Gradwell SIP Trunking vs Sinch Fax API
| Gradwell SIP Trunking | Sinch Fax API | |
|---|---|---|
| Platforms | Web | api, Web |
| Free plan | No | No |
| Pricing model | hybrid | hybrid |
| Number porting | Yes | Yes |
| Emergency calling | Yes | |
| Toll-free numbers | Yes | |
| Encrypted signaling | Yes | |
| Inbound faxing | Yes | |
| Outbound faxing | Yes | |
| Delivery tracking | Yes | |
| Webhook events | Yes | |
| API protocol | rest | |
| Inbound calling | Yes | |
| Outbound calling | Yes | |
| Phone number support | Yes | |
| SIP support | Yes | |
| Call recording | Yes | |
| Concurrent call limit | 10 calls | |
| SDK languages | Node.js, Java, .NET, Python |
Listed together in Best SIP Trunking Providers