You asked about Gene Therapy
26 people built something like it. 0 are gone.
That is 0% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2025-01-01 | YCCalltree Enterprise-grade AI support reps for call centers · calltree.ai | still up |
| 2025-01-01 | The LLM Eval and Observability Platform for AI Quality · confident-ai.com | still up |
| 2025-06-01 | YCKnowlify The AI Explainer Video Maker · knowlify.com | still up |
| 2025-09-01 | YCAbsurd The Creative OS for AI video · absurd.com | still up |
| 2025-01-01 | An AI teammate that automatically updates your customer-facing docs · promptless.ai | still up |
| 2025-09-01 | YCKoyal Agentic AI Filmmaking Platform · koyal.ai | still up |
| 2025-09-01 | Simulate your customers with AI agents · expectedparrot.com | still up |
| 2025-01-01 | AI-driven exam prep · alice.tech | still up |
| 2025-09-01 | YCLunaBill AI Voice callers for healthcare billing teams · lunabill.com | still up |
| 2025-09-01 | YCVelvet Infra and data for interactive AI. · velvetlab.ai | still up |
| 2025-01-01 | YCa0.dev We make mobile apps using AI. · a0.dev | still up |
| 2025-09-01 | YCMSPilot Turn AI adoption into a recurring revenue line. · mspilot.io | still up |
| 2025-06-01 | World's largest crowdsourced benchmark for AI-generated design · designarena.ai | still up |
| 2025-01-01 | Open Source React.js Library for AI Chat · assistant-ui.com | still up |
| 2025-09-01 | YCExonic Exonic is an AI-native cell and gene therapeutics company. · exonic.ai | still up |
| 2025-09-01 | The first platform where families can create AI cartoons in minutes · pixleyai.com | still up |
| 2025-06-01 | YCClosera AI Shopping Agent for Your Ecommerce Store · closera.com | still up |
| 2025-01-01 | AI co-pilot for building plan review and building code compliance · permitify.com | still up |
| 2025-01-01 | YCSennu AI We turn traditional companies into AI companies · sennu.ai | still up |
| 2025-01-01 | AWS for AI Agents · trytruffle.ai | still up |
| 2025-01-01 | Character.AI with real time video avatars · dollyglot.com | still up |
| 2025-09-01 | Real World Environments and Data for AI · withspecific.com | still up |
| 2025-01-01 | YCBezel Digital AI humans that model clothes for e-commerce brands. · trybezel.com | still up |
| 2025-01-01 | YCTrava AI agents for global trade compliance · usetrava.com | still up |
| 2025-01-01 | AI for the physical world · generaltrajectory.com | still up |
| 2025-01-01 | YCTergle AI Agents for Audit · tergle.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.