You asked about Monitoring
17 people built something like it. 5 are gone.
That is 29% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2023-10-02 | openstatus.dev | still up |
| 2022-03-15 | zipy.ai | still up |
| 2022-07-31 | devraven.io | gone |
| 2022-06-23 | nerdcrawler.com | unverified |
| 2023-06-26 | kadeck.com | still up |
| 2021-06-14 | monika.hyperjump.tech | still up |
| 2022-02-24 | kordon.io | still up |
| 2023-06-13 | brotandgames.com | still up |
| 2023-05-10 | wolfia.com | still up |
| 2021-05-21 | odown.io | moved |
| 2023-08-09 | hawkflow.ai | unverified |
| 2023-03-09 | swishjam.com | moved |
| 2021-08-08 | beta.rocketcompute.com | gone |
| 2021-07-27 | bitcoind.observer | gone |
| 2023-09-05 | kshivendu.dev | still up |
| 2022-06-20 | tunnelhub.io | still up |
| 2023-09-06 | watchmyssl.com | unverified |
| 2021-07-15 | checkify.io | unverified |
| 2026-09-06 | openmonitor.website | unverified |
| 2023-05-17 | printnanny.ai | gone |
| 2023-12-13 | pandapatrol.io | moved |
| 2022-04-28 | leafnode.nl | still up |
| 2023-06-15 | priceincheck.com | gone |
| 2023-11-08 | uptimefunk.com | still up |
| 2022-07-21 | cast.ai | 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.