When comparing Subsonic vs Jellyfin, the Slant community recommends Jellyfin for most people. In the question“What is the best home media server?” Jellyfin is ranked 1st while Subsonic is ranked 3rd.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Can be accessed via browser
Allows accessing all music from anywhere where there's an Internet connection.
Pro On-the-fly re-sampling
Bitrates can be lowered on-the-fly via ffmpeg encoder so it can be used even if bandwidth is limited.
Pro Can be accessed with any network-enabled media player
Pro Supports all audio and video formats that stream over http
Pro Support for ratings
Pro Playlists created can be shared with others
Pro Allows apps pre-caching of tracks
Create a playlist and pre-cache all tracks on your mobile device.
It is also possible to update playlists and automatically keep the pre-cache in sync.
Pro Open source
Pro Includes an embedded Flash player
Pro Open source
Pro Completely private
Doesn't phone home.
Pro Easy to set up
Setting up tv series and movies take little effort to set-up.
Pro No hidden costs
It's FOSS and doesn't require you to spend money to do anything.
Pro Good emby fork
It is a fully open source fork of emby.
Pro Portable version
This version runs on systems with a .NET Core runtime.
Pro Less intensive/more flexible options for transcoding
More control over transcoding and seems to transcode far better on lower spec hardware (eg SBC) than other packages (eg Plex).
Pro Standalone, no third party servers
If you stream outside of your local network, there are no third party servers involved.
Pro Direct streaming
If you stream outside of your home network, it is a direct connection with no third party servers involved.
Cons
Con No longer open source
Con ADs
Until you buy a license key you will have ADs in the Webinterface.
Con Streaming outside of your home is complicated
Unless you enable unPnP which is a security risk, you have to manually port forward or setup a remote server yourself. And unless you know what you're doing, you might open your network to potential hackers. Make sure to read up on reverse proxies or how to set up a vpn with Jellyfin.
Con Some poor clients
The AndroidTV-client is terrible.
Con No free services
It has no free with ads services like Plex.
Con Less features than Emby
Con Slow web interface
For large media libraries, on lower spec hardware (eg SBC), images can take some time to initially load when changing pages/sections (v10.6.4).