In the past, I went out on a mission to start a department at an existing company. That failed and went on to try at several other companies. One thing I learne

In the past, I went out on a mission to start a department at an existing company. That failed and went on to try at several other companies. One thing I learned very quickly is the most important thing to have is perseverance. Many people will say no, many people will be uncertain. Even if you get to the stage where your foot is in the door, don't forget to keep pushing and pushing. Decision makers and gatekeepers are very busy people, it's not they they won't like your idea, it's that it won't be top-of-mind, so keep pushing. Another thing to note is it's risky, in terms of brand dilution (Excluding FB or Google) - companies don't want to risk being associated with a shitty product (not that I'm saying yours is, but they don't know that), so bear it in mind and push numbers and revenue from the get go. Show them in no uncertain terms how this will make them money. Finally, sell yourself. If you want to be given an opportunity, you have to show how you, and only you, will add such immense value to this project that it can go on to be the success you're pitching it to be.