You asked about Security
15 people built something like it. 2 are gone.
That is 13% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2024-01-01 | Autonomous offensive and defensive cybersecurity platform · codeant.ai | still up |
| 2024-06-01 | Automate security and privacy reviews · clearly-ai.com | still up |
| 2024-06-01 | Drone detection for US defense and national security · guardianrf.com | still up |
| 2024-06-01 | YCZeroPath Automatically find and fix your software vulnerabilities · zeropath.com | still up |
| 2024-01-01 | YCPazi Platform where autonomous companies are built · pazi.ai | still up |
| 2024-06-01 | YCUnbound Use AI tools without fear of data leakage · getunbound.ai | still up |
| 2024-01-01 | YCTesseral The open source platform for managing identity in business software · tesseral.com | gone |
| 2024-01-01 | Shiboleth automates lending compliance for financial institutions… · shiboleth.ai | still up |
| 2024-01-01 | YCRisotto Risotto auto-solves IT support requests using AI · tryrisotto.com | still up |
| 2024-01-01 | Security for AI-native developers · superagent.sh | still up |
| 2024-09-01 | The AI Security Engineer to Find and Fix Vulnerabilities · gecko.security | still up |
| 2024-06-01 | YCwinfunc ai-native security engineering for mission critical codebases · winfunc.com | still up |
| 2024-01-01 | YCAedilic Open-Source AI-generated image/deepfake detection · nonescape.com | gone |
| 2024-01-01 | YCTracecat The open source AI-native security automation platform · tracecat.com | still up |
| 2024-01-01 | LLM Security and Compliance · promptarmor.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.