Yes!! The software market is still growing quickly.

What moat are you referring to? AFAICT, moats are bigger now than ever before, but the moats I see are centered around things like consumer habits and B2B contracts and hub/platform experiences. People tend to like the software they know & have, or the contractors they know already, even when they complain about it. The need to overcome static friction is a moat, one that makes it harder for startups to get in, but easier to stay once you’re in.

Big companies are slow. It seems like it would be easy for them to copy products, but they rarely do, and even when they try they take forever. Worry about yourself first, whether you can deliver, whether your product is superior, whether you can get customers, whether your business is sustainable, etc.. Worry about other startups second. They can copy faster than big companies. Do you have an edge over other startups? Don’t worry about the big companies. If they aren’t already solving the problem you want to solve, they won’t start until after you’re successful.

Note acquisitions are a thing! Big companies that want to copy your product are aware that the fastest way to do that is to acquire a working solution and a pile of new customers. You should be thinking about big companies more as opportunity than competition.