The best alternatives to Office Unbound are Topia, MyNomadHouse, and The Tactic 2.0. If these 3 options don't work for you, we've listed a few more alternatives below.
MyNomadHouse.com is a website where you can exchange your house or room with a digital nomad traveling to your city or town. There is a list of digital nomads posting their houses and rooms, looking for another digital nomad looking to exchange their house.
A collaborative website that connects digital nomads with great tools to work remotely, find jobs, and connect with other like-minded people. Members also share their stories and advice, exchange ideas, and meet up.