When comparing Plex vs FairEmail, the Slant community recommends FairEmail for most people. In the question“What are the most useful Android phone apps?” FairEmail is ranked 4th while Plex is ranked 21st.
Ranked in these QuestionsQuestion Ranking
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.
Pro Open source
Pro Multiple account support
Multiple identities per account, notifications per account or contact.
Pro Fast and customizable
Privacy features are excellent.
Pro Identities support
Pro Two way synchronization
Pro Flat conversation threading
Pro Encryption support
Supports standard OpenPGP encryption for total privacy.
Pro Support for safety and low-bandwidth
Allows to configure maximum size of email downloaded immediately.
Pro Can show plain text of html mails
Con Needs registration
You need a PLEX account even if you use it on your local LAN.
Con Proprietary 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).