Swimply was founded in 2018, and has provided people with an aquatic escape for the past five yearsSwimply Founded in 2018, Swimply allows homeowners to rent out their private pool to strangers. Maryland residents have issued complaints about noisy "raucous" guests renting their neighbors' pools. Local governments, including the state of Wisconsin, are seeking to regulate the practice of renting out backyard pools for extra cash. A rental platform for private pools is helping homeowners earn extra cash from their backyard pools — but some unhappy neighbors are saying it's a source of disruption.Founded in 2018, Swimply allows users to list private pools out to strangers, who can rent them at hourly rates to host pool parties or simply enjoy a cool swim on a hot day.