| Price from | $4.95/mo | — |
| Free plan | — | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | — |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Plans published | 10 | 9 |
| Spec score · Business Phone Systems | 7.8 (#123) | 9.2 (#6) |
| Auto attendant | Yes | An auto-attendant acts as a virtual receptionist that greets callers and routes them. |
| Business numbers | multiple | multiple |
| Call routing | custom | custom |
| Desktop and mobile apps | Yes | Yes |
| Free plan | No | No |
| Product | 1-VoIP provides residential and business VoIP phone service and SIP trunking. | Acefone describes itself as a cloud-based communications provider for businesses, with AceX products including Interactions Hub, API Connect, and Campaigns. |
| Support | The company advertises 24/7 support and 100% US-based support staff. | The Professional plan includes 24x7 chat support and 16x5 call support; Ultra includes 24x7 chat and call support. |