When comparing Roku vs Plex, the Slant community recommends Plex for most people. In the question“What are the best TV streaming solutions?” Plex is ranked 2nd while Roku is ranked 3rd. The most important reason people chose Plex is:
It's pretty hard to find a NAS or STB that doesn't support Plex.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supported on many devices
It's pretty hard to find a NAS or STB that doesn't support Plex.
Pro Accessible via web browser
A modern web browser is enough to get everything Plex has to offer.
Pro Added lots of media databases
Metadata for media files will automatically be updated by using media databases. This provides posters, movie trailers, descriptions, information about actors, etc.
Cons
Con Easy to accidentally change channel
It's very easy to accidentally sit on the remote, and stop your video, or exit the channel. Apple Remote does not have this problem.
Con Frustrating & complex remote design
For some apps like YouTube, left and right switches videos. While left and right on Netflix will fastforward/rewind. Apple Remote is a better & simpler design, a direction pad & select button is all you need.
Con Not a hobbyist platform
It's next to impossible to alter the core of the Roku, like create custom notifications. While new channels can be made, existing ones can't be modified.
Con Needs registration
You need a PLEX account even if you use it on your local LAN.
Con Proprietary software
Unfree software.
Con No gapless audio-playback
Plex still does not support gapless playback of audio files such as mp3 or FLAC.
Con Playback error: This server is not powerful enough to convert video
More hardware requirements on Plex due to a useless/non-intuitive transcoder. When using lower spec hardware (eg SBC) Plex will not transcode or play HD+ videos. When compared to other packages (eg Jellyfin which transcodes nicely using FFMeg), Plex falls short on video playback and transcode settings to get videos to play (fastest/lightest option still fails).