If you're founding a startup, networking isn’t optional. It’s your lifeline. Entrepreneurs need support from all sorts of people — partners, investors, customers and employees — but most importantly, they need to tap into great communities to make those connections in the first place. 

We found 18 thriving networking sites especially for entrepreneurs to help you find advice, capital, co-founders, or just have some fun! Find the best sites for you in our latest infographic: 

18 Top Networking Sites for Startup Founders (Infographic) 

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Read Next: • The Ultimate List of Legal Resources for Startups • 7 Ways to Fund Your Startup (Infographic) • Top 10 Reasons Startups Fail (Infographic)