You asked about Carbon Capture and Removal
9 people built something like it. 2 are gone.
That is 22% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2023-05-24 | pixian.ai | still up |
| 2021-12-29 | a9.io | still up |
| 2021-03-14 | critter.camera | still up |
| 2021-01-31 | sr.ht | gone |
| 2022-11-10 | docs.cdrplatform.com | still up |
| 2022-05-23 | milkvideo.com | unverified |
| 2022-03-02 | beta.backspace.eco | gone |
| 2021-10-01 | peppersf.com | moved |
| 2021-07-14 | avrio.com | moved |
| 2021-07-01 | litenote.cc | unverified |
| 2022-05-17 | lookback.life | still up |
| 2021-12-16 | tella.tv | moved |
| 2023-01-28 | unpwnable.netlify.app | still up |
| 2021-05-29 | fiberstand.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.