You asked about Hard Tech
331 people built something like it. 39 are gone.
That is 13% of the ones whose fate we could settle, against 23% across the whole register. 20 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2022-01-01 | Robots for longer-lasting, better-tasting fish at scale. · shinkei.systems | still up |
| 2022-01-01 | Bluetooth to Space · hubble.com | still up |
| 2022-01-01 | Making all ships robots. · fleetzero.com | still up |
| 2022-01-01 | YCWyvern High-res hyperspectral pictures of Earth from space · wyvern.space | still up |
| 2022-06-01 | General Autonomy for Industrial Vehicles · polymathrobotics.com | still up |
| 2022-01-01 | Multicolor lasers for ultrafast data transmission · enlightra.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 | YCAirMyne Building systems to remove carbon dioxide from air at industrial scale · airmyne.com | still up |
| 2022-01-01 | We Mine Asteroids · astroforge.io | still up |
| 2022-01-01 | IndustrialNext builds the AI brain for manufacturing –… · industrialnext.ai | still up |
| 2022-01-01 | Detect cyber attacks on critical physical infrastructure · palitronica.com | still up |
| 2022-01-01 | Empowering Mass Spec for Biotech and Beyond · andsonbiotech.com | still up |
| 2022-01-01 | YCNearWave Helping physicians select the right therapy for breast cancer patients · nearwave.co | still up |
| 2022-06-01 | Faster processors for solving NP-complete problems · integrated-reasoning.com | still up |
| 2022-11-23 | bugasura.io | still up |
| 2022-01-01 | Data driven neobank for SMBs in LATAM · kapital.mx | still up |
| 2022-05-11 | himalayas.app | still up |
| 2022-11-23 | luckycarrotapp.com | still up |
| 2022-01-01 | B2B E-commerce & Fintech platform for Pharmacies & Hospitals in Africa · remedial.health | still up |
| 2022-01-01 | Food delivery service in Africa · beudelivery.com | still up |
| 2022-06-20 | insquad.com | still up |
| 2022-06-02 | quaxio.com | still up |
| 2022-03-01 | techtotherescue.org | still up |
| 2022-02-01 | tech-blogs.dev | still up |
| 2022-01-01 | insurednomads.com | unverified |
| 2022-10-05 | hito.xyz | unverified |
| 2022-05-06 | layoffs.fyi | still up |
| 2022-04-08 | candidatechecker.io | still up |
| 2022-06-13 | unicorn.dev | unverified |
| 2022-01-26 | joincandor.com | still up |
| 2022-06-08 | skipp.dev | still up |
| 2022-03-09 | techstandswithukraine.io | gone |
| 2022-01-01 | YCRemi Simplifying roofing for homeowners, roofers and enterprises. · remihq.com | still up |
| 2022-10-06 | nocode.tech | still up |
| 2022-05-23 | flash.vasanthv.com | gone |
| 2022-03-30 | report.yerbo.co | unverified |
| 2022-05-14 | ctofieldguide.com | still up |
| 2022-02-09 | creatorclub.com | gone |
| 2022-06-24 | windowesg.com | still up |
| 2022-03-02 | hardcover.app | unverified |
| 2022-01-01 | YCGoJom One-stop-shop for Real Estate Solutions. · gojom.com | still up |
| 2022-04-11 | phasmadesign.com | moved |
| 2022-10-20 | jointaro.com | still up |
| 2022-05-30 | alltoplinks.com | still up |
| 2022-06-02 | stateofdb.com | still up |
| 2022-01-01 | Indonesia's #1 ATS & Job Portal to match top talents & companies · dealls.com | still up |
| 2022-01-10 | neuman.so | still up |
| 2022-06-03 | okrstudio.com | still up |
| 2022-03-25 | flagright.com | still up |
| 2022-01-01 | YCNumida Working capital for African micro businesses · numida.com | still up |
| 2022-02-09 | interviewing.io | still up |
| 2022-01-27 | riku.ai | still up |
| 2022-04-27 | heykona.com | moved |
| 2022-06-09 | rpo.indigohire.com | unverified |
| 2022-01-07 | pomotimer.com | still up |
| 2022-10-14 | sqlfordevs.com | still up |
| 2022-05-27 | oura.gucci.com | gone |
| 2022-06-07 | tryexponent.com | still up |
| 2022-01-01 | Smart Cold Chain Fulfillment Platform · freshfactory.id | 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.