One frequent exercise that I do with my colleagues who work with startups at ideation stage is to imagine how the value proposition could be challenged by a pop

One frequent exercise that I do with my colleagues who work with startups at ideation stage is to imagine how the value proposition could be challenged by a popular IM such as WhatsApp or WeChat. We would ask ourselves: "Could process A be replaced by WhatsApp in this or that way?" If the answer is Yes, then we would advise stakeholders to rethink that process or functionality to make it unchallengeable by the IM in the short run.