You asked about Alternative Battery Tech
43 people built something like it. 9 are gone.
That is 21% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-04 | read.cv | unverified |
| 2021-04-20 | cusdis.com | still up |
| 2021-07-06 | sidequestjobs.com | unverified |
| 2021-09-10 | medusa-commerce.com | gone |
| 2021-03-29 | coollabs.io | still up |
| 2021-01-07 | synergyjs.org | gone~54mo |
| 2021-07-20 | sioyek.info | still up |
| 2021-03-16 | sellff.com | still up |
| 2021-11-15 | textframe.app | still up |
| 2021-03-05 | relocate.me | still up |
| 2021-01-12 | vantage.sh | still up |
| 2021-02-03 | ytt-tech.com | unverified |
| 2021-04-03 | bilbof.com | still up |
| 2021-09-09 | appliku.com | still up |
| 2021-03-24 | arc.tripl.ai | still up |
| 2021-08-17 | tara.ai | still up |
| 2021-03-21 | papercups.io | unverified |
| 2021-01-07 | leetresumes.com | unverified |
| 2021-06-28 | get21stnight.com | still up |
| 2021-01-15 | forgojs.org | still up |
| 2021-06-29 | blog.framelabs.eu | unverified |
| 2021-10-27 | stack55.com | still up |
| 2021-10-11 | hellocaribou.com | gone |
| 2021-02-06 | demo.hushdocs.com | still up |
| 2021-08-17 | uselemon.io | still up |
| 2021-07-03 | fosscord.com | unverified |
| 2021-09-22 | getvero.com | still up |
| 2021-01-18 | appstitch.dev | still up |
| 2021-04-06 | noat.cards | gone |
| 2021-09-14 | hackerpen.io | gone |
| 2021-08-16 | imba.io | still up |
| 2021-03-28 | recorank.com | unverified |
| 2021-06-15 | tilodb.com | gone |
| 2021-10-07 | fifthtry.com | gone |
| 2021-03-13 | reallyconfused.co | still up |
| 2021-10-20 | swell.is | still up |
| 2021-09-26 | jobsinhealthtech.com | gone |
| 2021-03-26 | serendipital.com | still up |
| 2021-10-13 | firstpartyhq.com | still up |
| 2021-02-26 | zepel.io | still up |
| 2021-08-15 | heahy.com | still up |
| 2021-08-10 | tally.so | still up |
| 2021-08-25 | webden.dev | still up |
| 2021-11-19 | getzero.dev | moved |
| 2021-03-28 | remotebear.io | still up |
| 2021-04-09 | exchangerate.host | still up |
| 2021-01-01 | englog.io | gone~27mo |
| 2021-03-07 | hockeystack.com | still up |
| 2021-01-29 | awingu.com | moved |
| 2021-03-26 | blocksurvey.io | still up |
| 2021-05-13 | blog.nezaboodka.com | still up |
| 2021-03-12 | zenkit.com | still up |
| 2021-04-08 | f-droid.org | 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.