Open-Source Backup Software: Central Platforms vs Simple Tools

Backup software can mean very different things.
Restic⤴ can be a single executable started by a script. BorgBackup⤴ is built around deduplicated repositories. Bareos⤴ manages clients, jobs and storage through a central backup environment. Proxmox Backup Server⤴ is closely tied to virtual infrastructure.
They all create backups. The way they do it is very different.
That matters because backing up a few Linux servers is not the same task as managing hundreds of machines, several operating systems and different storage systems.

So a useful starting question is:
How do you want to manage your backups?

Bareos and Bacula: Central Backup Platforms

Bareos is built around a central Director that coordinates backup and restore jobs, clients, schedules and storage. File Daemons run on protected systems, while Storage Daemons handle the backup data.

Bacula⤴ uses a similar model, with a Director, File Daemons and Storage Daemons.

This requires more setup than a standalone backup tool. In return, clients, jobs and storage can be managed as one environment.

For a few machines, that may be more than necessary. When the number of systems, policies and administrators grows, central management becomes much more useful.

UrBackup: Centralized, but More Compact

UrBackup⤴ also uses a central server to manage connected clients and combines file and image backup in one system. It supports Windows, Linux, macOS and FreeBSD, but the product is somewhat more Windows-oriented, especially when it comes to image backup and bare-metal recovery. Its scope is narrower than Bareos or Bacula.

Proxmox Backup Server: Built Around Proxmox VE

Proxmox Backup Server is designed closely around Proxmox VE.
Virtual machines and LXC containers can be backed up directly from the virtualization platform, while PBS handles storage, deduplication, verification and synchronization. It can also protect standalone Linux systems through proxmox-backup-client. Outside Linux and Proxmox VE, its scope is more limited.

Restic and BorgBackup: Keep It Small

Restic takes a much leaner approach. You create a repository, run a backup command and get snapshots that can later be checked or restored. Scheduling and monitoring normally come from tools such as cron, systemd or external automation. Restic runs on Linux, Windows, macOS and BSD systems.

BorgBackup follows a similar lightweight model, with a focus on deduplication, compression and encrypted local or remote repositories. Its platform is more Unix-oriented.

Related:
BorgBackup documentation

The advantage of both tools is simple: fewer components.
The disadvantage is that central scheduling, monitoring and policy management have to be built around them when the environment grows.

Duplicati: A Backup Client with Central Management Available

Duplicati⤴ provides encrypted, incremental and compressed backups to local and remote destinations and runs on Windows, Linux and macOS. Individual installations can be managed through their own interface. Duplicati Console adds centralized monitoring and management, with broader functionality available through paid plans.

This puts Duplicati somewhere between a standalone backup client and a centrally managed platform.

Why Does the Difference Matter?

For three Linux servers, a few automated backup commands may be enough.
For 200 machines, things change. Different schedules, users, credentials, retention rules and storage locations all need to be managed somewhere.

The backup commands may still be simple. Managing all of them is not.
Central backup platforms put more of that coordination inside the backup software. Smaller tools leave more of it to scripts, monitoring systems and other infrastructure.

Neither approach removes complexity. It puts the complexity in a different place.

Which Approach Fits Which Task?

If you expect the backup environment to grow over time, Bareos and Bacula give you more room to expand without changing the basic architecture. You can start with a smaller setup and later add more clients, storage systems, schedules or administrators within the same central platform.

If you are confident that only a few systems need to be protected and the environment is unlikely to become much more complex, a smaller tool such as Restic, BorgBackup or Duplicati may be easier to run. Less infrastructure, fewer components to maintain.

For infrastructure built mainly around Proxmox VE, Proxmox Backup Server is a natural fit because backup of VMs and containers is closely integrated with the virtualization platform.

UrBackup sits somewhere in between. It provides central management without the same breadth as Bareos or Bacula, with a stronger focus on file and image backup.

There is no architecture that fits every environment. A lightweight tool can be the better choice for a small and stable setup. But if you expect more systems, storage targets or backup requirements later, it makes sense to think about that growth before choosing the architecture.

Architecture is only one part of the decision. Where backup data is stored, how it is protected, and what happens when you need to recover a VM, database or complete system can matter just as much. We’ll look at those differences next – starting with storage, deduplication, encryption and backup security.

The useful question is not simply which product has more features.

How Open-Source Backup Tools Differ: From Simple Tools to Central Backup Platforms