It is so tempting for young companies to try to serve a broad market, thinking that they can make more money where there is a gigantic opportunity. But a one-size-fits-all product or offering doesn't really work anywhere, and the cost to support different offerings for different segments (say, small businesses vs. enterprises, or high-end consumers vs. bargain shoppers) is just too high for a growing company.
The big guy competitors that serve different markets didn't start out that way, either. If you dig into their histories, you will inevitably find they started in a niche, and when they had built up some cash reserves, worked their way out into other markets -- either organically or by buying other businesses.
Take some time, do some research, and ask your advisors: Which is the one market where we can get the best traction now? Then make the hard choice -- narrow your target market, offer the best products or service you can for that market, and figure out the best way to communicate with those prospects.
Greg Head in New Avenue blog tells a story of two entrepreneurs, one who focused and one who couldn't. Believe him when he says, "Of course, it’s hard to decide to narrow your focus as a company: hard
on the ego, hard on short-term sales, hard on the customers you leave
behind. But it quickly makes your business easier to run: easier to
communicate to the market, easier to execute, easier to please your
customers, and easier to grow in the long run."