You asked about Machine Learning
20 people built something like it. 4 are gone.
That is 20% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2021-04-10 | removebackground.app | still up |
| 2021-09-24 | magicsheets.io | moved |
| 2021-06-28 | sample.findka.com | unverified |
| 2021-01-31 | hacker-ai.com | gone~60mo |
| 2021-07-23 | backgroundremover.app | moved |
| 2021-08-03 | datarevenue.com | unverified |
| 2021-03-24 | palletml.com | still up |
| 2021-04-02 | backprop.co | unverified |
| 2021-01-30 | nn.labml.ai | still up |
| 2021-02-06 | libretranslate.com | still up |
| 2021-03-17 | gpu.land | moved |
| 2021-07-19 | primerlabs.io | unverified |
| 2021-09-04 | vim.is | still up |
| 2021-05-08 | tiny.school | unverified |
| 2021-01-06 | buschermoehle.org | still up |
| 2021-04-09 | deprocrastination.co | unverified |
| 2021-01-07 | deckmill.com | still up |
| 2021-11-15 | cppbyexample.com | still up |
| 2021-03-13 | reallyconfused.co | still up |
| 2021-09-23 | remnote.com | still up |
| 2021-09-07 | arthurdouillard.com | still up |
| 2021-12-01 | evm.codes | still up |
| 2021-04-14 | storagetarget.com | still up |
| 2021-03-02 | blog.repl.it | gone~8mo |
| 2021-11-02 | officeroutine.com | gone |
| 2021-06-18 | hotpotenglish.com | unverified |
| 2021-02-28 | learnobit-36a54.firebaseapp.com | still up |
| 2021-01-13 | remnote.io | moved |
| 2021-05-29 | learn.circuitverse.org | still up |
| 2021-10-05 | odysseyapp.co.nz | gone |
| 2021-11-04 | lazywords.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.