Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
The Y Combinator Database - The definitive database of YC companies with all the metrics
Startup Tracker - The startup search engine 🎯
Startup School - How to start a startup, by Y Combinator
FundingPath - Tech company valuations visualised
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.