Firefox Relay vs OPC Mail
| Firefox Relay | OPC Mail | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Android, extension, iOS, Web | Web, iOS |
| Free plan | Yes | Yes |
| Custom domains | No | Yes |
| Reply from alias | Yes | — |
| Send from alias | No | — |
| Browser extension | Yes | — |
| Mobile apps | — | ios |
Both are listed in Best Email Alias Services. On Everything Xiaomi, Firefox Relay scores higher on our published basis.