Callcentric SIP Trunking vs O2 Business SIP Trunking
| Callcentric SIP Trunking | O2 Business SIP Trunking | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | £1/mo |
| Platforms | Android, extension, iOS, Linux, macOS, self-hosted, Web, Windows | Web |
| Free plan | Yes | No |
| Pricing model | per-minute | per-minute |
| Concurrent channels | 3 channels | |
| Number porting | Yes | Yes |
| Emergency calling | Yes | Yes |
| Toll-free numbers | Yes | Yes |
| Encrypted signaling | No |
Listed together in Best SIP Trunking Providers