You asked about Hardware
13 people built something like it. 1 is gone.
That is 8% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | Robots for longer-lasting, better-tasting fish at scale. · shinkei.systems | still up |
| 2022-01-01 | Plug-and-play AI platform with sensors and dashboards that makes… · iotflows.com | still up |
| 2022-01-01 | Bluetooth to Space · hubble.com | still up |
| 2022-01-01 | Making all ships robots. · fleetzero.com | still up |
| 2022-01-01 | Multicolor lasers for ultrafast data transmission · enlightra.com | still up |
| 2022-01-01 | YCUNISON Live between worlds, in UNISON, using the headset we're building! · in-unison.com | still up |
| 2022-01-01 | YCCofactr Cloud pre-factory logistics and procurement for electronics · cofactr.com | still up |
| 2022-01-01 | We go all out to Build the Smartest AI-Enabled Cameras! · avairsense.com | gone |
| 2022-01-01 | YCAirMyne Building systems to remove carbon dioxide from air at industrial scale · airmyne.com | still up |
| 2022-01-01 | Detect cyber attacks on critical physical infrastructure · palitronica.com | still up |
| 2022-06-01 | YCVelontra Hypersonic space plane that can take-off from any location and weather · velontra.com | still up |
| 2022-01-01 | YCNearWave Helping physicians select the right therapy for breast cancer patients · nearwave.co | still up |
| 2022-06-01 | Faster processors for solving NP-complete problems · integrated-reasoning.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.