Plex Inc. is not a good company. They are eager to collect and sell your data to advertisers. Jellyfin is a great alternative.
Plex may share Collected Information as expressly set forth in this Privacy Policy, including the following limited situations: [...] With third parties to improve and deliver advertising to you on our behalf.
Plex may also use third-party advertising companies to serve ads, which may, directly or indirectly, collect or use information about user visits to websites and mobile app usage over time and across non-affiliated websites and mobile apps to display advertisements more tailored to users’ interests on this browser or device, and those browsers or devices associated with it.
As lousy as Plex (both the company and the product) have become, there really aren't alternatives with feature-parity available. Jellyfin is starting to get there in terms of basic media center functionality, but still faces stability and platform compatibility issues that have been long-solved by Plex. Jellyfin also lags behind in ecosystem support/integration for those of us operating media servers with heavy amounts of automation and dependencies on workflows executed by 3rd party packages.
Here's my data point: I use Jellyfin and I am satisfied with it.
My use case: movies and TV shows, streaming from mobile, PC, or smart TV with auto-downloaded subtitles and varying stream quality. Heavy use of the "watch together" feature. (Plex watch together is horrible compared to Jellyfin.)
What is particularly lousy about Plex as a product? Overall I'm quite satisfied with it, it's gotten better over the past few years noticeably I felt with the downloads actually working, collections, more suggestions, etc... I will say the genre filter for movies/shows is quite useless though.
where "my data" means a record of the shows i watch.
i'm okay with that. the shows i watch don't need to be a secret. i want advertisers to know what i watch, so more of that sort of TV gets made. If Plex can make money off this information, and give me a good service in exchange for that, it seems like an arrangement that benefits us both. what's the problem?
* notatoad watched show X-Episode 5 on 28-July-2023 at 8pm. We can also correlate that that they used UberEats to order Thai Cuisine at 7 pm on the same day, and that a certain group he belongs to was Y% more likely to buy the product placed within that show.
The second kind of information will be used in the future against you, to extract the maximum amount of money from you for services that "you just can't miss", after being bombarded with ads and social media influencers in sufficient quantity.
I used to order Chinese take out to watch every new episode of Burn Notice. I’m not concerned about companies knowing this and using it “against me” in targeted advertising.
Plex may share Collected Information as expressly set forth in this Privacy Policy, including the following limited situations: [...] With third parties to improve and deliver advertising to you on our behalf.
Plex may also use third-party advertising companies to serve ads, which may, directly or indirectly, collect or use information about user visits to websites and mobile app usage over time and across non-affiliated websites and mobile apps to display advertisements more tailored to users’ interests on this browser or device, and those browsers or devices associated with it.
More in the "Data We Collect" section: https://www.plex.tv/about/privacy-legal/