1.Signal

features


   1.Open source encryption
   2.End-to-end encryption
   3.Available on all major platforms
   4.Disappearing messages  
 
  Signal is works on all mobile platforms, and strong encryption. It also offers voice and video calling, so you won’t miss WhatsApp messenger. Every message is encrypted, so only the sender and receiver can read them. Messages are completely unreadable to hackers. and Signal is free.



2.Threema

features

   1. Password protect your chats
   2. No need for phone number
   3. Text formatting features
   4. Contacts can be verified with QR codes


        Threema is based in Switzerland. Threema provides end-to-end encryption for all message types, including voice calls, shared files, and chats. Threema is Paid app. The app promises complete privacy, Your contact lists and group data are stored solely on your phone.



3.Telegram

features


   1. Cloud-based so you never lose your material 
   2. Open-source software
   3. User-friendly platform
 
          Telegram is a popular alternative messenger to WhatsApp. Now 200 million and above  active users. It also supports multimedia file sharing. Telegram is uses a double-tick system to see when someone received a message, and the Encryption is not by default and needs to be manually turned on. Telegram is created own standard encryption, which has been criticized


   1.Timed messages
   2.Ability to use 8 devices simultaneously
   3.Secure chats
   4.Rich conversations


         Wire is offers free personal and paid business plans.The messenger is a secure app with end-to-end encryption. Wire protected by European data retention laws. it is a paid app, it also support multimedia file sharing and audio filtering. Wire is available for all major platforms.



     1.Open-source software
     2.Clean desktop client
     3.Available in seven languages
     4.User IDs instead of phone numbers

      The Riot works on open source software, the messenger provide every  user receives a unique ID. The app available in seven languages. the messenger supports VoIP and video calling, with end-to-encryption for message. But the encryption is not enabled by default, need to be manually switched on.