You asked about Climate
31 people built something like it. 3 are gone.
That is 10% 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 |
| 2022-06-17 | climatechangetracker.org | 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 | Software to find the best sites for renewables on the electrical grid · niraenergy.com | still up |
| 2022-01-01 | Underwater robotic vehicles that collect battery metals responsibly · impossiblemetals.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 |
| 2022-06-01 | We recycle plastic using engineered enzymes · birchbiosciences.com | still up |
| 2022-06-01 | YCALT TEX Biodegradable and carbon neutral textiles, engineered from food waste. · thealttex.com | still up |
| 2022-01-01 | Next-generation, modular electric vehicles · olympianmotors.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 |
| 2022-01-01 | 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 |
| 2022-01-01 | Making 'REAL' Cow and Human Milk! · unrealmilk.com | still up |
| 2022-06-01 | YCVoltic Electric cargo ships · volticshipping.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
Y Combinator reports its own outcomes, including acquisitions. The other two are judged by asking the domain, so they are not measured the same way and are never averaged together.
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.