The best websites like Signal.org. Top Signal.org alternatives 2020. Explore 16 alternatives to Signal.org and read 10 reviews now on SameAs.NetSignal, like all other popular messaging applications, meets all kinds of communication needs of users. An additional feature is the high level of security. In Signal, all voice and video calls, file sharing, in short, everything that happens in the application is encrypted with high-end security protocols. So no one can interrupt and hack conversations unless a third party reaches the phone. Due to the heavy encryption of the voice search, the voice quality is very high, even though the search starts a few seconds later and there are no interruptions like in other applications. For example, other applications do not encrypt the contact list, so the address list and who records the time at which the calls are made are saved to their servers. In Signal, everything is encrypted, including this information.