You asked about Carbon Capture and Removal
38 people built something like it. 0 are gone.
That is 0% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2017-06-01 | Turning food waste into Biochar to remove CO2 from the atmsophere · releaf.africa | still up |
| 2020-01-01 | YCSINAI Enterprise software to quantify cost-effective decarbonization… · sinai.com | still up |
| 2021-06-01 | YCAbatable Carbon markets platform and solutions · abatable.com | still up |
| 2022-01-01 | We make carbon negative roads · carboncrusher.io | still up |
| 2015-01-01 | We design and build microbes to make chemicals greener at lower cost. · imicrobes.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 | YCALT TEX Biodegradable and carbon neutral textiles, engineered from food waste. · thealttex.com | still up |
| 2021-06-01 | YCPhykos Growing seaweed to stabilize the climate. · phykos.co | still up |
| 2021-01-01 | YCRemora Carbon capture for vehicles · remoracarbon.com | still up |
| 2022-01-01 | YCSeabound Carbon capture equipment for ships · seabound.co | still up |
| 2022-03-16 | hints.so | still up |
| 2022-07-15 | notionsecondbrain.com | still up |
| 2023-05-24 | pixian.ai | still up |
| 2021-12-29 | a9.io | still up |
| 2017-01-01 | YCSolugen Decarbonizing the chemicals industry. · solugen.com | still up |
| 2022-02-02 | climatiq.io | still up |
| 2021-03-14 | critter.camera | still up |
| 2022-02-22 | volograms.com | still up |
| 2022-01-06 | plask.ai | still up |
| 2022-05-11 | carbonfact.com | still up |
| 2016-06-01 | YCValidere A carbon MRV solution for energy and hard-to-abate sectors · validere.com | still up |
| 2022-11-10 | docs.cdrplatform.com | still up |
| 2022-01-01 | Enterprise software for companies to track & reduce their carbon… · unravelcarbon.com | still up |
| 2020-01-01 | maximizing biomass on low quality land · livingcarbon.com | still up |
| 2018-06-01 | Next-gen ingredients to decarbonize consumer products, starting w/… · c16bio.com | still up |
| 2019-01-01 | We use solar and wind power to make zero net carbon electrofuels · prometheusfuels.com | still up |
| 2021-06-01 | Decarbonizing the fashion industry · carbonfact.com | still up |
| 2017-06-01 | YCAirthium Decarbonized heat and power cheaper than fossil fuels · airthium.com | still up |
| 2020-06-01 | We help companies automate the accounting of their carbon emissions · carbonchain.com | still up |
| 2019-06-01 | YCWren Wren is a monthly subscription to offset your carbon footprint. · wren.co | still up |
| 2022-01-01 | We make carbon negative chemicals from CO2 using fermentation · phasebiolabs.com | still up |
| 2022-05-17 | lookback.life | still up |
| 2024-06-01 | Vanta for carbon compliance · useoffstream.com | still up |
| 2023-01-01 | Phone AI that Captures Every Dealership Revenue Opportunity · shortloop.dev | still up |
| 2023-01-28 | unpwnable.netlify.app | still up |
| 2021-05-29 | fiberstand.com | still up |
| 2024-06-01 | Transform Images And Videos Into Immersive 3D With AI · digitalcarbon.ai | still up |
| 2022-06-01 | YCKnowtex Making doctors 2x more efficient with AI note-taking & charge capture · knowtex.ai | 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.