@dhanesh COLON maitri DOT club
Element has all the features that you'd expect from an instant messenger including end-to-end encryption, calls (which mostly depends on the configuration of the server you've signed up on), file sharing and support for multiple devices.
Signal has a good reputation in the cryptography community and is one of the simplest apps to use. It can be considered as a drop-in replacement for WhatsApp. I use Signal with my main phone number.