SaaS for Custom Classification Models

I am thinking of building a SaaS tool where customers use it to build custom AI models for classification tasks using their own data (mainly for text/document classification at the beginning but it could expand to other types of classification). I plan to use a new proprietary algorithm I am working on developing. Let's assume the algorithm works well in terms of accuracy and low complexity. I saw few other SaaS with similar offerings. What kind of customers usually want this? what is their main pain point that this could help with? and what industries are usually has high demand for solutions like these? I have general idea for answers to these questions probably around document classification or product categorization but let's hear from you guys.