You asked about Market Research
17 people built something like it. 1 is gone.
That is 6% of the ones whose fate we could settle, against 23% across the whole register. 1 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2023-06-01 | YCOutset AI-powered user interviews · outset.ai | still up |
| 2023-07-08 | stockstack.ai | gone |
| 2023-01-01 | YCVersive AI-first user research platform · getversive.com | still up |
| 2023-06-01 | AI Operating System for Private Market Investors · vectorshift.ai | still up |
| 2023-01-01 | YC222 the AI social facilitator for offline human to human interactions · 222.place | still up |
| 2023-06-01 | AI enabled marketplace matching trucks with jobs · fleetworks.ai | still up |
| 2023-06-28 | blogseo.ai | still up |
| 2023-10-11 | blaze.ai | still up |
| 2023-06-01 | YCSID AI research lab for retrieval · sid.ai | still up |
| 2023-06-01 | YCTwine ai revenue engine for service businesses · usetwine.com | still up |
| 2023-06-01 | YCNowadays AI-native platform for corporate meetings and events · nowadays.ai | still up |
| 2023-06-01 | Building the AI-powered marketing ops platform that turns website… · withsurface.com | still up |
| 2023-09-13 | solutions.lykdat.com | moved |
| 2023-06-01 | The API for LLM tool use · opentools.com | still up |
| 2023-01-01 | YCFactIQ Investment research data for AI agents · factiq.com | still up |
| 2023-01-01 | YCBooth AI Generative AI Photographer for E-Commerce · booth.ai | acquired |
| 2023-01-01 | YCPair AI Reimagining education with short form video and AI · pairai.com | still up |
| 2023-01-01 | YCEpsilon AI Search Engine for Academic Research · epsilon-ai.com | still up |
How this compares
Y Combinator reports its own outcomes, including acquisitions. The other two are judged by asking the domain, so they are not measured the same way and are never averaged together.
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.