In search of how to bring customers to your platform were many routes suggested to me like: -Having a following on social media -Build/share on relevant communities -Run ads -Email list

I want to go as lean and organic as possibly can right now, also there are many threads in reddit that can help but they don't allow promotion of apps/website or blog. Any other way how to reach that community.

What ways have you tried to reach from 0 to 100 customers and how long it took?