I have bought my first proper home server and am setting up a full stack of media services on truenas scale after years of doing everything manually. In that regard I have set up jellyfin, sabnzbd and radarr, and the next step is to add jellyserr it seems. But then I stumble across prowlarr and cannot figure out if it is a contender to or a supplement to jellyserr. Can somebody tell me what the difference is, if I should use both if they are complementing each other or which you are using if they are competing?
They are two different programs. Prowlarr is an index manager and overserr/jellyserr are requesters.
Indexer pulls a listing of available files from as many indexing services as you add. 1337x, NZBgeek, etc.
Overserr is like a front end for your entire stack. You just tell it what you want media you want and it sends the requests to the stack to figure out.
Overserr talks to -> radar/sonarr talks to -> prowlarr talks to -> sabnzbd/qbit.