Semantic Scholar is a great alternative to Google Scholar to use. Since it is free to use, you can use Semantic Scholar to be able to find related papers to certain search terms.
However, Semantic Scholar has the additional benefit of being AI-powered instead of keyword-powered. This means that it is more likely to find papers that are related to the same topics but do not use the same keywords that you are searching.
Additionally, Semantic Scholar is used by many other apps including Elicit and Research Rabbit as their database for articles.