Nothing such as absolute trust. It has to be a relative comparison. For me it is Apple, Google, Facebook in that order.

Purism: https://librem.one/

Any social with a monthly fee is not going to hit the same network criticality that makes Facebook reign supreme. Attracting people to a new service is hard enough tell them it'll cost 50$ a year and it's hopeless.

The network is not the same thing as the provider. Anyone can use Mastodon for free, so Purism is part of a larger network than just Purism.

Any social media company whose business isn't renting your eyeballs to the highest bidder.

Any examples?

I was mainly kidding, but you could look at Signal as a company like that.

Y Combinator?

None, obviously.

The Masons.