We write a lot about the growth in the number of APIs on ProgrammableWeb. But how about usage? Some APIs see so many requests that they measure in billions. We refer to these companies as the API Billionaires Club. The image below, which comes from ProgrammableWeb Founder John Musser's talk later today at Glue, shows the big names that make up this exclusive club.
User authentication in apps is a pain, even if you've built an authentication system dozens of times. Forms, sessions, user tables, validation, password management, the list goes on in the seemingly never-ending to-do list for setting up a simple signup, login, and logout system for your app. OpenID company Janrain makes it easier, building on top of social networks.