Founders Nation - Find or become a startup cofounder
Investor List - A searchable, crowdsourced list of over 1k investors
CoFoundersLab - Meet 250,000+ entrepreneurs online
Investor Scout - A database of 45k+ investors to raise your seed round 💰
Findnlink - Find people to work with on your ideas.
OpenVC - 2200+ VC firms by thesis to find 'best fit' for your startup