When comparing MediaPortal vs Jellyfin, the Slant community recommends Jellyfin for most people. In the question“What are the best open-source media servers?” Jellyfin is ranked 1st while MediaPortal is ranked 3rd.
Ranked in these QuestionsQuestion Ranking
WifiRemote plugin that allows clients (for example an iPhone or Android app) to control MediaPortal.
Pro Web / mobile access
Remote access using your web browser, Android, iOS, and more.
Lots of plugins and skins available.
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 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 Portable version
This version runs on systems with a .NET Core runtime.
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 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).