You asked about Hard Tech
67 people built something like it. 3 are gone.
That is 4% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2024-09-01 | YCInnate Personal AI Robots · innate.bot | still up |
| 2024-06-01 | AI that operates quantum computers for scientific discovery · conductorquantum.com | still up |
| 2024-06-01 | Energy efficient chips for AI · zscc.ai | still up |
| 2024-01-01 | YCLegora The AI workspace for lawyers · legora.com | still up |
| 2024-06-01 | Corgi is building an AI financial infrastructure company · corgi.com | still up |
| 2024-06-01 | AI Agents for collections · domu.ai | still up |
| 2024-06-01 | YCTaxGPT AI tax assistant for professionals and businesses · taxgpt.com | still up |
| 2024-06-01 | YCFINNY AI The organic growth engine for financial advisors · finny.com | still up |
| 2024-01-01 | YCAlex Alex is the AI recruiter for hiring great people. · alex.com | still up |
| 2024-06-01 | YCTandem AI-native office leasing broker · tandemspace.com | still up |
| 2024-01-01 | AI Inference Platform for Drug Discovery · tamarind.bio | still up |
| 2024-06-01 | YCArva AI AI Agents to scale AML, KYB and KYC operations · arva.ai | still up |
| 2024-01-01 | YCArini AI receptionist for dentists · arini.ai | still up |
| 2024-01-01 | YCClarion The AI communication layer for healthcare · clarionhealth.com | still up |
| 2024-06-01 | YCUsul AI Platform for Winning Defense & Government Contracts · usul.com | still up |
| 2024-01-01 | YCOffDeal AI-native investment bank for small businesses · offdeal.io | still up |
| 2024-09-01 | YCSphinx AI Compliance Analysts for Banks & Fintechs · sphinxhq.com | still up |
| 2024-01-01 | ProSights is a data / AI transformation partner to PE-backed portcos. · prosights.co | still up |
| 2024-06-01 | AI-native HOA Management Company · assemblyhoa.com | still up |
| 2024-09-01 | Automating consumer debt collection with AI · collectwise.com | still up |
| 2024-01-01 | AI research lab automating all of investing · ehl.markets | still up |
| 2024-06-01 | Automate circuit board design using AI · diode.computer | still up |
| 2024-01-01 | YCZep AI Agent Context Is Hard. We Fixed It. · getzep.com | still up |
| 2024-01-01 | YCROE AI for risk and compliance · getroe.ai | still up |
| 2024-09-01 | AI Workers for Healthcare Orgs to Find, Call & Schedule More Patients. · careforce.ai | still up |
| 2024-06-01 | AI agent for Accounts Receivable · fazeshift.com | still up |
| 2024-01-01 | YCHazel AI-enabled procurement for government · hazelai.com | still up |
| 2024-06-01 | YCSimCare AI avatars to scale healthcare training. · simcare.ai | still up |
| 2024-06-01 | YCFinosu AI Native Consumer Loan Servicer · finosu.com | still up |
| 2024-06-01 | YC&AI Collaborative workspace for patent litigators · tryandai.com | still up |
| 2024-06-01 | The Enablement Layer for Physical AI · saphira.ai | still up |
| 2024-06-01 | YCDodo AI agents that handle communications for clinics · dodo.ai | still up |
| 2024-01-01 | YCPowder AI Agents for precise document analysis · powderfi.com | still up |
| 2024-09-01 | YCMetreecs AI-powered demand forecasting for retail · metreecs.com | still up |
| 2024-06-01 | YCPlanbase AI workforce management for healthcare · joinplanbase.com | still up |
| 2024-01-01 | YCAndy AI Faster clinical documentation for home health nurses · with-andy.com | still up |
| 2024-09-01 | YCSymphony Voice AI sims for next-gen employee training · getsymphony.co | still up |
| 2024-06-01 | AI For Litigation · drafttherecord.com | still up |
| 2024-06-01 | Faster, more profitable background checks with AI · superunit.com | still up |
| 2024-06-01 | Gen AI molecular simulations that reproduce wetlab results · angstrom-ai.com | still up |
| 2024-01-01 | YCMathos Ultimate AI Math Problem Solver to Revolutionize Personalized Learning · info.mathos.ai | still up |
| 2024-09-01 | Software for AI-powered traffic lights · roundabout.tech | still up |
| 2024-01-01 | YCMonumint Conversational AI purpose-built for financial services · monumint.com | still up |
| 2024-01-01 | AI Assistant for Excel · usecarousel.com | still up |
| 2024-06-01 | YCcamfer Building the world’s first AI mechanical engineer. · camfer.dev | gone |
| 2024-01-01 | YCTower M&A due diligence platform powered by AI · withtower.com | still up |
| 2024-09-01 | YCRiskCube AI insurance company · riskcube.com | still up |
| 2024-09-01 | AI for life sciences documents · raycaster.ai | still up |
| 2024-06-01 | YCRentFlow The AI infrastructure for cash-flow-aligned business rent · therentflow.com | still up |
| 2024-06-01 | YCModus Unlock revenue per employee with AI-powered headcount management · himodus.com | still up |
| 2024-06-01 | The AI scientist for always-on biodefense · aminoanalytica.com | still up |
| 2024-06-01 | YCFuse AI-powered workflow automation for US healthcare providers. · fuseinsight.com | still up |
| 2024-01-01 | The AI copilot for health insurance brokers. · blumebenefits.com | gone |
| 2024-01-01 | YCAveryIQ AI Copilot for Property Managers and Landlords · averyiq.com | still up |
| 2024-09-01 | AI agents to automate corporate transactions · pearsonlabs.ai | still up |
| 2024-01-01 | AI agent for construction drawings review · inspectmind.ai | still up |
| 2024-09-01 | AI Data Center Design · archilabs.ai | still up |
| 2024-06-01 | YCRescript AI for Legal & Public Policy Teams · rescript.ai | still up |
| 2024-06-01 | AI-powered settlement for financial securities · tradeflowai.com | still up |
| 2024-09-01 | Scaling Genomic AI for Embryo Selection · reticular.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.