I think it could work well (is my case actually). A lot of SaaS is just a simpler/different take on a big one. For example, mine is way less powerful than Fres

I think it could work well (is my case actually). A lot of SaaS is just a simpler/different take on a big one. For example, mine is way less powerful than Freshbooks/amazon. I still live from it for the last 20 years with less than 100 customers (and a lot of time just less than 50). Having a niche or just being available to your customers on the phone and solving the issue in the next minutes/hours is enough to keep customers and run your business. Now, the big issue is that you are growing without the capacity to grow, and then you get a big competitor in your nose and you try to catch it. That is death. Do not try to catch the bunny. Be the turtle and forget about the race, at all.