You asked about Climate
32 people built something like it. 10 are gone.
That is 34% of the ones whose fate we could settle, against 23% across the whole register. 3 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | Mobile Energy Storage Technology · moxionpower.com | gone |
| 2021-01-01 | YCGridware Protecting the grid today, preparing the grid for tomorrow · gridware.io | still up |
| 2021-01-01 | YCEnode Energy Orchestration Platform · enode.com | still up |
| 2021-06-01 | Home electrification at $0 upfront cost · solarmente.es | gone |
| 2021-01-01 | The lightest electric aircraft motors in the world. · h3x.tech | still up |
| 2021-01-01 | YCAlbedo Full-stack VLEO satellite missions · albedo.com | still up |
| 2021-01-01 | Juicy marbles makes thick juicy and marbled plant based steaks. · juicymarbles.com | still up |
| 2021-01-01 | YCRemora Carbon capture for vehicles · remoracarbon.com | still up |
| 2021-01-01 | The fastest and easiest way to make home upgrades · homebreeze.ai | gone |
| 2021-01-01 | YCREGENT All-electric seagliders for fast, affordable regional transportation · regentcraft.com | still up |
| 2021-06-01 | YCAbatable Carbon markets platform and solutions · abatable.com | still up |
| 2021-06-01 | YCPerfekto Grocery subscription service against food waste in Latam · perfekto.mx | gone |
| 2021-06-01 | Robots that build solar farms · chargerobotics.com | still up |
| 2021-06-01 | Decarbonizing the fashion industry · carbonfact.com | still up |
| 2021-06-01 | Water risk mitigation for industrial sites · waterplan.com | still up |
| 2021-06-01 | Low-cost, high-scale EV charging platform for apartments (and more). · heycharge.com | still up |
| 2021-06-01 | YCFerveret Nuclear-inspired cooling that turns wasted power into more AI compute · ferveret.com | still up |
| 2021-06-01 | YCHeimdal Affordable and verified direct air carbon capture and storage · heimdalccu.com | gone |
| 2021-06-01 | Vertical takeoff and landing aircraft for major airlines · odysaviation.com | still up |
| 2021-01-01 | Electricity price forecasts for energy storage, ev charging, etc. · inbalanceresearch.com | acquired |
| 2021-06-01 | Battery Observability Platform for Electric Vehicles · coulomb.ai | still up |
| 2021-01-01 | Healthy organic food that creates a positive impact · swadesiway.com | still up |
| 2021-06-01 | YCEnerjazz Making electric vehicle batteries affordable · enerjazz.tech | still up |
| 2021-01-01 | Tasty and scalable cultivated meat at price parity · orbillion.com | acquired |
| 2021-01-01 | YCNoya Radically reducing capital costs and build time for direct air capture · noya.co | gone |
| 2021-06-01 | YCJupe Just add land · jupe.com | gone |
| 2021-06-01 | Reducing energy costs & emissions in buildings. · kapacity.io | acquired |
| 2021-06-01 | Building the next generation food ingredient champion. · planet-a-foods.com | still up |
| 2021-06-01 | Revolutionizing digital selling within HVAC · onsitepro.co | gone |
| 2021-06-01 | YCPhykos Growing seaweed to stabilize the climate. · phykos.co | still up |
| 2021-06-01 | YCCanopi API to measure and eliminate carbon emissions · canopi.cash | gone |
| 2021-06-01 | Technologies for scaling up cultured/clean meat production · micromeat.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.