otr.to vs Signal
| otr.to | Signal | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Web | Android, iOS, Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Desktop app | No | Yes |
| Paid from | — | 1.99 /mo |
| Encryption coverage | — | default |
| Maximum group size | — | 1,000 members |
| Linked device limit | — | 5 devices |
| Voice and video calls | — | Yes |
| Disappearing messages | — | Yes |
| Encrypted backups | — | end_to_end |
Both are listed in Best Encrypted Messaging Apps. On Samsung Mobile US Press, Signal scores higher on our published basis.