Signal is a social messaging application as same as whatsapp through which u can connect with your knows ones or with friends and signal app is available on android, iphone or ipad, window, linux and signal app is developed by signal foundation and this is a non- profit foundation and launched in 2014 and marlinspike is the CEO of signal messaging app.
And the signal is also a messaging app as same as whatsapp and also this is a secured messenger and took user privacy seriously. According to signal they focus on privacy with all feature as same as whatsapp messenger also with end-to-end encryption chats. And keep user chats, calls and conversation private.
The tweet of Elon musk affect both the messaging app whatsapp messenger loss active user and signal messenger start gaining of user, million of people switching to signal because of security and privacy issues.
In recent days signal have over 17 million downloads and get huge active user data base and same as whatsapp have downfall in whatspp active user database. After getting huge flux on signal there is technical issue occurred while sending or receiving messages. And company claims it is due to high number of user signing on signal messenger and say they resolve the problem as soon as possible.