You asked about Networks
13 people built something like it. 4 are gone.
That is 40% of the ones whose fate we could settle, against 23% across the whole register. 3 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2014-01-01 | YCSnapdocs digital mortgage closing · snapdocs.com | still up |
| 2018-01-01 | YCZyper Recreating social networks for brands. · zyper.com | acquired |
| 2025-01-01 | We build networks of AIs to simulate high-value audiences · societies.io | still up |
| 2015-01-01 | YCSmyte Smyte stops bad actors on social networks and marketplaces. · smyte.com | acquired |
| 2026-06-01 | The AI-powered operating system for radiology networks · avocasystems.com | still up |
| 2022-01-01 | YCNetmaker Automated WireGuard networks for distributed systems and Kubernetes · netmaker.io | still up |
| 2016-01-01 | YCIndex Mapping the world's professional relationships. · index.io | gone |
| 2026-01-01 | AI operating system for mega-scale satellite networks. · constellation.space | still up |
| 2025-06-01 | YCPangolin Open networking and security for your workforce, AI agents, and infra · pangolin.net | still up |
| 2014-06-01 | YCBeep Cellular networks for IoT. · beepnetworks.com | gone |
| 2010-06-01 | YCFridge Disposable social networks. · frid.ge | acquired |
| 2024-06-01 | Software and hardware to run neural networks faster and cheaper · deepsilicon.net | gone |
| 2015-06-01 | Enterprise Threat Detection: Tuning, Triage, and Analysis by Experts. · traversalnetworks.com | gone |
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.