Most startup advice skips the awkward part: how do you actually find and evaluate a business partner before you're legally and financially entangled with the wrong person? I've seen two kinds of founders. Those who spend six months on their pitch deck and two hours picking their co-founder. And those who treat the partner search like a hiring process with teeth. The second group builds companies that last. Here's the system that actually works. Where to Actually Find Co-Founders (Not the Obvious Places) The usual advice is "go to meetups" or "post on LinkedIn." That's fine for volume. It's terrible for fit. The best co-founder relationships I've seen come from three sources: Former colleagues. You've already seen how they handle pressure, credit, and conflict. You know if they ship or stall. Two years of working together beats 20 coffee chats. Domain communities. If you're building in ecommerce or DTC, hang out where operators actually talk — Slack groups, Twitter/X threads, niche Discord servers.…