What is Radarr used for?

Radarr is a movie collection manager for Usenet and BitTorrent users that monitors feeds, then downloads, sorts and renames movies automatically. It is a good fit for automating a personal movie library and upgrading movie quality over time.

Is Radarr open source?

Yes. Radarr is open source under the GPL-3.0 licence. Its source code is on GitHub at Radarr/Radarr and is written mainly in C#.

Yes. Radarr is open source, so the software itself is free to use.

Can I self-host Radarr?

Yes. Radarr can be self-hosted on your own server or infrastructure; there is no official hosted version.

What are some alternatives to Radarr?

Similar open-source tools in the Media & Streaming category include Sonarr, Prowlarr and Lidarr. SaaS products in the same category include Apple TV, Channels DVR and Disney+.

Is Radarr actively maintained?

Yes. The most recent commit to Radarr was on 20 September 2026, and the latest release is v6.4.4.10685, published on 16 September 2026. The project has 14k stars on GitHub.

Radarr: open-source media & streaming

About Radarr

Radarr is a movie collection manager for people who download through Usenet or BitTorrent. It can monitor multiple RSS feeds for new movies and connects to download clients and indexers to grab, sort and rename them. It can also upgrade existing files automatically when a better-quality version becomes available. It is written in C# under the GPL-3.0 license.

Movies are added with details such as trailers and ratings, and it recognizes special editions, director's cuts, releases with hardcoded subtitles and alternate movie names. Failed downloads trigger another release attempt, manual search lets you pick any release or see why one was skipped, and profiles can be customized so it always fetches the copy you want. Metadata such as posters, trailers and subtitles can be imported or added for Kodi and other players.

Download clients supported include SABnzbd, NZBGet, qBittorrent, Deluge, rTorrent, Transmission and uTorrent, with Kodi and Plex integration for notifications and library updates. Only one version of a given movie is supported per instance, so keeping both a 4K and a 1080p copy requires multiple instances. It runs on Windows, Linux, macOS and Raspberry Pi.

Key features

Monitors RSS feeds for new movies
Automatic quality upgrades
Failed download handling
Support for many download clients
Kodi and Plex integration
Custom quality profiles

Good fit for

→Automating a personal movie library
→Upgrading movie quality over time

Built with: C#
Tags: movies; media-automation; usenet; bittorrent; plex; kodi; self-hosted; csharp

Radarr: questions and answers

What is Radarr used for?: Radarr is a movie collection manager for Usenet and BitTorrent users that monitors feeds, then downloads, sorts and renames movies automatically. It is a good fit for automating a personal movie library and upgrading movie quality over time.
Is Radarr open source?: Yes. Radarr is open source under the GPL-3.0 licence. Its source code is on GitHub at Radarr/Radarr and is written mainly in C#.
Is Radarr free?: Yes. Radarr is open source, so the software itself is free to use.
Can I self-host Radarr?: Yes. Radarr can be self-hosted on your own server or infrastructure; there is no official hosted version.
What are some alternatives to Radarr?: Similar open-source tools in the Media & Streaming category include Sonarr, Prowlarr and Lidarr. SaaS products in the same category include Apple TV, Channels DVR and Disney+.
Is Radarr actively maintained?: Yes. The most recent commit to Radarr was on 20 September 2026, and the latest release is v6.4.4.10685, published on 16 September 2026. The project has 14k stars on GitHub.