His moat is his price. And it absolutely is a moat because most bigger competitors would not bother competing in the segment with even lower prices, as there’d be no upside
His moat is a combination of pricing + cost structure + time spent to cumulate the customer base.
If someone were to enter the market and try to take his business, they will have to consider if their conditions can result in the same offerings. I don't think it's easy to match the same offerings.
Indie hackers frequently think they can build tools like this in a month (hence the "I could build that in a weekend" trope). But making something that actually works well takes time (that this founder has taken).
His moat is a combination of pricing + cost structure + time spent to cumulate the customer base.
If someone were to enter the market and try to take his business, they will have to consider if their conditions can result in the same offerings. I don't think it's easy to match the same offerings.