Arq

A new generation cross-platform cloud backup tool. Duplicacy backs up your files to many cloud storages with client-side encryption and the highest level of deduplication. Duplicacy is built on top of a new idea called lock-free deduplication, which works by relying on the basic file system API to manage deduplicated chunks without using any locks. A two-step fossil collection algorithm is devised to solve the fundamental problem of deleting unreferenced chunks under the lock-free condition, making the deletion of old backups possible without using a centralized chunk database. Duplicacy comes with a newly designed web-based GUI that is not only artistically appealing but also functionally powerful. With just a few clicks, you can effortlessly set up backup, copy, check and prune jobs that will reliably protect your data while making the most efficient use of your storage space. The intuitive dashboard includes several statistical charts.

Restic is a modern backup program that can back up your files from Linux, BSD, Mac, and Windows to many different storage types, including self-hosted and online services. Easily, being a single executable that you can run without a server or complex setup. Effectively, only transferring the parts that actually changed in the files you back up, Securely, by careful use of cryptography in every part of the process. Verifiably, enabling you to make sure that your files can be restored when needed. Freely, restic is entirely free to use and completely open-source. Backward compatibility for backups is important so that our users are always able to restore saved data. Therefore restic follows semantic versioning to clearly define which versions are compatible. The repository and data structures contained therein are considered the “Public API” in the sense of semantic versioning.