I can confirm that. I live in France, and Pride in my (quite small) town doesn’t have a single private sponsor. It’s all organized by a non profit organization, gathering the various local LGBTQIA+ associations, and associations for STI prevention, human rights activists, feminists and so on.

Before the procession starts, there’s a small fair in a public park with (free) stands for all these associations, and stands where goodies are sold to finance the event.