You asked about Deepfake Detection
27 people built something like it. 4 are gone.
That is 16% of the ones whose fate we could settle, against 23% across the whole register. 2 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-06-01 | YCVerihubs AI-powered Deepfake Detection · verihubs.com | still up |
| 2022-01-01 | Enterprise Deepfake Detection · realitydefender.com | still up |
| 2024-01-01 | YCAedilic Open-Source AI-generated image/deepfake detection · nonescape.com | gone |
| 2018-06-01 | YCInscribe AI Document Fraud Detection for Banks, Credit Unions & Lenders · inscribe.ai | still up |
| 2021-06-01 | YCAOA Dx Blood Test for Early Detection of Ovarian Cancer · aoadx.com | still up |
| 2016-01-01 | YCCastle Block bots & bad behavior · castle.io | still up |
| 2015-01-01 | YCX-Zell Early, pain-free cancer detection. · x-zell.com | still up |
| 2022-06-01 | Agentic Intelligence Layer for Merchant Risk Decisions · ballerine.com | still up |
| 2021-06-01 | YCSlope The B2B Payments Platform · slopepay.com | still up |
| 2024-06-01 | Drone detection for US defense and national security · guardianrf.com | still up |
| 2022-06-01 | Enterprise software for enterprise risk and cyber fraud intelligence · overwatchdata.ai | still up |
| 2015-01-01 | YCSmyte Smyte stops bad actors on social networks and marketplaces. · smyte.com | acquired |
| 2017-06-01 | YCDarmiyan Early detection of Alzheimer's disease · darmiyan.com | still up |
| 2024-01-01 | YCIndemni Cargo Theft and Fraud Prevention Platform · indemni.com | still up |
| 2024-06-01 | Defect detection for manufacturing built from CAD and synthetic data. · bucket.bot | still up |
| 2026-01-01 | YCMouseCat AI to fight financial crime · mousecat.ai | still up |
| 2023-01-01 | YCFinic The AI fraud hunter · finic.ai | still up |
| 2023-01-01 | AI to increase payment acceptance and reduce fraud for businesses · corgilabs.ai | still up |
| 2026-09-01 | AI Claims Investigator for Insurance · gethesperai.com | still up |
| 2016-01-01 | Diagnostic platform for early detection of liver disease · luministlabs.com | acquired |
| 2014-06-01 | YCBikanta Nano-diamonds for cancer detection · bikanta.com | gone |
| 2024-01-01 | Custom video detection models in less than 5 minutes · dragoneye.ai | still up |
| 2025-09-01 | YCHelonic Automatic Construction Drawing Clash Detection · helonic.com | still up |
| 2021-06-01 | Immediate stroke detection at home · zeitmedical.com | still up |
| 2015-06-01 | Enterprise Threat Detection: Tuning, Triage, and Analysis by Experts. · traversalnetworks.com | gone |
| 2016-01-01 | YCSilver Low cost consumer device for toxin detection. · scansilver.com | gone |
| 2016-01-01 | Detect Gunshots | Inform Law Enforcement | Empower First Responders · amberbox.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.