You asked about AR
22 people built something like it. 4 are gone.
That is 18% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2021-09-22 | motion.dev | still up |
| 2021-06-01 | auxl.io | still up |
| 2022-07-15 | eesel.app | still up |
| 2023-09-25 | crystaldoc.info | still up |
| 2023-03-08 | searq.org | gone |
| 2023-03-01 | summarize.tech | unverified |
| 2022-09-12 | libninja.com | still up |
| 2021-09-20 | oikolab.com | still up |
| 2021-05-23 | glitterly.app | unverified |
| 2022-02-09 | goperigon.com | moved |
| 2023-02-07 | oneapikey.com | gone |
| 2021-10-20 | swell.is | still up |
| 2023-05-31 | brave.com | still up |
| 2026-08-25 | keenable.ai | unverified |
| 2023-08-30 | pyas.io | still up |
| 2022-07-01 | taddy.org | still up |
| 2023-10-12 | markdowndb.com | still up |
| 2022-07-28 | sabil.io | still up |
| 2022-03-16 | plaraphy.com | gone |
| 2023-09-13 | docs.switchboard.audio | still up |
| 2023-11-14 | alignapi.com | still up |
| 2022-01-23 | databar.ai | still up |
| 2026-08-19 | marginalhq.com | unverified |
| 2021-09-14 | mixpeek.com | still up |
| 2023-08-08 | litellm.ai | still up |
| 2023-05-04 | llm.report | unverified |
| 2022-10-05 | mesh.martify.io | gone |
| 2021-01-25 | newscatcherapi.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.