Many of the most successful technology enterprises were launched as products, observes Marc Andreessen, serial entrepreneur, including Facebook, Twitter, and others. He states that tools created this way are based purely on market demand, making these applications much more compelling. To the contrary, companies that establish themselves first and then work to craft an application have their achievements, but they are more likely to plummet into failure. Entrepreneurs approaching from this angle can too often fool themselves into believing they have a tool of value.