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Drew Houston built Dropbox with his CTO whom he had known for less than a week.

• gus_massa 9y ago
  He had a working prototype before submitting his application to YC. That is a big difference.
  • sahawneh 9y ago
    We have one too.
  • sahawneh 9y ago
    Boom, who are building supersonic airplanes, also got funded by YC without a prototype, just the same as many other startups. Don't be discouraged from applying just because you don't have a product yet. Many prototypes can be built in a day.