What were the most ridiculous startup ideas that eventually became successful?

获得303好评的答案@Suren Samarchyan

"In April 2011 Evan Spiegel stood up in a Stanford product design class to present an idea for his final project. It would be a mobile app, he explained, where friends could share photos that would disappear—forever—in a matter of seconds.

"Everyone said, 'That is a terrible idea,'" Spiegel remembers. "Not only is nobody going to use it, they said, but the only people who do, will use it for sexting." A venture capitalist sitting in on the class said it could be interesting, if he made the photos permanent and partnered with Best Buy. Spiegel nearly gagged."

获得14.8k好评的答案@Michael Wolfe

Amazon - we'll sell books online, even though users are still scared to use credit cards on the web. Their shipping costs will eat up any money they save. They'll do it for the convenience, even though they have to wait a week for the book.

iOS - we are shipping a brand new operating system that doesn't run a single one of the millions of applications that have already been developed for Mac OS, Windows, or Linux. Apple has to approve all of the apps, and it won't have cut and paste to start with.
iOS——我们在推出一款全新的操作系统,它没有运营任何一个已经在Mac OS、Windows或Linux上已经在使用的应用软件。苹果要认证所有的APP,而且它不需要从剪切和粘贴来开始。

Google - we are building the world's 20th search engine at a time when most of the others have been abandoned as being commoditized money losers. We'll strip out all of the ad-supported news and portal features so you won't be distracted from using the free search stuff.

Firefox - we are going to build a better web browser, even though 90 percent of the world's computers already have a free one built in. It's based on a product that a single college student built.