You asked about Security
28 people built something like it. 28 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2022-03-15 | securitypage.fyi | gone |
| 2022-03-31 | trustpage.com | gone |
| 2020-01-01 | YCDatree Datree prevents Kubernetes misconfigurations from reaching production · datree.io | gone |
| 2023-02-14 | openapi.security | gone |
| 2023-11-07 | trustypkg.dev | gone |
| 2021-01-14 | control.verygoodsecurity.com | gone~4mo |
| 2015-01-01 | YCThinAir Intelligent data security for teams · thinair.com | gone |
| 2021-02-09 | spatcher.io | gone~17mo |
| 2021-06-01 | Never code alone. · squire.ai | gone |
| 2021-01-21 | laravel-enlightn.com | gone~58mo |
| 2021-06-01 | YCProtego We help companies recover lost revenue from chargebacks · protegosolutions.io | gone |
| 2024-01-01 | YCTesseral The open source platform for managing identity in business software · tesseral.com | 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 |
| 2012-01-01 | Client-side encryption for your devices and the cloud. · documents.me | gone |
| 2015-01-01 | Actionable human trafficking intelligence · rescueforensics.com | gone |
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.