CarbonChain vs Plan A
| CarbonChain | Plan A | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | api, Web | Web |
| Free plan | No | — |
| Scope coverage | scope 1-3 | scope 1-3 |
| Data collection | both | both |
| Emissions factors | both | built-in |
| Supplier engagement | Yes | Yes |
| Audit trail | Yes | Yes |
| API access | Yes | Yes |
Both are listed in Best Carbon Accounting Software. On Freedom251, Plan A scores higher on our published basis.