ONESOURCE Determination vs OpenSalesTax
| ONESOURCE Determination | OpenSalesTax | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Web | api, self-hosted |
| Real-time calculation | Yes | — |
| Tax types | multiple | sales_tax |
| Commerce connectors | Yes | — |
| Exemption certificates | Yes | — |
| Free plan | — | Yes |
| API access | — | Yes |
Both are listed in Best Tax Engine Software. On The Geeks Club, ONESOURCE Determination scores higher on our published basis.