How much does it cost to build the world’s hottest startups?
The Next Web
DECEMBER 2, 2013
Assume $160 for a Ruby on Rails course plus free Heroku, a cloud platform as a service that allows you to instantly deploy an app. Founder Kevin Systrom launched Instagram with 25,000 beta users on October 6, 2010; two years later, the app continues to see massive growth, recently reporting 150 million active users. 3) Facebook.
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