You asked about Hardware
13 people built something like it. 1 is gone.
That is 8% of the ones whose fate we could settle, against 23% across the whole register. 1 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | YCGridware Protecting the grid today, preparing the grid for tomorrow · gridware.io | still up |
| 2021-06-01 | Turning space into a transportation layer for Earth · inversionspace.com | still up |
| 2021-06-01 | YCFerveret Nuclear-inspired cooling that turns wasted power into more AI compute · ferveret.com | still up |
| 2021-01-01 | YCTilt Bringing the joy of cycling to millions of Indians · tilt.bike | still up |
| 2021-01-01 | YCAurabeat Providing clean, safe, virus free air for homes, buildings and cars · aurabeattech.com | still up |
| 2021-01-01 | GreaseBoss verifes industrial machinery is greased correctly · greaseboss.com.au | still up |
| 2021-01-01 | Desktop DNA Printer. The Nespresso Machine for DNA. · kilobaser.com | still up |
| 2021-06-01 | YCRMFG Advanced Contract MFG for fast moving hardware companies · rmfg.com | still up |
| 2021-06-01 | Surgical robotics for every operating room · revolvesurgical.com | still up |
| 2021-06-01 | Portable cryoablation to prevent cervical cancer · ananya.health | still up |
| 2021-06-01 | YCJupe Just add land · jupe.com | gone |
| 2021-01-01 | Building robots to automate commercial concrete construction. · rointech.com | acquired |
| 2021-06-01 | YCLiv Labs Pelvic floor fitness made easy · livlabsfitness.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.