Oskar Painter, Amazon’s head of quantum hardware, criticized Microsoft CEO Satya Nadella ‘s statements as exaggerated. Painter expressed more favorable opinions on quantum efforts by Alphabet Inc.'s Google and IBM.

Several physicists say the lack of a peer-reviewed, detailed paper on Microsoft's work undermines its claims. The tech community is also skeptical.

Researchers have criticised Microsoft's new Majorana 1 quantum computer, saying it has made claims about the way it works that aren't fully backed up by scientific evidence