Y Combinator Startup School is a free online program and global community of founders. You can join their free lessons and get advice on how to start a startup and meet with other founders through weekly live video chats. Well-known start-up such as Airbnb, Stripe, Coinbase etc were the alumni of Y Combinator. Cyberport alumni such as TeamNote, MailTime and Trusu were also admitted to their accelerator.