Co-founders are the people involved in the initial launch of a startup company. Anyone can be a co-founder, and a co-founder doesn't necessarily have to have been there from the inception, although that is usually the case. It also does not necessarily include all of the people who were there on that first day.

What makes you a co-founder?

Co-founder is a term that exists to give equal credit to multiple people who start a business together. A co-founder may be part of the vision of a startup from the get-go, or they may be brought on very early by the original founder because they have skills the founder is lacking.

What is difference between founder and co-founder?

A founder is a person who has the initial idea and establishes a business. A co-founder is the one who goes along with that founder's initial thoughts and helps make the new company flourish.