Hyatt Hotels Corporation has taken a minority investment stake in Oasis, which rents out 2,000 homes in 20 cities. The goal is to “serve high-end travelers across more dimensions of their lives,” said James Francque, head of transactions at Hyatt.

Local staff at Oasis properties, called sidekicks, act as registration desk, bellhop and concierge, meeting guests at the property to check them in, showing them the amenities on site and offering advice on local attractions and restaurants. Oasis’ home page displays the Hyatt brand, and World of Hyatt loyalty program members can earn or redeem points on Oasis stays. The partnership with Oasis also offers Hyatt guests some options in cities or neighborhoods that currently lack Hyatt hotels, Mr. Francque said.

Marriott International recently started a six-month experiment in London with about 200 homes managed by HostMaker. The homes are grouped with the Tribute Portfolio Hotels collection, which Marriott acquired from Starwood in 2016. The Tribute Portfolio Homes, as they are called, offer personal check-in, professional cleaning services and on-call service help, and meet a list of safety and security standards. Homeowners are offered advice on how to design their properties to improve the guest experience.

A curated and managed collection of homes can help travelers who don’t always delve into the fine print or know all the questions to ask, said Cathy Enz, a professor at Cornell University’s School of Hotel Administration. A female college student of hers, who had rented an Airbnb for herself this summer during an internship in Los Angeles, was aghast, she said, to learn that several male guests would also be living there during her stay.

“The description didn’t offer any clue that there might be other people staying in the apartment,” Dr. Enz said.