Some of the biggest companies in the U.S. are in hiding — or at least, you might think so when you want to talk to a real person at one of them. Phone numbers are often tough to find, and if you do uncover one, it could lead to a voice-menu system that tries to placate you with recorded messages. That's why GetHuman is so essential. It provides numbers for thousands of companies, from AT&T to Zynga, plus information on which buttons to press to reach a human and how long you're likely to wait on hold. Users can also vent by writing customer-service reviews; they're pockmarked with phrases like "What a nightmare!"