NZBfast is a drop-in SABnzbd and NZBGet replacement that downloads from Usenet at line rate and hands you finished jobs verified and extracted. Point Sonarr, Radarr, LunaSea, or nzb360 at it and they keep working untouched, because the APIs they already speak are the ones it answers. The dashboard charts live throughput and resource use beside a drag-to-reorder queue with per-job detail, a provider leaderboard, and data-usage history. Fetching, PAR2 verification, and unpacking overlap in a single pass, so archives open in the stream and a job needs about its own size in free disk. RAR, 7z, and zip sets, encrypted archives, password chains, and nested archives all go through that pipeline, with automatic PAR2 repair when articles arrive damaged. The poster wall turns your newsgroups into a browsable media library with cover art and metadata, and videos preview with real seeking mid-download. Switch on the optional built-in indexer and it scans your groups into a local index behind a Newznab endpoint your other tools can query. Watchlists grab new postings and chase quality upgrades, while RSS automation, Smart Folders, and a weekly scheduler keep recurring downloads hands-off. Every setting is editable in the browser, the log streams into the UI, and a crash-safe journal resumes an interrupted job article by article. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. GPL-3.0 licensed.