Sub-Zero.bundle VS bazarr

Sub-Zero has not been maintained since 2021 so I wouldn't consider that a good source.

For a more standalone way, look into Sub-Zero which was THE Subtitle plugin for plex.

Sub-Zero is a third party agent you add to your server

I did find a post, 3 years ago, in the Emby forum that this person did manage to have Subtitles in plex and they were in their own folder by using Subzero. However, the Subzero Plugin states:

It should, but you need to use Kitana to actually interface with it.

See here why it can work with the Plex Movie (Legacy) and why it doesn't work with the new Plex Movie agent: https://github.com/pannal/Sub-Zero.bundle/issues/753

I've used Sub-Zero plugin (https://github.com/pannal/Sub-Zero.bundle), it's quick and always has subs for the languages I need (english and spanish)

Sub-Zero

Not with the Plex Movie agent AFAIK. For automatic downloading, bazarr is probably the most popular choice.

I found this issue in the Github: https://github.com/morpheus65535/bazarr/issues/2187 but it's listed as closed with an explanation that poses more questions than answers.

There may be better places, since I've just stuck to the same one for years now (and don't need them often enough to look into alternatives), but I usually use either subscene or opensubtitles. There are also programs that can automate it like bazarr, but it requires you to also use Sonarr/Radarr.

Bazarr: Manages subtitles for Radarr.

look into running bazarr https://www.bazarr.media/

I use https://www.bazarr.media/, a free tool that downloads the subtitles for Sonarr series, and then has a handy took that synchronises the text to the voice. It works quite nicely.

If you don’t find a solution, try Bazarr.

Bazarr for subtitles.