You asked about Infrastructure
27 people built something like it. 0 are gone.
That is 0% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2025-01-01 | YCMundo AI High Quality Multilingual Training Data for AI Models · mundoai.world | still up |
| 2025-06-01 | YCKERNEL Crazy fast, open source infra for AI agents to use the Internet · kernel.sh | still up |
| 2025-09-01 | YCBolna AI Voice AI to enable India's next billion · bolna.ai | still up |
| 2025-09-01 | Agentic AI for Society Builders · brickanta.com | still up |
| 2025-06-01 | Email Inboxes for AI Agents · agentmail.to | still up |
| 2025-06-01 | Compute substrate for AI agents · dedaluslabs.ai | still up |
| 2025-06-01 | YCLuminal Making AI run fast on any hardware. · luminal.com | still up |
| 2025-01-01 | YCOsmosis Reinforcement Learning (RL) for AI Agents · osmosis.ai | still up |
| 2025-09-01 | YCSciloop Expert STEM reasoning data for frontier AI labs. · sciloop.dev | still up |
| 2025-09-01 | Infrastructure for AI labs to focus on research. · sf-tensor.com | still up |
| 2025-06-01 | YCAutumn Billing infrastructure for AI · useautumn.com | still up |
| 2025-01-01 | YCFlowtel The AI Voice agents for hotels · flowtel.ai | still up |
| 2025-09-01 | YCMetorial Agentic infrastructure to power AI-native companies. · metorial.com | still up |
| 2025-06-01 | YCImprezia The World's First AI Ad Network. · imprezia.ai | still up |
| 2025-06-01 | Open source self-improving layer for AI agents · traceroot.ai | still up |
| 2025-06-01 | Build production-ready apps with AI · modelence.com | still up |
| 2025-09-01 | YCMSPilot Turn AI adoption into a recurring revenue line. · mspilot.io | still up |
| 2025-06-01 | YCPangolin Open networking and security for your workforce, AI agents, and infra · pangolin.net | still up |
| 2025-01-01 | Open Source React.js Library for AI Chat · assistant-ui.com | still up |
| 2025-06-01 | AI infrastructure for biosecurity · twentytwo.bio | still up |
| 2025-09-01 | API for parsing multimodal unstructured data · unsiloed.ai | still up |
| 2025-09-01 | YCLocus Payment infrastructure for AI agents · paywithlocus.com | still up |
| 2025-06-01 | Independent AI evaluations lab · llm-stats.com | still up |
| 2025-06-01 | YCPlaygent Sandboxes for AI agents · useplaygent.com | still up |
| 2025-01-01 | AWS for AI Agents · trytruffle.ai | still up |
| 2025-09-01 | AI Agents for Platform Engineering · usekestrel.ai | still up |
| 2025-09-01 | YCLemma Production Monitoring for AI agents · uselemma.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.