Startup School is a free online program and global community of founders.

Y Combinator is an American seed accelerator launched in March 2005 and was used to launch over 2,000 companies including Dropbox, Airbnb, Stripe, Reddit, Optimizely, Zenefits, Docker, DoorDash, Mixpanel, Heroku.

a database of 1317 companies who went throught the Y Combinator accelerator program between 2005 and 2017 and a whole bunch of metrics about them

Work at a Startup - from Y Combinator is a common application to apply to hundreds of top startups. How it works: Applicants fill out an application with their background and experience. Then, Y Combinator-alum companies browse through applications and start a conversation with people they are interested in.