Airbnb is carrying a $25 billion valuation, and has a legitimate shot at justifying it in the coming years. They own their segment like an eBay or Uber, their network effect has won.
Was Reddit once the top start-up out of Y-Combinator, years ago? I'm skeptical of that having ever been true as well.
Although they're really really really not by today's standards, as you point out.
* Memamp - desktop search: failed to launch, remaining founder hired by reddit
* Infogami - something between a blog and a wiki: merged with reddit, became reddit wiki
* Firecrawl - security software: pivoted and became TextPayMe - mobile payments: acquihired by Amazon, merged in to Amazon Payments
* Loopt - mobile location sharing: acquired by Green Dot for $43.4 million
* Kiko - online calendar: launched shortly before Google Calendar, sold to Tucows for about $250k
* Clickfacts - advertising fraud detection: operated independently for years; now appears defunct
* Simmery - can't find anything on what this company was making: defunct
[0] https://groups.google.com/d/msg/comp.lang.lisp/vJmLVd9lJyk/1...