You asked about Security
21 people built something like it. 21 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2020-01-01 | YCDatree Datree prevents Kubernetes misconfigurations from reaching production · datree.io | gone |
| 2015-01-01 | YCThinAir Intelligent data security for teams · thinair.com | gone |
| 2021-06-01 | Never code alone. · squire.ai | gone |
| 2024-01-01 | YCTesseral The open source platform for managing identity in business software · tesseral.com | gone |
| 2021-06-01 | YCProtego We help companies recover lost revenue from chargebacks · protegosolutions.io | gone |
| 2020-01-01 | AI for security cameras · visualone.tech | gone |
| 2019-06-01 | YCLunaSec An Open Source dependency security tool that is smarter than the rest · lunasec.io | gone |
| 2022-06-01 | The IAM Policy Copilot · slauth.io | gone |
| 2014-06-01 | Security Guard Company Marketplace · bannerman.com | gone |
| 2021-01-01 | The solution for fine-grained access control in web3 · slashauth.com | gone |
| 2024-01-01 | YCAedilic Open-Source AI-generated image/deepfake detection · nonescape.com | gone |
| 2018-01-01 | YCEnvKey End-to-end encrypted configuration and secrets management · envkey.com | gone |
| 2016-06-01 | Metapacket is the first selective web gateway that stops malware by… · metapacket.com | gone |
| 2023-01-01 | YCBlyss End-to-end encrypted AI. · blyss.dev | gone |
| 2018-06-01 | YCFederacy Penetration testing and bug bounty platform. · federacy.com | gone |
| 2016-01-01 | Security patch notifications for servers. Build it, deploy it, and… · patchworksecurity.com | gone |
| 2015-06-01 | Enterprise Threat Detection: Tuning, Triage, and Analysis by Experts. · traversalnetworks.com | gone |
| 2021-01-01 | YCObserva Catch accidental database exposures before the bad guys · observa.com | gone |
| 2019-01-01 | Automating Cyber Security Incident Response Through Artificial… · sublimeblack.com | gone |
| 2015-01-01 | Actionable human trafficking intelligence · rescueforensics.com | gone |
| 2012-01-01 | Client-side encryption for your devices and the cloud. · documents.me | 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.