1. Symantec Drive Encryption
If you are looking for a premium product, Symantec Drive Encryption is one of the best options. The company is well-known for being one of the top providers in the encryption market. Since it is proprietary, the code is closed source. It has an easy to use interface and comes with a number of different features such as local policy management, strong PGP encryption, reduced data loss, resource management, and more.
DiskCryptor is open source and free, just like TrueCrypt was. It can encrypt any of your files, system drives, and external system drives, as well as all the bells and whistles you could want. It uses a number of different algorithms like AES (Advanced Encryption Standard), Twofish, and Serpent as well as combinations of cascaded algorithms. Keep in mind this is for Windows-based machines only.
Probably the truest replacement for TrueCrypt, VeraCrypt is based on the program. Because of that, you can expect to see some of the same features you are used to in the program. That said, there are definitely some security upgrades that you can expect to find in VeraCrypt. It includes algorithms like AES, Serpents, Twofish, and more.
BoxCryptor has both free and premium versions. It is file based and on the fly. It supports AES256 and RSA encryption technologies. Additionally, it supports many cloud service devices such as Dropbox, Google Drive, Box, and more. When you do that, just can encrypt all of your data before uploading it to your favorite cloud storage. This program is available for PC, Linux, Mac, Android, and iOS.
AxCrypt is free, lightweight, and open-source. It is only available for Windows and needs no configurations. When you are going to encrypt a file using AxCrypt, you just need to right click on that file and select “encrypt” option. Your file will be encrypted with AES – 128-bit encryption immediately. It is the easiest to use encryption software among the rest, but many prefer higher levels of security.
For those that have used TrueCrypt for a long time, DiskCryptor will probably be your the best alternative. That said, you may have better luck with VeraCrypt if you want to keep it looking similar to TrueCrypt. All of these choices are good options, so you will want to take a look at all of them and see which one best fits your needs.