You asked about Air Taxis
25 people built something like it. 25 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2019-01-01 | The Rocket Network: Sustainable & On-Demand Delivery Anywhere in Space · spaceryde.com | gone |
| 2014-06-01 | YCFlytenow Ride sharing for small planes · flytenow.com | gone |
| 2013-01-01 | YCAirware Airware provides end-to-end solutions that enable enterprises to… · airware.com | gone |
| 2013-01-01 | FlightCar is the Airbnb of Car Rentals at Airports.
We allow people… · flightcar.com | gone |
| 2022-01-01 | We go all out to Build the Smartest AI-Enabled Cameras! · avairsense.com | gone |
| 2021-06-01 | YCHeimdal Affordable and verified direct air carbon capture and storage · heimdalccu.com | gone |
| 2012-06-01 | YCGetGoing We are building a "transparent opaque" airfare and hotel booking site… · getgoing.com | gone |
| 2015-01-01 | YCThinAir Intelligent data security for teams · thinair.com | gone |
| 2019-06-01 | YCNonu We deliver hair loss medicines for Indian men on a subscription basis. · nonucare.com | gone |
| 2019-06-01 | YCBlair Financing education through Income Share Agreements · joinblair.com | gone |
| 2021-01-01 | YCNoya Radically reducing capital costs and build time for direct air capture · noya.co | gone |
| 2022-06-01 | No-code data curation for LLM fine-tuning and evaluation. · airtrain.ai | gone |
| 2016-06-01 | Premium immersive cinematic VR entertainment for captive audiences · skylights.aero | gone |
| 2018-06-01 | YCdNovo The cure for hair loss. · dnovobio.com | gone |
| 2022-06-01 | YCDialect AI copilot for forms, questionnaires & RFX · usedialect.com | gone |
| 2017-01-01 | YCCowlar Fitbit for dairy cows. Farms use cowlar's alerts & recommendations to… · cowlar.com | gone |
| 2017-01-01 | YCTress Tress is a social community for black women's hairstyles. We are… · tressapp.co | gone |
| 2016-06-01 | Airo is an AI wearable to track mental health. · airohealth.com | gone |
| 2014-01-01 | YCAirPair Instant access to the world's best software experts via video chat… · airpair.com | gone |
| 2019-01-01 | Disney meets Airbnb Experiences · adventurous.co | gone |
| 2017-06-01 | Passerine Aircraft is building the next generation of dronesWe are… · passerineaircraft.com | gone |
| 2015-06-01 | YCAirmada Autonomous ground stations for drones · airmada.com | gone |
| 2007-06-01 | hellochair.com | gone |
| 2018-06-01 | dairy reinvented from plants · sperofoods.co | gone |
| 2012-06-01 | TBD · getcycle.com | gone |
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.