Ask HN: What wiki/intranet do you use at your company?

At my new company we're looking to adopt an internal wiki/intranet and I was wondering what do you guys use where you work?

I know that big companies like Facebook have built their own solutions but curious to see what other companies use. For example, I recently came across Stripe's Home (https://stripe.com/blog/stripe-home), which seems to be their own internal version of a wiki/intranet.

Curious to hear about what solutions you've considered and/or what you like/dislike about what your company currently uses(:

Edit: Some people apparently just use Notion and/or nothing and just share docs with each other. Also curious to know if this is your experience