You asked about SaaS
32 people built something like it. 32 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 | AI-enabled automation of diagnostic radiology workflow and reporting. · synapsica.com | gone |
| 2022-01-01 | YCngrow.ai Low-code SaaS for marketing in push notifications · ngrow.ai | gone |
| 2020-01-01 | YCSprintAI AI-led platform for inventory and fulfillment optimization · getsprint.ai | gone |
| 2022-06-01 | AI-assisted CX tool built with your knowledge. · zoltarlabs.com | gone |
| 2020-01-01 | YCDropbase AI app builder for internal tools. Build back-office software faster… · dropbase.io | gone |
| 2015-06-01 | YCVOIQ Conversational AI VoiceBots for Business · voiq.com | gone |
| 2021-06-01 | Never code alone. · squire.ai | gone |
| 2020-06-01 | YCPayflow AI FP&A Agent for insights, reports, planning and forecasting. · payflow.ai | gone |
| 2021-06-01 | Building Gong.io for offline retail. · outloud.ai | gone |
| 2021-06-01 | Mobile app for CPG brands to connect to millions of stores globally · milkyway.ai | gone |
| 2022-06-01 | No-code data curation for LLM fine-tuning and evaluation. · airtrain.ai | gone |
| 2022-01-01 | YCCoffeeAI Instant, hyper-personalized, AI-powered outreach messages · get-coffee.ai | gone |
| 2022-01-01 | YCNophin AI Deal Screening Analyst for Commercial Real Estate Acquisitions · nophin.com | gone |
| 2022-06-01 | API for Retrieval Augmented Generation · superpowered.ai | gone |
| 2022-06-01 | YCDialect AI copilot for forms, questionnaires & RFX · usedialect.com | gone |
| 2022-06-01 | AI Sales Rep for Website Intent Signals · penguinai.app | gone |
| 2022-06-01 | YCStellar AI-powered business goals · stellarapp.io | gone |
| 2021-01-01 | YCCodeball AI-Powered Code Review · codeball.ai | gone |
| 2023-06-01 | AI Overview Search, as a Service · branch-ai.com | gone |
| 2023-01-01 | YCStruct Multi-lingual AI Voice Agents · struct.app | gone |
| 2023-01-01 | YCFabius AI to improve Sales Calls · fabius.io | gone |
| 2021-06-01 | Sales AI that helps revenue teams move faster and close more deals. · firstquadrant.ai | gone |
| 2024-06-01 | AI document creation and data management for clinical trials · baselinetrials.com | gone |
| 2024-06-01 | AI medical summaries in minutes · riskangle.com | gone |
| 2024-01-01 | Copilot for radiologists · radmate.ai | gone |
| 2024-01-01 | Your team’s AI powered communication tool · atpatchwork.com | gone |
| 2024-01-01 | The world's best presentation editor, powered by AI. · thorntale.com | gone |
| 2024-06-01 | YCPre The AI accountability agent for startup founders · buildwithpre.com | gone |
| 2022-06-01 | YCMercator AI-assisted data analytics · mercator.tech | gone |
| 2023-01-01 | AI-powered data extraction engine · indexical.dev | gone |
| 2023-01-01 | Resolve PR check failures instantly with AI · technician.dev | gone |
| 2021-06-01 | YCOpkit AI phone calls for the US healthcare industry · opkit.co | 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.