Experts in the field of wireless power transfer expressed skepticism about uBeam's technology, questioning the efficiency and safety of using ultrasound to transmit power over the air. Some argued that the physics involved made it inherently difficult to achieve practical results.

Reports emerged alleging that uBeam had presented misleading demonstrations of its technology to investors and the public. These accusations raised concerns about the company's transparency and the accuracy of its claims.

In addition to the technical criticisms, uBeam faced allegations of a toxic work environment, with some former employees describing a culture of pressure and unrealistic expectations.

The controversies surrounding uBeam significantly damaged Meredith Perry's reputation as an entrepreneur and inventor. The failure of the company served as a cautionary tale in the tech industry, highlighting the importance of transparency and realistic expectations.