HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
The Y Combinator Database - The definitive database of YC companies with all the metrics
AlgoExpert.io - A better way to prep for tech interviews
Y Combinator Companies - Interactive list of all 1000+ YC companies
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
Unicorn Republic - List of startups that evolved into $1 billion+ corporations