Based on our record, Y Combinator Co-founder Matching seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
One idea I just remembered is to find a business co-founder that already knows a market well and sees an opportunity. Startup School's co-founder matching service is quite good. Source: over 2 years ago
CoFoundersLab - Meet 250,000+ entrepreneurs online
Founders Nation - Find or become a startup cofounder
Startup Stash - A curated directory of 400 resources & tools for startups
Supersourcing - Supersourcing is a platform that allows you to hire a professional freelancer in many fields.
Find A Maker - find a partner for your next project
StartupResources.io - Tightly curated lists of the best startup tools