Against the record
Zipline, from Zipline, is at stage 5 of 5 on our ladder: regulator-cleared or mass market. Cleared where approval applies, or widely sold. The latest milestone on its record is from 28 Oct 2026: Zipline said new flight software that adjusts speed and altitude to reduce noise was running across its whole fleet, cutting sound exposure per flight by 68% versus its 2025 fleet.
This video comes from the maker's own channel, and makers show their robots at their best. The stage above comes from dated public records, not from the video.
