I'm wondering, before thinking of buying it , if ExtFS MacOs driver is able to open an ext4 drive encrypted with cryptsetup (default crypt-tool for linux) ?
Tested on OSX 10.13.6 at 2018-08-19: Paragon does not support encrypted partitions with luks+ext4 created by cryptsetup or gnomedisks. I just installed the trial version and it physically detects the disk but it indicates that the content is of unknown type.
The solution for me: using virtualbox, install centos7 and mount the external disk using cryptsetup and making the mapper on osx as external disk using sshfs over /Volumes/ directory.