OpenSalesTax vs Vertex e-Invoicing
| OpenSalesTax | Vertex e-Invoicing | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, self-hosted | api, Web |
| Free plan | Yes | — |
| Tax types | sales_tax | — |
| API access | Yes | Yes |
Both are listed in Best Tax Engine Software. On Everything Xiaomi, Vertex e-Invoicing scores higher on our published basis.