Viral effects are different than network effects, but many people confuse the two because they are Viral Effects both positive feedback loops, and because they were experienced together in famous companies like Facebook, Twitter, and WhatsApp over the last 15 years. & Virality Viral effects are about growth -- when existing users bring you more new users for free. Read more about viral Network effects are about defensibility: a product gets more valuable when more people use it. A effects & virality product or service with viral effects has a “viral coefficient”, which is the number of new users that join as a result of each user. New Users New Users 39