As for Kodi, it's somewhat of a different class of software to Plex/Emby/Jellyfin - Kodi is more a player interface for local files and with the option to install plugins to play from other sources like DLNA, or even from Jellyfin [1] (and I assume Plex and Emby as well)

Jellyfin is more a network player - your jellyfin server does the heavy lifting, like transcoding etc. so your client basically just needs a web browser (though there are native apps too).

1: https://jellyfin.org/docs/general/clients/kodi.html