Lots we haven't heard of, since they're working on interesting problems and not getting rich. Partly because "we" (HN) are biased toward consumer-facing web st

Lots we haven't heard of, since they're working on interesting problems and not getting rich. Partly because "we" (HN) are biased toward consumer-facing web startups, which are typically not the sort of companies started by academics, or people with extensive knowledge of a non-web industry. There are many startups out there that "we haven't heard of", but still end up solving valuable problems, and quite a few of them get rich as a result.