Hi . Due to the encryption used by those apps, we cannot detect sensitive data movement on them (and no other vendor can). For WhatsApp, we can however detect activities such as Upload and Download, and the sizes of the files being transferred. You could create real-time policies based on those activities.

Using Tuvis (a Netskope partner) you should be able to pass any text messages, files, videos and audios through your DLP and also store it for further investigation.