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Best Plan A Alternatives in 2026

12 apps from carbon accounting software ranked against Plan A on the same published basis.

  1. 1
    Carbonfact Free plan apiWeb Free7.0
    Plan A vs Carbonfact
  2. 2
    CarbonTool Free plan apiWeb $166.67/mo6.9
    Plan A vs CarbonTool
  3. 3
    Greenio Free plan apiWeb ₹2,999/mo6.9
    Plan A vs Greenio
  4. 4
    Persefoni Free plan apiWeb Free6.8
    Plan A vs Persefoni
  5. 5
    CO2 AI Free trial apiWeb 6.4
    Plan A vs CO2 AI
  6. 6
    BigMile Free trial apiWeb 6.1
    Plan A vs BigMile
  7. 7
    CarbonAnalytics Free trial apiWeb £69.99/mo6.1
    Plan A vs CarbonAnalytics
  8. 8
    CarbonChain apiWeb 6.0
    Plan A vs CarbonChain
  9. 9
    ACT Group Decarbonization Platform Web 5.8
    Plan A vs ACT Group Decarbonization Platform
  10. 10
    CarbonInk WinMac 5.8
    Plan A vs CarbonInk
  11. 11
    CarbonSmart Web 5.8
    Plan A vs CarbonSmart
  12. 12
    Carbonstop Ccloud Web 5.8
    Plan A vs Carbonstop Ccloud
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The sponsored alternative slot on this page is labelled and never changes the order above.

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