You can start a new startup from technology or from a market need. Start with market first, the question you should be asking is "who needs to communicate priva

You can start a new startup from technology or from a market need. Start with market first, the question you should be asking is "who needs to communicate privately, wants to pay for it, and was not able to do that so far in a satisfactory manner?". Once you figure it out you might realize that most of the "it's impossible to do perfect, hence no point in doing it at all" concerns while generally valid do not apply to your target market. And from there it's perfectly doable and might be a good business too. edit: doesn't have to be about email either - the need is first and foremost. it could be well just a private messenger platform.