Proxmox Backup Server Beta Announced - Deduplication, Incremental backups, ...

  Main Features
  
  Support for Proxmox VE
  The Proxmox Virtual Environment is fully supported and you can easily backup
  virtual machines (supporting QEMU dirty bitmaps) and containers.
  
  Performance
  The whole software stack is written in Rust, to provide high speed and memory
  efficiency.
  
  Deduplication
  Periodic backups produce large amounts of duplicate data. The deduplication
  layer avoids redundancy and minimizes the used storage space.
  
  Incremental backups
  Changes between backups are typically low. Reading and sending only the delta
  reduces storage and network impact of backups.
  
  Data Integrity
  The built in SHA-256 checksum algorithm assures the accuracy and consistency of
  your backups.
  
  Remote Sync
  It is possible to efficiently synchronize data to remote sites. Only deltas
  containing new data are transferred.
  
  Compression
  The ultra fast Zstandard compression is able to compress several gigabytes of
  data per second.
  
  Encryption
  Backups can be encrypted on the client-side using AES-256 in Galois/Counter
  Mode. This authenticated encryption mode provides very high performance on
  modern hardware.
  
  Web interface
  Manage Proxmox backups with the integrated web-based user interface.
  
  Open Source
  No secrets. Proxmox Backup Server is free and open-source software. The source
  code is licensed under AGPL, v3.
  
  Support
  Enterprise support will be available from Proxmox.

-- https://pbs.proxmox.com/docs/introduction.html#main-features