A new wearable device called AlterEgo is being hailed as a potential breakthrough in human-AI interaction, offering what its creators describe as “the power of telepathy” — but only for the thoughts users choose to share. Developed in Cambridge, Massachusetts, the non-invasive neural interface allows people to silently communicate with artificial intelligence by detecting subtle signals in the muscles used for speech.

Unlike brain-reading devices, AlterEgo does not monitor neural activity. Instead, it interprets neuromuscular signals generated when a person thinks of words but does not vocalize them. The device, which sits over the ear, then transmits the interpreted command and sends audio responses directly back to the user. In practice, this means commands like “Alexa, what time is it?” could be issued without speaking aloud.

Arnav Kapur, the company’s chief executive, unveiled the device on 8 September and said it could transform how people interact with technology, one another, and the wider world. “It gives you the power of telepathy but only for the thoughts you want to share,” Kapur explained in a promotional video.

Researchers believe AlterEgo could have life-changing applications for people with neurodegenerative conditions such as amyotrophic lateral sclerosis (ALS) and multiple sclerosis (MS), both of which can impair speech. By offering a silent and non-invasive form of communication, the device could restore independence and accessibility for those struggling to communicate verbally.

At the same time, the company envisions a broader commercial rollout for the general public, positioning AlterEgo as a hands-free alternative to smart speakers, virtual assistants, and other connected devices.

Experts, however, are cautious. Howard Chizeck, an electrical and computer engineer at the University of Washington, said the concept appears technically feasible and even poses fewer privacy risks than always-listening devices such as Amazon’s Alexa. Yet he remains skeptical about whether the technology will gain widespread adoption outside of specialized medical use.

The launch of AlterEgo highlights both the potential and the uncertainties of human-technology integration. While it could redefine accessibility and digital communication for millions, its commercial future will depend on consumer acceptance and the balance between convenience, privacy, and practicality.