You asked about Alternative Battery Tech
27 people built something like it. 27 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2021-09-10 | medusa-commerce.com | gone |
| 2021-01-07 | synergyjs.org | gone~54mo |
| 2023-03-06 | sorbay.io | gone |
| 2023-07-02 | bigcapital.ly | gone |
| 2022-06-26 | crproxy.com | gone |
| 2022-04-28 | gaclient.com | gone |
| 2023-06-08 | 10xjobs.net | gone |
| 2021-10-11 | hellocaribou.com | gone |
| 2021-04-06 | noat.cards | gone |
| 2021-09-14 | hackerpen.io | gone |
| 2023-07-19 | chat.nbox.ai | gone |
| 2022-06-21 | scenario.tech | gone |
| 2022-10-30 | skipbigtech.com | gone |
| 2021-06-15 | tilodb.com | gone |
| 2021-10-07 | fifthtry.com | gone |
| 2022-12-30 | fetcher.page | gone |
| 2022-12-16 | sendie.com | gone |
| 2022-05-13 | sodha.dev | gone |
| 2021-09-26 | jobsinhealthtech.com | gone |
| 2023-01-21 | houseofsupr.com | gone |
| 2022-08-10 | layoffbase.com | gone |
| 2023-05-01 | poeticmetric.com | gone |
| 2023-11-03 | minimanuals.com | gone |
| 2021-01-01 | englog.io | gone~27mo |
| 2023-05-24 | muny.im | gone |
| 2023-03-30 | atomix.design | gone |
| 2023-08-03 | modelfusion.dev | 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.