OpenSalesTax vs Sphere
| OpenSalesTax | Sphere | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | $100/mo |
| Open source | No | No |
| Platforms | api, self-hosted | api |
| Free plan | Yes | No |
| Tax types | sales_tax | — |
| API access | Yes | Yes |
| Paid from | — | 100 /mo |
Both are listed in Best Tax Engine Software. On The Geeks Club, Sphere scores higher on our published basis.