IANAL and also have no experience in this, but there is such a thing as patent and IP insurance. Both offensive and defensive. I am sure there are also companie

IANAL and also have no experience in this, but there is such a thing as patent and IP insurance. Both offensive and defensive. I am sure there are also companies that can perform code audits to find potential infringements early at varying degrees of quality. That of course all costs money. The other important thing is to have appropriate incorporation and liability insurance once you are actually exposing yourself as an entity.