Tesla's Robotaxi Ambition Faces A New Threat: A 50,000-Vehicle Alliance

But Rivian and Uber are taking a different route—pairing vehicles, platform, and network upfront. Uber brings demand. Rivian brings hardware. Together, they're attempting to compress the timeline between development and real-world deployment. And with a defined rollout plan across multiple geographies, this looks less like experimentation and more like execution. This isn't another prototype or pilot. It's scale. Rivian and Uber say they plan to roll out up to 50,000 R2 robotaxis across 25 cities spanning t ...