Cryptomator is a free alternative to pCloud Crypto. It is reliable, free, open source, and fully integrated through API to pCloud.
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product.
Wickr me is a real anonymous and fully-encrypted messaging and Voice over IP, contrary to Signal which is not anonymous.
Opensource is more transparent and secure. Here is the explanation and the list of apps you should go for…