You asked about Climate
34 people built something like it. 10 are gone.
That is 32% 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 | YCRemora Carbon capture for vehicles · remoracarbon.com | still up |
| 2021-01-01 | Juicy marbles makes thick juicy and marbled plant based steaks. · juicymarbles.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 |
| 2021-06-02 | changeit.app | 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 |
| 2021-06-01 | YCEnerjazz Making electric vehicle batteries affordable · enerjazz.tech | still up |
| 2021-01-01 | Healthy organic food that creates a positive impact · swadesiway.com | still up |
| 2021-11-10 | itsgettingtoowarm.com | 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 | Technologies for scaling up cultured/clean meat production · micromeat.com | gone |
| 2021-06-01 | YCCanopi API to measure and eliminate carbon emissions · canopi.cash | gone |
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.