You asked about Time Series
40 people built something like it. 17 are gone.
That is 43% 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 |
| 2021-11-08 | synchrocharts.com | still up |
| 2021-10-05 | questdb.io | moved |
| 2021-09-15 | replay.io | still up |
| 2021-07-06 | sidequestjobs.com | unverified |
| 2021-08-06 | papertime.app | gone |
| 2021-02-11 | docs.particubes.com | unverified |
| 2021-06-03 | quotes.vistimo.com | still up |
| 2021-05-25 | cascade.page | gone |
| 2021-10-20 | thehtime.com | still up |
| 2021-06-22 | pupishi.com | gone |
| 2021-11-27 | hyperchroma.app | still up |
| 2021-12-28 | masswerk.at | still up |
| 2021-08-03 | tomatotree.tv | gone |
| 2021-01-02 | compiledcssinjs.com | still up |
| 2021-01-29 | wsbsentiment.io | gone~10mo |
| 2021-05-09 | bits.monospace.live | still up |
| 2021-02-02 | incidents.sh | gone~34mo |
| 2021-03-09 | timetoherd.com | still up |
| 2021-10-13 | ttgpapp.com | gone |
| 2021-11-29 | background.webcam | gone |
| 2021-03-02 | vectorly.io | moved |
| 2021-06-30 | getkairo.com | still up |
| 2021-10-11 | spreadsheettimeline.com | gone |
| 2021-06-30 | quantale.io | unverified |
| 2021-11-05 | behemothengine.com | unverified |
| 2021-09-15 | puu.world | gone |
| 2021-03-28 | 1feed.app | moved |
| 2021-05-21 | odown.io | moved |
| 2021-06-17 | testflight.apple.com | still up |
| 2021-03-15 | storeoftime.com | still up |
| 2021-04-17 | daydreamer.app | unverified |
| 2021-09-02 | acreom.com | still up |
| 2021-09-04 | focus-time.app | still up |
| 2021-06-18 | time.lol | still up |
| 2021-09-08 | buildman.io | gone |
| 2021-03-02 | blog.repl.it | gone~8mo |
| 2021-02-21 | timelineify.com | gone~50mo |
| 2021-01-12 | mindfuldevmag.com | still up |
| 2021-07-15 | checkify.io | unverified |
| 2021-02-24 | lunatask.app | still up |
| 2021-12-12 | livepoll.dishy.dev | gone |
| 2021-03-06 | parents.surge.sh | unverified |
| 2021-07-25 | wanderthenight.com | still up |
| 2021-05-14 | onehumanrace.io | gone |
| 2021-09-01 | cloudalarm.in | gone |
| 2021-10-27 | kaizenflow.co | still up |
| 2021-06-24 | cee.studio | unverified |
| 2021-06-22 | getpause.com | still up |
| 2021-09-28 | docs.ditto.live | still up |
| 2021-04-12 | salatschedule.com | still up |
| 2021-07-20 | bopchat.com | unverified |
| 2021-04-24 | app.popsink.dev | gone |
| 2021-11-26 | bare.tw | unverified |
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.