You asked about Climate
30 people built something like it. 3 are gone.
That is 11% of the ones whose fate we could settle, against 23% across the whole register. 2 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | YCRemi Simplifying roofing for homeowners, roofers and enterprises. · remihq.com | still up |
| 2022-06-01 | YCHedgehog Building robotic mushroom farms · hedgehogfoods.com | still up |
| 2022-06-01 | YCPaces Agentic AI for Power Projects and AI Infrastructure · paces.com | still up |
| 2022-01-01 | Enterprise software for companies to track & reduce their carbon… · unravelcarbon.com | still up |
| 2022-01-01 | Unlocking carbon markets for European forest owners · pina.earth | acquired |
| 2022-01-01 | YCWyvern High-res hyperspectral pictures of Earth from space · wyvern.space | still up |
| 2022-01-01 | Software to prevent downtime in a solar plant · smarthelio.com | still up |
| 2022-01-01 | We make carbon negative roads · carboncrusher.io | still up |
| 2022-01-01 | Underwater robotic vehicles that collect battery metals responsibly · impossiblemetals.com | still up |
| 2022-01-01 | Software to find the best sites for renewables on the electrical grid · niraenergy.com | still up |
| 2022-01-01 | YCSeabound Carbon capture equipment for ships · seabound.co | still up |
| 2022-01-01 | YCOffbeast We make plant-based steaks with an authentic texture · offbeast.com | still up |
| 2022-01-01 | YCAirMyne Building systems to remove carbon dioxide from air at industrial scale · airmyne.com | still up |
| 2022-01-01 | Next-generation, modular electric vehicles · olympianmotors.com | still up |
| 2022-06-01 | We recycle plastic using engineered enzymes · birchbiosciences.com | still up |
| 2022-01-01 | YCPosh Rapidly deployable energy solutions for modern commercial and… · poshenergy.com | still up |
| 2022-01-01 | We make carbon negative chemicals from CO2 using fermentation · phasebiolabs.com | still up |
| 2022-06-01 | YCALT TEX Biodegradable and carbon neutral textiles, engineered from food waste. · thealttex.com | still up |
| 2022-01-01 | We stop cows from burping methane. · alga.bio | still up |
| 2022-01-01 | Unlocking Virtual Power Plants for rental properties · glowenergy.com | acquired |
| 2022-01-01 | YCPelm Plaid for utilities · pelm.com | gone |
| 2022-06-01 | YCVoltic Electric cargo ships · volticshipping.com | still up |
| 2022-01-01 | Making 'REAL' Cow and Human Milk! · unrealmilk.com | still up |
| 2022-01-01 | Financing the next-generation of infrastructure projects · perlstreet.com | still up |
| 2022-06-01 | We make the world's most efficient aircraft · seaflight.tech | still up |
| 2022-01-01 | YCRevoy Make diesel semi trucks hybrid-electric · revoy.com | still up |
| 2022-06-01 | YCEvoly Smart electric & water meters as a service · evolyenergy.com | still up |
| 2022-01-01 | YCAklimate Software for enterprises to track and reduce supply chain emissions · getaklimate.com | gone |
| 2022-01-01 | First commodity marketplace for hydrogen. · phoenixhydrogen.com | gone |
| 2022-06-01 | We enable landlords to generate income from solar panels. · wandsolar.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.