You asked about Time Series
16 people built something like it. 16 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2016-01-01 | YCUnima Fast and low-cost diagnostics for real time disease surveillance · unimadx.com | gone |
| 2014-01-01 | Real time Google Earth for agriculture -- imagery collected weekly… · terravion.com | gone |
| 2021-06-01 | Digital pharmacy for Latam, that saves you money and time. · fastfarma.com | gone |
| 2021-01-01 | YCNoya Radically reducing capital costs and build time for direct air capture · noya.co | gone |
| 2023-06-01 | YCUnhaze The right leads at the right time for B2B sales · unhaze.ai | gone |
| 2021-01-01 | YCAerotime Calendar that kills time fragmentation · aerotime.com | gone |
| 2020-06-01 | YCDuckly Video chat with real-time collaboration. · duckly.com | gone |
| 2020-01-01 | YCLilia Modern egg freezing for half the cost in half the time with top docs · hellolilia.com | gone |
| 2012-01-01 | YCCouple App that connects two phones and creates a private
timeline to share… · couple.me | gone |
| 2017-06-01 | YCGuggy Guggy is building the messaging app of the future with real time,… · guggy.com | gone |
| 2015-06-01 | We're changing the world of coffee, one personalized cup at a time. · sevacoffee.com | gone |
| 2015-01-01 | Real-time communication solution for retail and restaurant employees. · shiftmessenger.com | gone |
| 2014-06-01 | YCShout Real-Time Classifieds · useshout.com | gone |
| 2013-06-01 | YCFloobits Real-time collaborative editing in the browser with support for… · floobits.com | gone |
| 2024-01-01 | One-time, device-based treatment for heart failure · seleramedical.com | gone |
| 2022-06-01 | serverless platform for real-time data · denormalized.io | 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.