Spotify economics without the subscription or catalog gaps: Navidrome, the reference self-hosted music server, streams your own FLAC, MP3, and ALAC collection from a single Go binary with a React/Material UI web player. Its Subsonic/OpenSubsonic API compatibility is the superpower: 50+ existing clients work out of the box, from Symfonium and DSub on Android to Feishin and Sonixd on desktop, plus Android Auto, CarPlay, and Android TV apps. Transcoding is server-managed and FFmpeg-backed - FLAC direct-plays at home and downsamples to MP3, AAC, or Opus over mobile bandwidth, with the OpenSubsonic transcoding extension letting clients declare capabilities and receive per-track direct-play or transcode decisions automatically. Multi-user support gives every account its own play counts, favorites, ratings, and playlists, and multi-library support scopes different collections to different users. The feature list covers serious listening: Last.fm and ListenBrainz scrobbling, artist bios and images, embedded and external lyrics, audiobook bookmarks, saved play queues that resume on another device, internet radio, jukebox mode, and M3U playlist auto-import kept in sync with your folder. Resource usage is famously low - it runs happily on a Raspberry Pi and scales to six-figure track counts.

Whether your personal audio library spans ten thousand lossless FLAC albums or a sprawling hierarchy of studio recordings, Polaris streams your entire music collection to any browser or mobile device with instant responsiveness. You can browse cataloged tracks by album, artist, genre, or raw directory tree without waiting for sluggish page loads. Multi-value metadata indexing cleanly separates collaborations across artists, composers, record labels, and lyricists. A structured query bar filters songs using per-field search operators and boolean combinators. During playback, real-time audio waveform visualizations render signal peaks directly inside the scrubbing bar. Lossless and compressed formats play seamlessly, covering FLAC, MP3, MP4, M4B, Ogg Vorbis, Opus, Musepack, APE, WAV, and AIFF files. Each household listener gets an isolated account with private playlists, dark mode themes, and customizable color palettes. Administrators can edit mount points, user credentials, and dynamic DNS hooks either through the web settings panel or a plain-text configuration file. Mobile listeners can also connect from dedicated Android and iOS companion apps on the go. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.