You asked about Time Series
12 people built something like it. 4 are gone.
That is 33% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2021-09-07 | blog.spiceai.org | still up |
| 2023-10-25 | blog.spice.ai | unverified |
| 2021-03-02 | vectorly.io | moved |
| 2023-11-21 | mylens.ai | still up |
| 2023-09-09 | talebotai.com | gone |
| 2023-11-27 | drawfast.io | gone |
| 2022-11-29 | airy.co | still up |
| 2026-09-03 | aibriefs.news | unverified |
| 2023-04-11 | thellm.app | gone |
| 2026-09-03 | aietalks.com | unverified |
| 2023-09-27 | monkeemath.com | unverified |
| 2023-12-12 | hisanta.ai | moved |
| 2023-10-21 | storybooks.app | still up |
| 2026-08-18 | maritime.sh | unverified |
| 2023-11-09 | allcancode.com | still up |
| 2023-10-12 | blog.langchain.dev | moved |
| 2023-12-26 | timeevidence.com | still up |
| 2026-09-04 | airuncode.com | unverified |
| 2023-09-28 | diarupt.ai | gone |
| 2023-09-07 | fantasaur.com | still up |
| 2023-10-20 | hn-ai-newsletter.beehiiv.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.