There are currently three major proposals for missions to Mars, viz. Inspiration Mars, which is a Mars circum-navigation proposal by aerospace engineer, entrepreneur and astronaut Dennis Tito, The Mars Society's Mars Direct plan, led by Robert Zubrin, and The Mars One mission, proposed by Bas Lansdorp of the Netherlands-based Mars One Foundation.
Inspiration Mars plans to utilize the Falcon Heavy and the SpaceX Dragon crewed spacecraft,as well as an inflatable habitat. All three are still under development.
Despite the current lack of testing and certification, the Inspiration Mars mission's architecture has two advantages over the others. It is the only one of the three programs on a fixed time schedule, and it utilizes launch technology that is nearing completion. However, should any one of the three new systems fail to meet the deadline, especially the Falcon Heavy, the entire plan would be endangered.