You asked about Search
15 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 | Applied research lab curating data solutions for foundation model… · afterquery.com | still up |
| 2025-01-01 | YCAthenaHQ Be the Answer in AI Search - AI SEO across SEO, GEO & AEO · athenahq.ai | still up |
| 2025-01-01 | We build networks of AIs to simulate high-value audiences · societies.io | still up |
| 2025-01-01 | YCTrata AI-powered research desk for hedge funds · trytrata.com | still up |
| 2025-09-01 | Infrastructure for AI labs to focus on research. · sf-tensor.com | still up |
| 2025-01-01 | YCNitrode Frontier AI research to advance game development · nitrode.com | still up |
| 2025-09-01 | YCMoss Real-time semantic search for Conversational AI · moss.dev | still up |
| 2025-06-01 | YCSerafis Narrative intelligence for investors · serafis.ai | still up |
| 2025-01-01 | YCFira Financial research platform for investment firms · firaresearch.com | still up |
| 2025-09-01 | YCPerseus Applied Lab focused on Search in Latent Spaces. · perseus.computer | still up |
| 2025-06-01 | YCTheora Building medical school for AI Agents · theorahq.com | still up |
| 2025-09-01 | AI-powered market due diligence for investment decisions · diligencesquared.com | still up |
| 2025-06-01 | YCPally Your personal AI Assistant · pally.com | still up |
| 2025-06-01 | YCKalinda Deep research for class action law firms · kalinda.ai | still up |
| 2025-06-01 | YCMotives Consumer focus groups run by AI · motives.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.