Boeing's Starliner will make its first crewed launch as soon as May 6, about four years after SpaceX's. Having two private astronaut taxis will provide redundancy for ISS operations and more.

2 astronaut taxis: Why NASA wants both Boeing's Starliner and SpaceX's Dragon

Source: space
Source Link: https://www.space.com/nasa-boeing-starliner-spacex-dragon-iss-astronaut-mission-redundancy