tries to have small explicit keys, no config options, and UNIX-style composability.

A gpg alternative that feels more modern, allows for less customization (which is generally a good thing in encryption) and has a very simple interface.

In essence it tries to be everything that gpg is not - except for also being secure. Unfortunately, adoption and integration is nowhere near the level of gpg (e.g. e-mail encryption, keyservers, general adoption with public key profiles reachable over web, etc)