I like docspell. It’s pretty similar.

What about nocodb? See this image. It’s AGPL-3.0 licensed.

I bet none of my contacts made an informed decision about which chat app they are using. I don’t think that this really bothers one of them. Most of them do not know, what the difference between Insta-pms and Whatsapp even is, as far as security and privacy are concerned. And from my point of view I don’t know it detailed enough too. Making an informed decision about a closed source software and as a non technical person is not as easy as you may think. At least from my point of view.