You asked about Deep Learning
40 people built something like it. 4 are gone.
That is 10% of the ones whose fate we could settle, against 23% across the whole register. 1 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2023-01-01 | Generative AI for protein design · diffuse.bio | still up |
| 2023-06-01 | YCCedana Fast, reliable, reproducible AI with GPU live migration · cedana.ai | still up |
| 2023-06-01 | Infuse knowledge into language models with just 10 samples · automorphic.ai | still up |
| 2023-06-01 | End-to-end content, learning, & deal intelligence for B2B sales teams · letter.ai | still up |
| 2023-06-01 | YCCasca Make Banking Magical · cascading.ai | still up |
| 2023-06-01 | Revenue Activation Platform · hyperbound.ai | still up |
| 2023-01-01 | YC222 the AI social facilitator for offline human to human interactions · 222.place | still up |
| 2023-01-01 | YCloopfour Workflow automation, without AI hallucinations. · loopfour.com | still up |
| 2023-01-01 | AI-Powered Super Mentor for Test Prep · superkalam.com | still up |
| 2023-06-01 | YCNumen Engineering a future without cancer deaths. · numen.com | still up |
| 2023-06-01 | YCFlint Personalized learning built for schools · flintk12.com | still up |
| 2023-01-01 | Automating Healthcare Revenue Cycle Management with AI Workforce · combinehealth.ai | still up |
| 2023-01-01 | YCCosine Fully Agentic SWE · cosine.sh | still up |
| 2023-01-01 | YCinBuild Workflow Automation for Construction Finance · inbuild.ai | still up |
| 2023-06-01 | Autonomous surgical robots · andromedasurgical.com | still up |
| 2023-01-01 | Performance-Optimized Influencer Marketing at Scale · 1stcollab.com | still up |
| 2023-01-01 | YCPierre Pierre is a new, opinionated, git platform. · pierre.co | still up |
| 2023-01-01 | YCScanbase The API for Diagnostic Test Analysis (COVID-19, FLU, RSV, STD,… · scanbase.com | still up |
| 2023-01-01 | YCBoundary The programming language for AI · boundaryml.com | still up |
| 2023-01-01 | The TikTok style corporate training platform · goodcourse.co | gone |
| 2023-06-01 | YCGuac AI-powered forecasting & replenishment for grocery · guac.com | still up |
| 2023-06-01 | YCSubsets AI-driven Retention Automation for subscription media businesses. · subsets.com | still up |
| 2023-01-01 | Developing long-lasting drug formulations 50% faster · persist-ai.com | still up |
| 2023-01-01 | YCLuca The Modern Pricing Engine for Retail · askluca.com | gone |
| 2023-06-01 | The AI-powered risk decision platform · trycatamaran.com | acquired |
| 2023-06-01 | Don't die of heart disease. Empirical is the first AI-native heart… · empirical.health | still up |
| 2023-01-01 | Dataset Management for AI Trainers · truthsuite.com | still up |
| 2023-01-01 | YCAriglad Knowledge base maintenance on auto-pilot · ariglad.com | still up |
| 2023-06-01 | YCStuddy An AI math tutor for every student · studdy.ai | still up |
| 2023-01-01 | YCVelos Platform to automate manual back-office work · tryvelos.com | still up |
| 2023-06-01 | Learn language with real-world content, at your level · readbean.app | still up |
| 2023-01-01 | AI for drug formulation · lavo.ai | gone |
| 2023-01-01 | Language learning with a conversational AI Tutor · univerbal.app | still up |
| 2023-06-01 | YCPropRise The AI platform for CRE investment teams · proprise.ai | still up |
| 2023-06-01 | YCTrainy Infrastructure for managing GPU clusters for training/serving. · trainy.ai | still up |
| 2023-01-01 | YCPoplarML Deploy Machine Learning Models with One Command · poplarml.com | still up |
| 2023-01-01 | YCPair AI Reimagining education with short form video and AI · pairai.com | still up |
| 2023-06-01 | Affordable carbon tracking solution for all businesses · greentally.ai | gone |
| 2023-01-01 | YCAtmeto We develop ML that optimizes how batteries in the grid store energy · atmeto.com | still up |
| 2023-06-01 | YCRimward Solar farm security software for existing cameras · rimward.ai | 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.