aptly is described as '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' and is an app. There are 2 alternatives to aptly for Linux, Self-Hosted and Docker. The best aptly alternative is Pulp, which is both free and Open Source.
Pulp is a platform for managing repositories of software packages and making it available to a large numbers of consumers. Pulp can locally mirror all or part of a repository, host your own software packages in repositories, and manage many types of content from multiple sources...
Repomanager is a self-hosted DEB/RPM package repository and patch management solution for Linux servers.
