You asked about Dental
11 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 |
|---|---|---|
| 2024-01-01 | YCArini AI receptionist for dentists · arini.ai | still up |
| 2025-01-01 | AI for insurance verification & billing at dental clinics · toothy.ai | still up |
| 2021-06-01 | Automation for dental clinics and insurance companies. · adra.ai | still up |
| 2024-06-01 | YCDodo AI agents that handle communications for clinics · dodo.ai | still up |
| 2021-06-01 | YCRinse We're building the One Medical for dental · rinse.dental | still up |
| 2022-01-01 | Accidental Death Insurance for Surgery · samos.insure | still up |
| 2026-01-01 | AI front & back office agent for dental practices · patientdesk.ai | still up |
| 2024-09-01 | YCAvora Agents for dental operations · getavora.ai | still up |
| 2025-01-01 | YC10x AI Sales Teams for Dental Practices · 10xdental.com | still up |
| 2026-06-01 | YCDenta Dental Insurance · denta.com | still up |
| 2025-06-01 | YCAlara Procurement Platform for Dental Offices · alaradental.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.