I firmly believe that startups don’t need to obsess over a perfect name or need to buy a $5 million domain. You simply don’t. First, you’re a startup, no one really cares whether your website’s URL is dot com or dot net. Second, if you do want to change the name, do it once you have product-market fit. Focus on building a useful product first. Airbnb was Airbedandbreakfast, Uber was UberCab, Google was BackRub, for years.