Best CO2 AI Alternatives in 2026
Updated
20 tools from carbon accounting software ranked against CO2 AI on the same published basis.
- 1CO2 AI vs CarbonTool
- 2CO2 AI vs Greenio
- 3CO2 AI vs Carbonfact
- 5CO2 AI vs EcoReko
- 6CO2 AI vs GreenStitch
- 7CO2 AI vs NetNada
- 8CO2 AI vs Persefoni
- 9CO2 AI vs BigMile
- 10CO2 AI vs CarbonAnalytics
- 11CO2 AI vs Plan A
- 12CO2 AI vs Normative
- 13CO2 AI vs Sweep
- 14CO2 AI vs CarbonChain
- 15CO2 AI vs ACT Group Decarbonization Platform
- 16CO2 AI vs CarbonInk
- 17CO2 AI vs CarbonSmart
- 18CO2 AI vs SINAI Technologies
- 19CO2 AI vs Watershed
- 20CO2 AI vs 50X Impact
- 21CO2 AI vs Arbor
CO2 AI 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 |
| 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 |
| 11 | Plan A | 6.6 | No | — | 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 | — | API, self-hosted, 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 CO2 AI alternatives
What is the best alternative to CO2 AI?
CarbonTool, number 1 in carbon accounting software with a score of 7.4 out of 10. The others here: Greenio, Carbonfact, EcoReko and 16 more.
What is the best free alternative to CO2 AI?
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.