You asked about Climate
12 people built something like it. 3 are gone.
That is 25% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2023-01-01 | YCRUUF Managed marketplace for solar in Latam · ruuf.cl | still up |
| 2023-06-01 | YCHyLight Unmanned airships for inspecting our critical assets · hylight.aero | still up |
| 2023-01-01 | YCBluedot Bluedot is a single payment platform for EV drivers and fleets. · thebluedot.co | still up |
| 2023-06-01 | YCGuac AI-powered forecasting & replenishment for grocery · guac.com | still up |
| 2023-01-01 | YCCoperniq Workflow software for solar & energy contractors ☀️😎 · coperniq.io | still up |
| 2023-06-01 | Tracking methane emissions with satellites · orbio.earth | still up |
| 2023-01-01 | Emission free hydrogen electric aircraft · stralis.aero | still up |
| 2023-06-01 | Incentives and financing for energy efficiency upgrades · line.build | gone |
| 2023-01-01 | Revolutionary, Modern Wing Sails · outsailtech.com | gone |
| 2023-06-01 | Genetically engineering plants for disease resistance. · ohmicbiosciences.com | still up |
| 2023-01-01 | YCAtmeto We develop ML that optimizes how batteries in the grid store energy · atmeto.com | still up |
| 2023-01-01 | YCChoppy! FAST FLAVORFUL PROTEIN · eatchoppy.com | 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.