The best alternatives to Stayawhile are Airbnb, Alfred, and Loftium. If these 3 options don't work for you, we've listed a few more alternatives below.
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Tanka— Tanka = Slack + Glean, built for fast-growing startups.
Loftium is service that offers a down payment to those willing to rent an extra bedroom in your new home on Airbnb for 12-36 months and share the profits.