You asked about Reinforcement Learning
71 people built something like it. 10 are gone.
That is 14% of the ones whose fate we could settle, against 23% across the whole register. 2 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2022-06-03 | courses.dibya.online | still up |
| 2022-04-04 | heyday.xyz | still up |
| 2022-03-02 | huemint.com | still up |
| 2022-10-03 | continuum.xyz | unverified |
| 2022-04-12 | damnnnn.com | gone |
| 2022-07-21 | banana.dev | still up |
| 2022-03-29 | cloud.mindsdb.com | unverified |
| 2022-03-18 | bytelegend.com | unverified |
| 2022-05-10 | getindx.com | gone |
| 2022-12-01 | lessons.nihongo-app.com | still up |
| 2022-01-01 | YCvoize We build the AI companion for nurses, to create time for care. · voize.de | still up |
| 2022-01-01 | YCGoJom One-stop-shop for Real Estate Solutions. · gojom.com | still up |
| 2022-10-19 | kinnu.xyz | still up |
| 2022-02-09 | nyckel.com | still up |
| 2022-07-12 | pixieapp.co | still up |
| 2022-01-26 | earlylearning.app | still up |
| 2022-05-24 | scrimba.com | still up |
| 2022-03-09 | tensil.ai | moved |
| 2022-01-01 | YCAntWalk An employee up-skilling platform for fast growing companies · antwalk.com | gone |
| 2022-03-10 | prepform.com | still up |
| 2022-01-01 | Compliant-Ready AI for the Enterprise · dynamo.ai | still up |
| 2022-03-10 | graphsignal.com | still up |
| 2022-01-01 | YCLanceDB Open-source, serverless vectordb for production-scale generative AI · lancedb.com | still up |
| 2022-12-30 | distilhn.com | still up |
| 2022-01-01 | YCSpade Spade is the data and AI platform for modern finance. · spade.com | still up |
| 2022-06-01 | General Autonomy for Industrial Vehicles · polymathrobotics.com | still up |
| 2022-01-01 | YCPINA WealthFront of Indonesia · pina.id | still up |
| 2022-01-01 | YCInvert Data analytics software for biomanufacturing. · invertbio.com | still up |
| 2022-01-01 | YCHomeRoom We Rent Your Property by the Room. You earn 50% more Rent. · livehomeroom.com | acquired |
| 2022-01-01 | Intelligent Process Automation for Lending. · fintelite.ai | still up |
| 2022-07-24 | languageroadmap.com | still up |
| 2022-01-08 | fachords.com | still up |
| 2022-01-01 | LLM for Legal in Brazil · lexter.ai | still up |
| 2022-08-04 | app.learningloop.org | gone |
| 2022-01-01 | YCMomento Building a full-stack auto insurer for the underserved in LatAm · tumomento.com | still up |
| 2022-07-21 | banana.dev | still up |
| 2022-06-01 | YCCerrion Video AI to automatically detect and respond to production line… · cerrion.com | still up |
| 2022-09-11 | vocab.ling-academy.com | still up |
| 2022-01-01 | YCAxis Knowledge base for corporate affairs teams · axis.xyz | still up |
| 2022-06-01 | Ironclad for construction · provision.com | still up |
| 2022-06-01 | YCFini Fini | Automate 80% of enterprise support with AI agents · usefini.com | still up |
| 2022-01-01 | Rapid medical data annotation · redbrickai.com | still up |
| 2022-08-02 | roshi.ai | still up |
| 2022-06-01 | We recycle plastic using engineered enzymes · birchbiosciences.com | still up |
| 2022-06-01 | Programming courses for experienced engineers · codecrafters.io | still up |
| 2022-01-01 | An intelligent, visual knowledge base for learning complex topics. · heptabase.com | still up |
| 2022-01-01 | YCRTHM Self-learning care for complex illness · rthm.com | still up |
| 2022-01-01 | YCMySivi MySivi - AI English Speaking Practice App · mysivi.ai | still up |
| 2022-06-01 | YCLamin Open data platform for traceable, multimodal AI · lamin.ai | still up |
| 2022-01-01 | 10x-1000x faster compute for Neural Network training · strongcompute.com | still up |
| 2022-01-01 | YCFlike Flike's AI crafts sales emails that convert · flike.app | gone |
| 2022-04-28 | exafunction.com | unverified |
| 2022-04-13 | letmeguess.phelps.au | unverified |
| 2022-05-08 | devever.net | still up |
| 2022-01-01 | YCPloomber Heroku for AI · ploomber.io | gone |
| 2022-01-01 | YCBobidi Restaurant Loyalty Using Quiz · upswell.ai | still up |
| 2022-01-01 | Promotion management platform · cherry.ai | gone |
| 2022-06-01 | YCNuMind Create custom NLP models · numind.ai | still up |
| 2022-01-01 | YCHypaHub A Cloud-Based Bioinformatics and AI Platform · hypahub.com | acquired |
| 2022-04-14 | ramanlabs.in | 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.