There's this wiki (I forget the link sorry) that always gave me the impression that it was made by people disgruntled they were turned away from wikipedia for original research, that's full of original research by self-styled experts. I'm sure you could write an article on yourself there, after all who's more an expert in yourself than you?

The only viable and useful alternative to Wikipedia that I found is https://golden.com/ (it somewhat loads slow for me but it is useful.)

Often when I search for startups and their founders I can't find information about them on Wikipedia but I find it on Golden.

It's incredibly telling that the alternative you seek is a for-profit firm built on datamining other site's data without permission...

>without permission

If it is without permission than it is illegal and people can sue otherwise web scraping is legal.

How is it genuine to write information about yourself in such a way that it seems crowdsourced?

My idea was to have Wikipedia like platform where you could write about yourself and then have your friends, family and colleagues confirm that information or vouch for that. You can even turn things around and give permission to your friends, family and colleagues to write and maintain Wiki page about you.

I don't use LinkedIn but when I stumble upon someone's page, I often see testimonies from their work colleagues about them.