The term startup refers to a company in the first stages of operations. Startups are founded by one or more entrepreneurs who want to develop a product or service for which they believe there is demand. These companies generally start with high costs and limited revenue, which is why they look for capital from a variety of sources such as venture capitalists.
Startups are companies or ventures that are focused on a single product or service that the founders want to bring to market. These companies typically don't have a fully developed business model and, more crucially, lack adequate capital to move onto the next phase of business. Most of these companies are initially funded by their founders.