Best Plan A Alternatives in 2026
Updated
20 tools from carbon accounting software ranked against Plan A on the same published basis.
- 1Plan A vs CarbonTool
- 2Plan A vs Greenio
- 3Plan A vs Carbonfact
- 4Plan A vs CO2 AI
- 5Plan A vs EcoReko
- 6Plan A vs GreenStitch
- 7Plan A vs NetNada
- 8Plan A vs Persefoni
- 9Plan A vs BigMile
- 10Plan A vs CarbonAnalytics
- 12Plan A vs Normative
- 13Plan A vs Sweep
- 14Plan A vs CarbonChain
- 15Plan A vs ACT Group Decarbonization Platform
- 16Plan A vs CarbonInk
- 17Plan A vs CarbonSmart
- 18Plan A vs SINAI Technologies
- 19Plan A vs Watershed
- 20Plan A vs 50X Impact
- 21Plan A vs Arbor
Plan A alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | CarbonTool | 7.4 | Free plan | $166.67/mo | API, Web |
| 2 | Greenio | 7.3 | Free plan | ₹2,999/mo | API, Web |
| 3 | Carbonfact | 7.1 | Free plan | Free | API, Web |
| 4 | CO2 AI | 7.0 | No | — | API, Web |
| 5 | EcoReko | 7.0 | Free plan | €375/mo | Web |
| 6 | GreenStitch | 6.8 | No | $250/mo | API, Web |
| 7 | NetNada | 6.8 | No | — | API, self-hosted, Web |
| 8 | Persefoni | 6.8 | Free plan | Free | API, Web |
| 9 | BigMile | 6.7 | No | — | API, Web |
| 10 | CarbonAnalytics | 6.7 | No | £69.99/mo | API, Web |
| 12 | Normative | 6.5 | No | — | Web |
| 13 | Sweep | 6.5 | No | — | Web |
| 14 | CarbonChain | 6.3 | No | — | API, Web |
| 15 | ACT Group Decarbonization Platform | 6.0 | No | — | Web |
| 16 | CarbonInk | 6.0 | Free plan | Free | Mac, Windows |
| 17 | CarbonSmart | 6.0 | No | — | Web |
| 18 | SINAI Technologies | 6.0 | No | — | Web |
| 19 | Watershed | 6.0 | No | — | Web |
| 20 | 50X Impact | 5.9 | No | — | Web |
| 21 | Arbor | 5.9 | No | — | Web |
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Questions about Plan A alternatives
What is the best alternative to Plan A?
CarbonTool, number 1 in carbon accounting software with a score of 7.4 out of 10. The others here: Greenio, Carbonfact, CO2 AI and 16 more.
What is the best free alternative to Plan A?
CarbonTool is the best-ranked alternative with a free plan. 6 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.