Proof of demand (0)
An idea is confirmed by other people's money, not by our opinion. Everything here is verifiable through a link: companies Y Combinator backed for the same problem, and user counts of working products. If someone already funded the problem or tens of thousands already use it, the demand is real.
All
backed by Y Combinator 25
launch story 53
competitor with customers 1157
competitor ads 13
public revenue 222
extension users 315
Empty for now: proofs are collected together with idea validation.
Sources: the open Y Combinator portfolio dataset (refreshed daily) and public Chrome Web Store pages. Whether a company actually solves the problem is checked by a separate model call and signed off as same / adjacent - only same makes the catalog.