Sphere vs Vatstack
| Sphere | Vatstack | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | $100/mo | $15/mo |
| Open source | No | No |
| Platforms | api | api, Web |
| Free plan | No | Yes |
| Paid from | 100 /mo | 15 /mo |
| API access | Yes | Yes |
| Transaction limit | — | 100 transactions/mo |
| Real-time calculation | — | Yes |
| Tax types | — | multiple |
| Commerce connectors | — | Yes |
Both are listed in Best Tax Engine Software. On Inferse, Sphere scores higher on our published basis.