It depends upon how the service works.
A "scrivner" is permitted, but "legal services" are not. If, for example, it asks you the questions on a state approved form and asks you to fill in answers and the compiles the answers into a complaint with the proper typesetting, this would be permissible.
It could also have "educational materials" which you could read that could discuss small claims court.
But, if it provides individualized assistance on a case by case basis on how to answer the questions, for example, prodding you to say something about each element of a cause of action if you fail to do so, this might very well constitute the practice of law and be illegal.