That is a complex thing. Best way to tell is in person, use your instincts. Beside that it is often a pattern of behavior; including (not limited to) not pretending like they (or life) are perfect, reciprocity, empathy. These are the first to come to mind, will let someone else take the baton.
The company is called Salesforce. Who else can head such a beast but an incarnation of Satan himzelf.