Haven't heard of this company before. A good synopsis I dug up in their fundraising announcement:

> JetZero, co-founded in 2020 by start-up veteran Tom O’Leary and aerospace legend Mark Page, is developing the world’s first commercial all-wing airplane. With up to 50% better fuel efficiency and lower carbon emissions compared to existing commercial airliners, JetZero's Z4 will offer the aviation industry a clear path to achieving its 2050 net-zero goals while also elevating the passenger experience. Working alongside the US Air Force, NASA, and the FAA, and backed by decades of investment and research into blended wing technology. JetZero looks to enter commercial service in the early 2030s.

Where an "all-wing" airplane is, kudos to Gemini,

> one that merges the main body and wings into a single lifting surface. This can reduce drag, lower fuel burn, and expand interior space.