Best Plan A Alternatives in 2026
Updated
20 apps from carbon accounting software ranked against Plan A on the same published basis.
- 1Plan A vs Carbonfact
- 2Plan A vs CarbonTool
- 3Plan A vs Greenio
- 4Plan A vs Persefoni
- 5Plan A vs CO2 AI
- 6Plan A vs CarbonInk
- 7Plan A vs 50X Impact
- 8Plan A vs ACT Group Decarbonization Platform
- 9Plan A vs Arbor
- 10Plan A vs CarbonSmart
- 11Plan A vs Carbonstop Ccloud
- 12Plan A vs EcoReko
- 13Plan A vs Hedgehog Carbon Platform
- 14Plan A vs Normative
- 16Plan A vs scoped
- 17Plan A vs SINAI Technologies
- 18Plan A vs Sweep
- 19Plan A vs Vaayu
- 20Plan A vs Watershed
- 21Plan A vs BigMile
Plan A alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Carbonfact | 6.4 | Free plan | Free | API, Web |
| 2 | CarbonTool | 6.4 | Free plan | $166.67/mo | API, Web |
| 3 | Greenio | 6.4 | Free plan | ₹2,999/mo | API, Web |
| 4 | Persefoni | 6.4 | Free plan | Free | API, Web |
| 5 | CO2 AI | 5.5 | No | — | API, Web |
| 6 | CarbonInk | 5.3 | No | — | Windows, Mac |
| 7 | 50X Impact | 5.2 | No | — | Web |
| 8 | ACT Group Decarbonization Platform | 5.2 | No | — | Web |
| 9 | Arbor | 5.2 | No | — | Web |
| 10 | CarbonSmart | 5.2 | No | — | Web |
| 11 | Carbonstop Ccloud | 5.2 | No | — | Web |
| 12 | EcoReko | 5.2 | No | — | Web |
| 13 | Hedgehog Carbon Platform | 5.2 | No | — | Web |
| 14 | Normative | 5.2 | No | — | Web |
| 16 | scoped | 5.2 | No | — | Web |
| 17 | SINAI Technologies | 5.2 | No | — | Web |
| 18 | Sweep | 5.2 | No | — | Web |
| 19 | Vaayu | 5.2 | No | — | Web |
| 20 | Watershed | 5.2 | No | — | Web |
| 21 | BigMile | 5.0 | No | — | API, Web |
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Questions about Plan A alternatives
What is the best alternative to Plan A?
Carbonfact, number 1 in carbon accounting software with a score of 6.4 out of 10. The others here: CarbonTool, Greenio, Persefoni and 16 more.
What is the best free alternative to Plan A?
Carbonfact is the best-ranked alternative with a free plan. 4 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.