aptly vs fpm: What are the differences?
Developers describe aptly as "Swiss army knife for Debian repository management". aptly is a swiss army knife for Debian repository management: it allows you to mirror remote repositories, manage local package repositories, take snapshots, pull new versions of packages along with dependencies, publish as Debian repository. On the other hand, fpm is detailed as "Effing package management! Build packages for multiple platforms (deb, rpm, etc) with great ease and sanity". It helps you build packages quickly and easily (Packages like RPM and DEB formats). FUNDAMENTAL PRINCIPLE: IF FPM IS NOT HELPING YOU MAKE PACKAGES EASILY, THEN THERE IS A BUG IN FPM.
aptly and fpm can be primarily classified as "Hosted Package Repository" tools.
fpm is an open source tool with 9.19K GitHub stars and 917 GitHub forks. Here's a link to fpm's open source repository on GitHub.