You asked about Airplanes
12 people built something like it. 0 are gone.
That is 0% of the ones whose fate we could settle, against 23% across the whole register. 1 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | First electric business aircraft designed for hydrogen propulsion · beyond-aero.com | still up |
| 2017-06-01 | YCPyka Autonomous electric airplanes · flypyka.com | still up |
| 2021-01-01 | The lightest electric aircraft motors in the world. · h3x.tech | still up |
| 2018-06-01 | YCDuffel The complete toolkit to sell travel. · duffel.com | still up |
| 2019-01-01 | Heart makes electric airplanes with an all-electric range of 250 miles · heartaerospace.com | still up |
| 2020-01-01 | Long range, battery electric vertical take-off and landing aircraft. · talyn.com | acquired |
| 2021-06-01 | Vertical takeoff and landing aircraft for major airlines · odysaviation.com | still up |
| 2022-06-01 | Airplanes anyone can fly · airhartaero.com | still up |
| 2019-01-01 | Flying motorcycles · jetpackaviation.com | still up |
| 2017-01-01 | Boeing for electric planes · weflywright.com | still up |
| 2022-06-01 | We make the world's most efficient aircraft · seaflight.tech | still up |
| 2023-01-01 | Emission free hydrogen electric aircraft · stralis.aero | still up |
How this compares
The register re-probes every domain it holds. Some that answered last month stop answering. We send that list — what went quiet, and what it was — once a month. Nothing else.
How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.