It's hard to measure "cheaper" as an end user consumer, the price you pay for the service, because it's very likely they're operating at a loss to gain market share and growth.

Exact same reason why Uber and Lyft were considerably cheaper than taxis in many big cities when they first launched (eg: Lyft in Seattle in 2013/2014), running at a loss, and the pricing has now incrementally grown to become the same as, or even more expensive than traditional meter taxis in some places.