Target businesses, not consumers. It is enticing to build a consumer-oriented service when you have a great idea and a strong team to implement it. The problem is that revenue per customer is low and you will need to attract a lot of users to offset costs and reach profitability. Your runway to success is basically as long as your cash lasts. This is quite a concern if you are an unproven entrepreneur, do not have a large amount of savings, and do not have accesss to a powerful network of people. While you will need to have strong sales skills, businesses are more likely than the average consumer to pay for your product. Your revenue per customer is higher and the burn-rate (servers, bandwidth) is probably going to be much lower.