I was playing around with Custom GPTs and made one that helps you find fit with an ideal co-founder. It asks you 10 questions compiled by Y Combinator and then evaluates your compatibility with other potential co-founders. Best part? It has long-term memory, so you can answer questions once and then check your compatibility with others multiple times, anytime. I know it was more of a 'nerdy' part rather than 'best'. Anyway, check it out and let me know what you think!
Inspired by the Co-founder Matching platform by Catheryn Li and the team.