You asked about Small Modular Reactors
7 people built something like it. 7 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | The payments solution for small scale construction. · go.build | gone |
| 2012-06-01 | Canopy Labs automates customer analytics for small and medium-sized… · canopylabs.com | gone |
| 2015-06-01 | Worlds smallest and friendliest café franchise. "The Bike-Powered… · wheelyscafe.com | gone |
| 2022-06-01 | YCDelegasi Automated accounting service for small businesses in Indonesia · delegasi.co | gone |
| 2014-06-01 | YCFlytenow Ride sharing for small planes · flytenow.com | gone |
| 2015-01-01 | Launch small satellites · bagaveev.com | gone |
| 2017-06-01 | We're making it easier to do sustainable farming. · modularscience.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.