You asked about Time Series
7 people built something like it. 1 is gone.
That is 14% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | YCvoize We build the AI companion for nurses, to create time for care. · voize.de | still up |
| 2022-06-01 | We're building satellites to create a real-time 3D map of the world. · arraylabs.io | still up |
| 2022-01-01 | Software to prevent downtime in a solar plant · smarthelio.com | still up |
| 2022-01-01 | YCShaped The real-time retrieval engine for search, feeds, and agents. · shaped.ai | still up |
| 2022-06-01 | Realtime Data Connectors · movinglake.com | still up |
| 2022-01-01 | YCTrellus Real-time sales coach for SDRs · trellus.ai | still up |
| 2022-06-01 | serverless platform for real-time data · denormalized.io | gone |
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.