Indie Hackers is a place where the founders of profitable businesses and side projects can share their stories transparently, and where entrepreneurs can come to read and learn from those examples. It's also a community where individual "indie hackers" come together to share their experiences, give and receive feedback, and rely on each other for support.
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.