You asked about Hard Tech
288 people built something like it. 42 are gone.
That is 16% of the ones whose fate we could settle, against 23% across the whole register. 26 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | Software orchestrated mass production of plastics · atomic.industries | still up |
| 2021-01-01 | Physical AI for Warehouses and Factories · fluxauto.ai | still up |
| 2021-01-01 | YCAlbedo Full-stack VLEO satellite missions · albedo.com | still up |
| 2021-06-01 | YCLuminate We make cancer care at home possible. · luminatemed.com | still up |
| 2021-01-01 | YCRemora Carbon capture for vehicles · remoracarbon.com | still up |
| 2021-06-01 | YCVedaBio CRISPR powered Diagnostics with results in minutes. · vedabio.com | still up |
| 2021-06-01 | Turning space into a transportation layer for Earth · inversionspace.com | still up |
| 2021-06-01 | Automated e2e screenshot testing without writing or maintaining tests · meticulous.ai | still up |
| 2021-06-01 | Vertical takeoff and landing aircraft for major airlines · odysaviation.com | still up |
| 2021-01-01 | We make satellites to image everywhere on Earth, every 15 minutes · albaorbital.com | still up |
| 2021-01-01 | Desktop DNA Printer. The Nespresso Machine for DNA. · kilobaser.com | still up |
| 2021-06-01 | Portable cryoablation to prevent cervical cancer · ananya.health | still up |
| 2021-06-01 | YCPotion AI for product formulation · potion.ai | still up |
| 2021-06-01 | Programmable biology company for psychoactive effect design · mindstate.design | still up |
| 2021-06-01 | YCJupe Just add land · jupe.com | gone |
| 2021-01-01 | Autonomous street sweeping as a service by retro-fitting vehicles · hermes-robotics.com | still up |
| 2021-06-01 | A platform to make artificial viruses as cancer therapeutics. · humanegenomics.com | still up |
| 2021-01-01 | Building robots to automate commercial concrete construction. · rointech.com | acquired |
| 2021-01-01 | YCAuricle Neurostimulation implant to restore hearing & speech understanding · auricle.com | still up |
| 2021-01-01 | The highest-accuracy global weather data from low-cost flat satellites · careweather.com | still up |
| 2021-01-01 | YCGreywing The Operating System for Maritime · grey-wing.com | still up |
| 2021-06-01 | Technologies for scaling up cultured/clean meat production · micromeat.com | gone |
| 2021-01-01 | Redcliffe Labs is India's Largest Omni-channel Diagnostics platform · redcliffelabs.com | still up |
| 2021-06-01 | YCLemFi Fair, simple and accessible financial services · lemfi.com | still up |
| 2021-01-01 | YCHoum All-in-one real estate marketplace for Latin America · houm.com | still up |
| 2021-01-01 | Mobile Energy Storage Technology · moxionpower.com | gone |
| 2021-01-01 | YCDjamo Challenger Bank for consumers in French speaking Africa. · djamo.com | still up |
| 2021-06-01 | Global platform for employee engagement with rewards&flexible benefits · advantageclub.co | still up |
| 2021-06-01 | YCOnebrief Onebrief makes military headquarters run seamlessly · onebrief.com | still up |
| 2021-06-01 | IP operating software for brands and content companies · marqvision.com | still up |
| 2021-01-01 | YCOntop Simplifying hiring and payments for the global workforce · getontop.com | still up |
| 2021-01-01 | YCclicOH Amazon-like logistics for e-commerce companies in Latam · clicoh.com | still up |
| 2021-06-01 | YCBaubap Smart micro financing for everyone · baubap.com | still up |
| 2021-01-01 | YCGigs The OS for Embedded Telecom · gigs.com | still up |
| 2021-06-01 | YCToku Account Receivables Platform for Latin American Enterprises · trytoku.com | still up |
| 2021-06-01 | Corporate Card solution for Indian businesses · karboncard.com | still up |
| 2021-01-01 | We help US tech companies hire and manage software engineers in LATAM · howdy.com | still up |
| 2021-01-01 | YCGridware Protecting the grid today, preparing the grid for tomorrow · gridware.io | still up |
| 2021-01-01 | YCPibit.ai The fastest path from submission to better decisions. · pibit.ai | still up |
| 2021-01-01 | YCCamber Admin automation for healthcare · camber.health | still up |
| 2021-01-01 | YCR2 Embedded lending infrastructure · r2.co | acquired |
| 2021-06-01 | YCARQ The global financial platform for affluent consumers in the Americas. · arqfinance.com | still up |
| 2021-01-01 | YCGroMo App for independent agents to sell financial products in India · gromo.in | still up |
| 2021-01-01 | YCCodingal Leading online after-school for kids & teens to learn AI & coding · codingal.com | still up |
| 2021-06-01 | Learning platform for job seekers with job applications automation · careerist.cc | still up |
| 2021-06-01 | YCChari B2B e-commerce and fintech platform for traditional proximity stores · chari.com | still up |
| 2021-01-01 | YCDarrow Bring Justice to Light · darrow.ai | still up |
| 2021-01-01 | Aviron transforms workouts with game-based exercise machines, making… · avironactive.com | still up |
| 2021-01-01 | YCpeopleCQ Employer backed payroll advances for employees in Egypt · peoplecq.com | still up |
| 2021-01-01 | YCZ1 Digital bank for teenagers in LatAm connected to prepaid card · z1.app | still up |
| 2021-06-01 | YCStownest Flexible On-Demand Storage Space for Household, SMEs & Travellers. · stownest.com | still up |
| 2021-01-01 | The new wealth manager for Europe · finary.com | still up |
| 2021-01-01 | YCAtrato Enabling consumers split the cost of purchases without a credit card · atratopago.com | still up |
| 2021-06-01 | We make instant offers to buy homes in India · ivy.homes | still up |
| 2021-06-01 | YCDouble We make software for bookkeepers. · doublehq.com | still up |
| 2021-01-01 | YCMeru.com The one-stop-shop for auto-parts in Mexico. · meru.com | still up |
| 2021-06-01 | YCSlash Banking, corporate cards, stablecoin payments – available globally. · slash.com | still up |
| 2021-01-01 | YCProspa Banking for businesses · getprospa.com | still up |
| 2021-06-01 | YCNomod The UAE’s leading small business payments platform · nomod.com | still up |
| 2021-06-01 | YCForage Payments powering people · joinforage.com | still up |
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.