You asked about Solar Power
Nobody in the register described anything this way.
| Launched | What it was | Today |
|---|---|---|
| 2014-01-01 | YCUnbabel AI-powered Language Operations platform · unbabel.com | acquired |
| 2020-06-01 | AI-powered user assistance platform · command.ai | acquired |
| 2020-01-01 | YCPowerX AI powered sensors that save energy, water and emissions · powerx.co | acquired |
| 2020-06-01 | Combining 3D cell culture & AI to translate drugs to clinical success · knownmed.com | acquired |
| 2016-01-01 | YCCaper Plug-and-play cashier-less retail powered by computer vision and AI · caper.ai | acquired |
| 2018-01-01 | YCEdwin Edwin is virtual English tutor - an AI-powered service for learning… · edwin.ai | acquired |
| 2018-06-01 | YCPhiar We are developing a revolutionary AI-powered augmented reality… · phiar.net | acquired |
| 2016-01-01 | YCNova Nova puts the power of AI to work for you, enabling a more continuous… · nova.ai | acquired |
| 2021-06-01 | AI-Powered Business Development for Scientific Organizations · firstignite.com | acquired |
| 2020-06-01 | YCBrevy Empower your customer service team through AI & automation. · brevy.com | acquired |
| 2019-01-01 | YCWindsor AI Powered Personalized Videos · windsor.io | acquired |
| 2023-01-01 | YCOfOne AI-powered order taker for restaurant drive-thrus · of.one | acquired |
| 2023-06-01 | The AI-powered risk decision platform · trycatamaran.com | acquired |
| 2023-06-01 | YCWatto AI AI-powered McKinsey-quality reports in seconds · watto.ai | acquired |
| 2021-06-01 | YCMentum AI-Powered Assistant for Procurement and Strategic Sourcing · getmentum.com | acquired |
| 2020-01-01 | App offering AI powered workout plans with anytime access to coaches · fitnessai.com | acquired |
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.