With today’s news of Letterboxd being acquired by an investment company, I got to wondering if I should start weaning my movie obsession off of there and onto something more open before the inevitable enshittification begins. I did a cursory search and found nothing promising, but figured the braintrust here might know something I don’t!
I think the closest you’ll get to an “open” platform right now is the community-maintained https://www.themoviedb.org/. Their API is also free for non-commercial use.