Tlon
Tlon↗ is the company responsible for creating Urbit, Landscape, Groups and Talk. Tlon offers Urbit hosting for free, which includes a planet of your choice.
Red Horizon
Red Horizon↗ is the Urbit arm of Chorus One↗, a community of ambitious, self-reflective people building core infrastructure for decentralized networks. Red Horizon offers Urbit hosting for free, including a planet.