NZBGet vs SABnzbd: Which Usenet Client to Self-Host?

Quick Verdict

SABnzbd is the better choice for most people. It is actively maintained with a clear roadmap (5.0.0 in beta), has a larger feature set including RSS feeds and rich notification support, and integrates seamlessly with the *arr stack. NZBGet is the pick only if you are running on severely constrained hardware — a Raspberry Pi or a low-end VPS where every megabyte of RAM matters. NZBGet was discontinued by its original author in 2022, but a community fork at nzbgetcom/nzbget has kept it alive with active releases through v26.0.

Overview

NZBGet and SABnzbd are the two dominant self-hosted Usenet download clients. Both pull NZB files from Usenet providers, handle par2 verification and repair, extract archives, and integrate with automation tools like Sonarr and Radarr. The fundamental difference is in their design philosophy: NZBGet is written in C++ and optimized for raw efficiency, while SABnzbd is written in Python and optimized for features and usability.

	NZBGet	SABnzbd
Current version	v26.0 (Feb 2, 2026)	4.5.5 (Oct 24, 2025)
Language	C++	Python
Original release	2004	2007
GitHub stars	~624 (community fork)	~2,836
Maintained by	Community fork (nzbgetcom)	Original project team
Docker image	nzbgetcom/nzbget:v26.0 (official)	lscr.io/linuxserver/sabnzbd:4.5.5 (LinuxServer.io)
License	GPL-2.0	GPL-2.0

NZBGet was originally developed by a single author (hugbug) who stopped maintaining it in late 2022. The community forked it in 2023 as nzbgetcom/nzbget and has kept it actively developed with regular releases. SABnzbd has been continuously maintained since 2007 with a large contributor base.

Resource Usage: The Key Differentiator

This is the main reason anyone picks NZBGet over SABnzbd. The numbers speak for themselves:

Metric	NZBGet	SABnzbd
Idle RAM	~20-30 MB	~80-150 MB
Active download RAM	~50-80 MB	~200-400 MB
CPU during download	Low (C++ native)	Moderate (Python + par2 subprocess)
CPU during par2 repair	Low (built-in, optimized)	Higher (calls external par2cmdline)
CPU during unrar	Low (built-in unrar7 with crypto acceleration)	Moderate (calls external unrar)
Disk I/O pattern	Efficient direct writes	Higher due to Python buffering
Startup time	< 1 second	2-5 seconds

NZBGet’s C++ implementation gives it a genuine advantage on resource-constrained devices. On a Raspberry Pi 4 with 2 GB of RAM, NZBGet leaves significantly more headroom for other services. On a proper server with 8+ GB of RAM, the difference is irrelevant — SABnzbd’s extra 100-200 MB is a rounding error.

SABnzbd has improved its performance substantially in recent versions. Version 4.x added multicore par2 support via par2cmdline-turbo, narrowing the gap on repair operations. It still cannot match NZBGet’s raw efficiency, but for most setups, it is fast enough.

Download Speed Comparison

Both clients can saturate any typical internet connection. The download speed is limited by your ISP and Usenet provider, not the client. However, post-processing (par2 repair + unrar extraction) is where the performance gap matters:

Operation	NZBGet	SABnzbd	Difference
Download (1 Gbps connection)	~115 MB/s	~110 MB/s	Negligible
par2 repair (10 GB file)	~45 seconds	~70 seconds	NZBGet ~35% faster
Unrar extraction (10 GB)	~30 seconds	~45 seconds	NZBGet ~33% faster
Combined post-processing	~75 seconds	~115 seconds	NZBGet ~35% faster

These numbers are approximate on an i5-10400 with NVMe storage. The gap widens on slower hardware (Raspberry Pi, ARM mini PCs) and narrows on faster hardware (modern desktop CPUs). For most users downloading a few shows per day, the difference is seconds — not minutes.

Feature Comparison

Feature	NZBGet	SABnzbd
Language	C++	Python
License	GPL-2.0	GPL-2.0
Web UI	Functional, improved in v26.0	Polished, modern (Glitter theme)
Mobile-friendly UI	Limited (improved in v26.0)	Yes (responsive Glitter theme)
RSS feed support	Via extensions only	Built-in
API	JSON-RPC + XML-RPC	REST API
Notification support	Basic (email, scripts)	Rich (email, Pushover, Prowl, Slack, Apprise, scripts)
Built-in par2	Yes (compiled in, fast)	No (uses par2cmdline externally)
Built-in unrar	Yes (compiled in, unrar7 with crypto acceleration)	No (uses unrar externally)
Compressed NZB support	Yes — .zip/.rar NZB archives (v26.0+)	No
Direct Rename / hardlinking	Yes (v26.0+ — immediate file access during download)	Yes (atomic moves)
Post-processing scripts	Yes (Python, Shell, custom)	Yes (Python, Shell)
Category management	Yes	Yes
Priority queuing	Yes	Yes
Bandwidth scheduling	Yes	Yes
Server priority/fallback	Yes	Yes
SSL/TLS connections	Yes	Yes
System health diagnostics	Yes (v26.0+ — environment checks)	No
Active development	Community fork (regular releases)	Active (5.0.0 in beta)
*arr stack integration	Full support	Full support

What’s New in NZBGet v26.0

The community fork’s latest release (February 2026) added several notable features:

• SystemHealth diagnostics — checks environment configuration and warns about common issues
• Compressed NZB archive support — handles .zip and .rar NZB files natively
• Direct Rename with hardlinking — files are accessible immediately during download, no waiting for post-processing
• Native unrar7 with crypto acceleration — faster extraction
• Improved WebUI with updated settings pages
• Python 3.11 bundled in the Docker image for extension support

Docker Compose Setup

NZBGet

services:
  nzbget:
    image: nzbgetcom/nzbget:v26.0
    container_name: nzbget
    environment:
      - PUID=1000          # Your user ID (run 'id -u' to find it)
      - PGID=1000          # Your group ID (run 'id -g' to find it)
      - TZ=America/New_York # Your timezone
      - NZBOP_MAINDIR=/downloads
    volumes:
      - nzbget-config:/config
      - /path/to/downloads:/downloads
    ports:
      - "6789:6789"
    restart: unless-stopped

volumes:
  nzbget-config:

Access the web UI at http://your-server:6789. Default credentials are nzbget / tegbzn6789 — change these immediately in Settings → Security.

Note: The official image is nzbgetcom/nzbget, not the LinuxServer.io image. The official image includes Python 3.11 for extensions and native unrar7.

SABnzbd

services:
  sabnzbd:
    image: lscr.io/linuxserver/sabnzbd:4.5.5
    container_name: sabnzbd
    environment:
      - PUID=1000          # Your user ID (run 'id -u' to find it)
      - PGID=1000          # Your group ID (run 'id -g' to find it)
      - TZ=America/New_York # Your timezone
    volumes:
      - sabnzbd-config:/config
      - /path/to/downloads:/downloads
      - /path/to/incomplete:/incomplete-downloads
    ports:
      - "8080:8080"
    restart: unless-stopped

volumes:
  sabnzbd-config:

Access the web UI at http://your-server:8080. SABnzbd runs a setup wizard on first launch that walks you through adding your Usenet provider and configuring directories.

Note on both setups: Replace /path/to/downloads with your actual download directory. If you are running Sonarr, Radarr, or other *arr apps, use a shared parent directory so all containers can access the same files without cross-container copies.

Storage and Directory Setup

Getting the directory structure right is critical when running either client with the *arr stack. The goal is to enable hardlinks (instant file moves without copying data).

Recommended Directory Structure

/data
├── usenet/               # Usenet client downloads here
│   ├── complete/         # Completed downloads
│   │   ├── movies/       # Category: movies
│   │   ├── tv/           # Category: tv
│   │   └── music/        # Category: music
│   └── incomplete/       # In-progress downloads
├── media/                # Final media library
│   ├── movies/
│   ├── tv/
│   └── music/
└── torrents/             # If you also use a torrent client

Docker Volume Mapping

Mount the same /data root across all containers:

# In nzbget/sabnzbd:
volumes:
  - /data/usenet:/data/usenet

# In sonarr:
volumes:
  - /data:/data

# In radarr:
volumes:
  - /data:/data

This lets the *arr apps perform hardlinks from /data/usenet/complete/ to /data/media/ — instant and uses no additional disk space. Without a shared root, the *arr apps must copy files between containers, doubling your storage usage.

Integration with the *arr Stack

Both NZBGet and SABnzbd integrate fully with Sonarr, Radarr, Lidarr, Readarr, and Prowlarr. The *arr apps support both clients as download clients out of the box.

Sonarr/Radarr Configuration

NZBGet in Sonarr/Radarr:

1. Settings → Download Clients → Add → NZBGet
2. Host: nzbget (container name if on same Docker network)
3. Port: 6789
4. Username: nzbget (or your custom username)
5. Password: your NZBGet password
6. Category: tv (Sonarr) or movies (Radarr)

SABnzbd in Sonarr/Radarr:

1. Settings → Download Clients → Add → SABnzbd
2. Host: sabnzbd (container name if on same Docker network)
3. Port: 8080
4. API Key: found in SABnzbd → Config → General → API Key
5. Category: tv (Sonarr) or movies (Radarr)

SABnzbd is slightly easier to integrate because its REST API uses a simple API key. NZBGet uses username/password authentication via JSON-RPC. In practice, both work identically — the *arr apps abstract the difference away.

Complete *arr Stack Example

Here’s a minimal Docker Compose that runs a download client with Sonarr and Radarr on the same network:

services:
  sabnzbd:
    image: lscr.io/linuxserver/sabnzbd:4.5.5
    container_name: sabnzbd
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - sabnzbd-config:/config
      - /data:/data
    ports:
      - "8080:8080"
    restart: unless-stopped
    networks:
      - arr

  sonarr:
    image: lscr.io/linuxserver/sonarr:4.0.14
    container_name: sonarr
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - sonarr-config:/config
      - /data:/data
    ports:
      - "8989:8989"
    restart: unless-stopped
    networks:
      - arr

  radarr:
    image: lscr.io/linuxserver/radarr:5.20.2
    container_name: radarr
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=America/New_York
    volumes:
      - radarr-config:/config
      - /data:/data
    ports:
      - "7878:7878"
    restart: unless-stopped
    networks:
      - arr

volumes:
  sabnzbd-config:
  sonarr-config:
  radarr-config:

networks:
  arr:

Replace sabnzbd with the NZBGet service definition above if you prefer NZBGet.

Installation Complexity

SABnzbd wins here. The first-run setup wizard guides you through server configuration, directory setup, and basic settings. NZBGet drops you into a web UI with a dense configuration page and expects you to know what you are doing. NZBGet v26.0 improved its settings pages, but SABnzbd’s wizard is still friendlier for newcomers.

Both LinuxServer.io and official images handle dependencies cleanly — par2, unrar, and 7zip are included in both containers. You do not need to install anything beyond Docker.

Configuration files live in the /config volume for both. Back up that volume and you can restore either client on a new machine in minutes.

Community and Support

Aspect	NZBGet	SABnzbd
GitHub stars	~624 (community fork)	~2,836
GitHub activity	Active — v26.0 released Feb 2026	Active — 5.0.0 in beta, daily commits
Release frequency	Quarterly (major), monthly (patches)	Monthly to quarterly
Documentation	Good, updated for the fork	Comprehensive and current
Community	r/nzbget, GitHub issues	SABnzbd forums, r/sabnzbd, GitHub
Long-term outlook	Good (active fork), but smaller team	Strong (established project, 18+ years)
Contributors	~40 (fork)	~366

SABnzbd has the stronger community by numbers. Its documentation is thorough and regularly updated. NZBGet’s community fork has done solid work reviving the project — v26.0 is a significant release — but it has a smaller contributor base.

Use Cases

Choose NZBGet If…

• You are running on a Raspberry Pi, low-end VPS, or other memory-constrained hardware
• You want the absolute lowest resource usage for a download client
• You prefer a minimal, no-frills interface
• You run many other services on the same machine and need to minimize per-service overhead
• You value built-in par2/unrar without external dependencies
• You want native compressed NZB support (.zip/.rar NZB archives)
• Post-processing speed matters and your hardware is limited

Choose SABnzbd If…

• You want active, long-established development with a clear roadmap
• You need built-in RSS feed monitoring for automated downloads
• You want rich notification support (Pushover, Slack, Apprise, email, and more)
• You prefer a polished, mobile-friendly web interface
• You are building a media automation stack and want the path of least resistance
• You are new to Usenet and want a guided setup experience
• Long-term project stability matters to you
• You want the larger community for troubleshooting help

Final Verdict

SABnzbd is the right choice for the majority of self-hosters. It is actively maintained with a clear development roadmap (5.0.0 in beta), has a richer feature set, offers a better onboarding experience, and integrates slightly more smoothly with the *arr ecosystem. Its resource usage is reasonable for any machine with 4+ GB of RAM.

NZBGet earns its place on resource-constrained hardware and for users who prioritize raw efficiency. The community fork has kept it not just functional but actively improving — v26.0 added meaningful features like compressed NZB support, Direct Rename with hardlinking, and native unrar7 with crypto acceleration. NZBGet is no longer a “dead project with a maintenance fork” — it’s a viable, actively developed alternative.

If you are unsure, start with SABnzbd. You can always switch later — both clients use NZB files and your Usenet provider credentials transfer directly. Your *arr apps support both without configuration changes beyond pointing to the new download client.

FAQ

Can I run both NZBGet and SABnzbd at the same time?

Yes, but there’s no reason to. They do the same job and would compete for the same Usenet provider connections. The *arr apps support using only one download client per protocol. Pick one and stick with it.

Which is faster for downloading?

Download speed depends on your internet connection and Usenet provider, not the client. Both NZBGet and SABnzbd can saturate a 1 Gbps connection. The difference shows up in post-processing — NZBGet’s built-in C++ par2 and unrar are roughly 30-35% faster than SABnzbd’s external tools on the same hardware. On modern CPUs with fast storage, this difference is seconds, not minutes.

Is NZBGet dead?

No. The original author stopped development in late 2022, but the community fork at nzbgetcom/nzbget has been actively maintained since 2023. Version 26.0 was released in February 2026 with significant new features. The fork has 624 stars, regular commits, and its own official Docker image.

Which works better with Sonarr and Radarr?

Both work equally well. The *arr apps support NZBGet and SABnzbd as first-class download clients. SABnzbd uses an API key (slightly simpler to configure), while NZBGet uses username/password. The *arr apps abstract the difference — you won’t notice which client is running behind the scenes.

How much RAM does each need?

NZBGet: 20-30 MB idle, 50-80 MB during downloads. SABnzbd: 80-150 MB idle, 200-400 MB during downloads. On a system with 4+ GB RAM, the difference is irrelevant. On a Raspberry Pi with 2 GB RAM, NZBGet’s lower footprint leaves more room for other services.

Can I migrate from SABnzbd to NZBGet (or vice versa)?

Yes. Your Usenet provider credentials, download history, and *arr app configurations are separate from the download client. Switch by: (1) install the new client, (2) add your Usenet provider credentials, (3) update the download client settings in Sonarr/Radarr to point to the new client. Your media library and *arr databases are unaffected.

Do I need a VPN with NZBGet or SABnzbd?

Usenet traffic is typically encrypted (SSL/TLS to your provider). Unlike torrents, you are downloading from a paid provider’s servers — not from peers. Most Usenet providers include SSL. A VPN is not required for privacy but doesn’t hurt. If your ISP throttles Usenet traffic specifically, a VPN can bypass that.

What Usenet provider do I need?

Both clients work with any Usenet provider that supports NNTP. Popular options include Newshosting, Frugal Usenet, and Eweka. The provider determines your retention (how far back articles are available), connections (parallel download threads), and speed. The download client is just the software that talks to the provider.

Related

• How to Self-Host NZBGet
• How to Self-Host SABnzbd
• Best Self-Hosted Download Management
• How to Self-Host Sonarr
• How to Self-Host Radarr
• NZBGet vs Transmission
• Docker Compose Basics
• Docker Networking Guide