  • Connects with existing GHG accounting systems and supports PACT PCF exchange.

What to know first

  • Pricing is available by quote and depends on program scope and complexity.
  • The platform is web-based; no other platform is listed.
  • PLAN calculations are quarterly or annual.

CarbonTool: what it does well

  • Supports CSRD, VSME, GRI, CDP, and ISSB reporting.
  • Includes more than 200 emission-source templates.
  • Tracks entities separately and consolidates group inventories.
  • Offers scenario comparisons for impact, cost, and return.
  • Emissions data stays on EU infrastructure.

What to know first

  • Free Starter covers only Scope 1 and 2.
  • Paid plans start at €2,000 per year.
  • MCP server access is on request.

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