You asked about Sleep Tech
257 people built something like it. 257 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2018-01-01 | YCTingles Find content that helps you relax and fall asleep. · gettingles.com | gone |
| 2015-01-01 | YCLully Lully is developing an under-the-mattress technology that precisely… · lullysleep.com | gone |
| 2019-01-01 | YCHypnos AI-powered sleep coach learns and optimizes your sleep · hypnos.ai | gone |
| 2015-01-01 | The digital sleep clinic · winkhealth.com | gone |
| 2019-01-01 | The everything store for restaurants in LATAM. · frubana.com | gone |
| 2021-01-01 | Mobile Energy Storage Technology · moxionpower.com | gone |
| 2018-06-01 | YCKobo360 Africa's leading supply chain technology platform. · kobo360.com | gone |
| 2012-01-01 | YCLendUp LendUp is a socially responsible company on a mission to redefine… · lendup.com | gone |
| 2018-01-01 | YCAtrium Modern law firm for startups powered by proprietary technology · atrium.co | gone |
| 2022-03-09 | techstandswithukraine.io | gone |
| 2022-05-23 | flash.vasanthv.com | gone |
| 2022-05-27 | oura.gucci.com | gone |
| 2022-04-17 | cebrum.tech | gone |
| 2022-01-01 | We make it easier for real estate to sell properties and mortgages. · vecindario.com | gone |
| 2016-01-01 | To make food a renewable resource, for everyone · inevitabletech.com | gone |
| 2016-01-01 | Tech enabled and fully integrated PAN India agri produce supply chain · kisannetwork.com | gone |
| 2022-01-01 | YCSeis Banking 100% in Spanish for the 44 million US Spanish speakers · seis.com | gone |
| 2021-06-01 | Home electrification at $0 upfront cost · solarmente.es | gone |
| 2020-01-01 | YCHelpNow India's most reliable Ambulance service. (uber for ambulances) · gethelpnow.in | gone |
| 2022-01-01 | YCCastia Built Rewards for Latam. Pay Rent and get benefits. · castia.com | gone |
| 2016-01-01 | YCCover The mobile-first insurance platform that makes insurance easy. · cover.com | gone |
| 2023-06-08 | 10xjobs.net | gone |
| 2019-06-01 | Autonomous homebuilding factory for the $1.7 trillion housing crisis. · rentthebackyard.com | gone |
| 2021-01-01 | The fastest and easiest way to make home upgrades · homebreeze.ai | gone |
| 2021-10-11 | hellocaribou.com | gone |
| 2021-01-01 | Plaid for Southeast Asia · finantier.co | gone |
| 2015-01-01 | YCPigeonly The affordable way to search, find & communicate with an incarcerated… · pigeonly.com | gone |
| 2021-06-01 | End-to-end commercial real estate transaction platform · propreturns.com | gone |
| 2022-01-01 | On demand provider of meat to households and food businesses · sendme.ng | gone |
| 2016-06-01 | YCSeerslab We are providing AR technologies and contents to app developers · argear.io | gone |
| 2021-06-01 | YCTAG TAG is the First Digital Bank (Chime/Revolut/N26) for Pakistan · tagme.pk | gone |
| 2021-01-01 | Buy and grow profitable e-commerce companies selling on Amazon and DTC · moonshotbrands.com | gone |
| 2017-01-01 | YCPulse Electronic Medical Records for India · getpulse.care | gone |
| 2023-01-01 | YCPeeba Risk-free wholesale for retailers across Southeast Asia · peeba.com | gone |
| 2020-06-01 | YCAtmos The entire homebuilding process, all online · buildatmos.com | gone |
| 2015-06-01 | ROSS is an AI-powered legal research platform that can read and… · rossintelligence.com | gone |
| 2018-01-01 | Engineering next-generation, brain-penetrant cancer therapies. · reverielabs.com | gone |
| 2016-06-01 | Bringing 3rd generation, nanopore sequencing to healthcare to solve… · shieldbio.com | gone |
| 2016-01-01 | AlphaFlow is a technology-driven investment manager. · alphaflow.com | gone |
| 2016-01-01 | YCUnima Fast and low-cost diagnostics for real time disease surveillance · unimadx.com | gone |
| 2019-06-01 | YCValiu USD mobile banking for LatAm's businesses and people · valiu.com | gone |
| 2022-01-01 | YCFello Grow money and win $1000 every week by saving and playing games · fello.in | gone |
| 2021-09-14 | hackerpen.io | gone |
| 2021-01-01 | Purchasing Software | Procure-to-Pay SaaS · controlhub.com | gone |
| 2016-01-01 | Funding platform for global insurance, starting with crop insurance… · worldcovr.com | gone |
| 2021-01-01 | YCUnfurl A virtual food hall that delivers · unfurlcuisine.com | gone |
| 2018-01-01 | YCOvipost Automated insect farming · ovipost.com | gone |
| 2020-01-01 | YCValienta Helping Dropshippers in Colombia run the business and increase sales · valienta.com | gone |
| 2021-06-01 | YCAkudo India's first learning-focused neobank for teenagers · akudo.in | gone |
| 2021-06-15 | tilodb.com | gone |
| 2022-06-21 | scenario.tech | gone |
| 2022-10-30 | skipbigtech.com | gone |
| 2021-06-01 | YCMine The AI personal finance company. · usemine.com | gone |
| 2021-01-01 | The payments solution for small scale construction. · go.build | gone |
| 2016-01-01 | YCPathmind Pathmind helps industrial engineers and simulation modelers achieve… · pathmind.com | gone |
| 2022-06-01 | YCDrip Shop and pay in installments anywhere · dripapp.com.br | gone |
| 2022-06-01 | YCWeltio First LatAm W3 WealthTech for AutoInvesting in securities & crypto · weltio.com | gone |
| 2020-01-01 | A digital well-being program to help people prevent or manage chronic… · breathewellbeing.in | gone |
| 2018-06-01 | A brand-new blend of sugars – made from plant fiber! · supplant.com | gone |
| 2020-01-01 | Homestead is a real estate development platform for homeowners · myhomestead.com | 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.
Older launches have had longer to die, so this slope is expected. A year that broke it would mean something is wrong with the checking.
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.