Amazon has acquired robotics startup RIVR, a developer of quadruped robots designed to deliver packages directly to customers’ doorsteps, marking the company’s latest move to automate the complex final stage of e-commerce logistics.
Financial details of the acquisition were not disclosed. The deal brings RIVR’s technology and team into Amazon’s growing robotics organization, where the company has spent years experimenting with new forms of delivery automation.
RIVR’s robots are designed to navigate real-world urban environments, including stairs, curbs, gates, and uneven terrain that often challenge traditional sidewalk delivery robots.
The acquisition reflects Amazon’s continued effort to rethink last-mile delivery, one of the most expensive and operationally difficult parts of the logistics chain.
From Research Lab to Last-Mile Robotics
RIVR traces its roots to research conducted at the Robotics Systems Lab at ETH Zurich, which developed advanced quadruped robots capable of navigating challenging environments.
The company originally emerged under the name Swiss-Mile before rebranding as RIVR in early 2025. Its robots combine wheels and legs, allowing them to travel quickly on flat ground while maintaining the ability to climb stairs and step over obstacles.
The current system, known as RIVR TWO, carries packages in a cargo container mounted on top of the robot. The hybrid design allows the robot to move at speeds of up to roughly 15 kilometers per hour while maintaining flexibility in complex terrain.
Unlike many delivery robots that operate primarily on sidewalks or smooth surfaces, RIVR’s approach aims to solve the “last few meters” problem in delivery logistics, where stairs, narrow pathways, and gated entrances often prevent autonomous systems from reaching a customer’s door.
The company previously tested its robots in real-world delivery programs. In 2025, RIVR worked with parcel delivery platform Veho to pilot operations in Austin, Texas. It also partnered with food delivery platform Just Eat Takeaway.com to introduce the robots in European cities, beginning with deployments in Zurich.
Amazon’s Continuing Delivery Robotics Push
The acquisition builds on Amazon’s long-running investment in robotics across its logistics network.
Inside warehouses, the company operates hundreds of thousands of mobile robots that assist with inventory movement and order fulfillment. However, automating last-mile delivery has proven significantly more difficult.
Amazon previously tested its own six-wheeled delivery robot, Scout, in several U.S. cities before discontinuing the program in 2022 after determining the system did not meet customer expectations.
RIVR’s approach may offer a different path. By combining legged mobility with wheels, the robots are designed to operate in environments that were previously inaccessible to small autonomous vehicles.
Amazon had already been tracking the company’s development for some time. In 2024, Jeff Bezos participated in a $22 million seed funding round through Bezos Expeditions, alongside investment from the Amazon Industrial Innovation Fund.
Physical AI Meets Real-World Logistics
The acquisition also highlights a broader shift in robotics development toward what many researchers call physical AI – systems that combine advanced machine learning with robots capable of interacting directly with the physical world.
RIVR’s founder and CEO Marko Bjelonic described doorstep delivery as a practical environment for developing such systems because it requires robots to operate in unpredictable outdoor settings filled with obstacles, varying terrain, and human activity.
If Amazon succeeds in scaling such robots, the technology could help address rising delivery volumes while reducing the cost and complexity of last-mile logistics.
For now, however, the acquisition primarily signals continued experimentation. As with many robotics initiatives at Amazon, the path from prototype to large-scale deployment may take years.
Still, the move suggests that the company sees legged robots as a promising candidate for solving one of e-commerce’s most persistent challenges: getting packages all the way to the front door.