TheKey | 36,440 followers on LinkedIn. A new chapter in home care | By the year 2050, the number of people in the U.S. age 65 and over will swell to almost 90 million, about twice the current population. For over 20 years, TheKey has helped clients achieve long-term aging at home with comprehensive, concierge-based care. As the leading private pay home care provider in the nation, TheKey is continuing to address this escalating demand with innovative leadership and a passion for excellence.