SpaceX is a government-contract-powered aerospace manufacturer whose reusable launch system succeeded where others failed — not because of vision alone, but because NASA paid for development, testing, and flight operations while Starlink created a parallel revenue stream. Its Mars and Starship ambitions remain outside this economic reality.
Tesla is not a software or AI company—it is a vertically integrated hardware manufacturer whose valuation rests on future scale, not current unit economics. Its founders were Eberhard and Tarpenning. Musk joined in 2004, led funding, took control, and shaped its public narrative. It sells cars, batteries, and solar—but publishes no per-product margin data. Its market dominance is financial, not operational.