You asked about Air Taxis
14 people built something like it. 3 are gone.
That is 21% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | First electric business aircraft designed for hydrogen propulsion · beyond-aero.com | still up |
| 2022-01-01 | Faire for Indonesia · credibook.com | still up |
| 2022-01-01 | YCAxis Knowledge base for corporate affairs teams · axis.xyz | still up |
| 2022-01-01 | Airtable for 400 Million SMBs Globally · play.google.com | still up |
| 2022-01-01 | We go all out to Build the Smartest AI-Enabled Cameras! · avairsense.com | gone |
| 2022-06-01 | B2B SaaS for insurance damage repair contractors. · albiware.com | still up |
| 2022-01-01 | YCAirMyne Building systems to remove carbon dioxide from air at industrial scale · airmyne.com | still up |
| 2022-06-01 | Airplanes anyone can fly · airhartaero.com | still up |
| 2022-06-01 | AI workforce for mortgage · flairlabs.ai | still up |
| 2022-06-01 | No-code data curation for LLM fine-tuning and evaluation. · airtrain.ai | gone |
| 2022-01-01 | YCAirwork On-demand labour that's actually good · airworkhq.com | still up |
| 2022-06-01 | We make the world's most efficient aircraft · seaflight.tech | still up |
| 2022-06-01 | YCDialect AI copilot for forms, questionnaires & RFX · usedialect.com | gone |
| 2022-01-01 | Find a home you can actually afford · stairsfinancial.com | 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.