You asked about B2B
177 people built something like it. 2 are gone.
That is 1% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2025-01-01 | YCSpott AI-native ATS/CRM for recruiting firms · spott.io | still up |
| 2025-01-01 | YCMastra The Javascript framework for building AI agents, from the Gatsby devs · mastra.ai | still up |
| 2025-06-01 | YCGETASAP AI-Native Fresh Produce Logistics · getasap.us | still up |
| 2025-01-01 | YCMundo AI High Quality Multilingual Training Data for AI Models · mundoai.world | still up |
| 2025-09-01 | YCUplane Replace marketing agencies with AI · uplane.com | still up |
| 2025-06-01 | YCKERNEL Crazy fast, open source infra for AI agents to use the Internet · kernel.sh | still up |
| 2025-09-01 | YCBolna AI Voice AI to enable India's next billion · bolna.ai | still up |
| 2025-01-01 | AI hiring platform powered by expert recruiters · contrario.ai | still up |
| 2025-01-01 | YCMercura AI Quote and Order Automation for Distributors & Manufacturers · mercura.ai | still up |
| 2025-01-01 | YCCifrato AI Accountant for Accounting Firms · cifrato.ai | still up |
| 2025-06-01 | Secure frontier AI for government & adjacent knowledge work · vulcan.ai | still up |
| 2025-01-01 | AI powered operating system for distributors and OEMs · salespatriot.com | still up |
| 2025-06-01 | YCF2 The AI platform for private markets investors · f2.ai | still up |
| 2025-09-01 | YCLexi AI Operating System for Legal Teams · getlexi.io | still up |
| 2025-01-01 | YCCalltree Enterprise-grade AI support reps for call centers · calltree.ai | still up |
| 2025-01-01 | YCWeave AI to understand and then route engineering work · weaveos.com | still up |
| 2025-01-01 | AI voice and texting agents · leapingai.com | still up |
| 2025-01-01 | YCFuse AI Agentic Sales Platform · fuseai.com | still up |
| 2025-01-01 | YCAthenaHQ Be the Answer in AI Search - AI SEO across SEO, GEO & AEO · athenahq.ai | still up |
| 2025-01-01 | YCCardamon AI compliance co-pilot for regulated financial businesses · cardamon.ai | still up |
| 2025-09-01 | Agentic AI for Society Builders · brickanta.com | still up |
| 2025-06-01 | YCMagnetic AI Tax Preparer for CPA firms · magnetictax.com | still up |
| 2025-06-01 | YCFinto AI accounting for enterprise finance teams · gofinto.com | still up |
| 2025-06-01 | Email Inboxes for AI Agents · agentmail.to | still up |
| 2025-09-01 | YCMOVEdot AI Agents for Hardware Engineering · movedot.ai | still up |
| 2025-06-01 | YCWafer AI that makes AI fast · wafer.ai | still up |
| 2025-09-01 | YCZalos Hire Zalos AI workers to run your finance department · zalos.ai | still up |
| 2025-06-01 | Compute substrate for AI agents · dedaluslabs.ai | still up |
| 2025-06-01 | Replacing the restaurant phone line with Voice AI · certus-ai.com | still up |
| 2025-06-01 | Tiny Edge AI For Tiny Devices · cactuscompute.com | still up |
| 2025-06-01 | YCComena AI agents for distributors and manufacturers to automate order entry. · comena.ai | still up |
| 2025-09-01 | AI agents for your healthcare back-office operations. · goclicks.ai | still up |
| 2025-01-01 | AI performance monitoring for factory workers · optifye.ai | still up |
| 2025-09-01 | YCZavo AI Operating System for Restaurants · zavopay.com | still up |
| 2025-06-01 | Analyze any footage, without training a model · ondeckai.com | still up |
| 2025-09-01 | YCProx AI product specialists for equipment manufacturers · useprox.com | still up |
| 2025-06-01 | YCLuminal Making AI run fast on any hardware. · luminal.com | still up |
| 2025-06-01 | We help products get discovered & used by AI agents. · promptingcompany.com | still up |
| 2025-01-01 | The LLM Eval and Observability Platform for AI Quality · confident-ai.com | still up |
| 2025-06-01 | YCGolpo Create Whiteboard Explainer Videos with AI from a Prompt or Document · video.golpoai.com | still up |
| 2025-01-01 | YCOsmosis Reinforcement Learning (RL) for AI Agents · osmosis.ai | still up |
| 2025-09-01 | YCAbsurd The Creative OS for AI video · absurd.com | still up |
| 2025-06-01 | YCEmbedder Hardware-Aware AI for Embedded Software Development · embedder.com | still up |
| 2025-09-01 | Infrastructure for AI labs to focus on research. · sf-tensor.com | still up |
| 2025-09-01 | Zero-trust authentication, authorization, and auditing for AI agents · multifactor.com | still up |
| 2025-09-01 | YCSciloop Expert STEM reasoning data for frontier AI labs. · sciloop.dev | still up |
| 2025-01-01 | AI agents for CX teams, starting with training and QA. · solidroad.com | still up |
| 2025-06-01 | YCKnowlify The AI Explainer Video Maker · knowlify.com | still up |
| 2025-01-01 | YCVetnio AI Copilot that automates admin work for veterinary professionals · vetnio.com | still up |
| 2025-09-01 | AI for detecting patent infringements · patentwatch.ai | still up |
| 2025-09-01 | YCitem The AI-Native CRM that works for you · item.app | still up |
| 2025-01-01 | YCTrata AI-powered research desk for hedge funds · trytrata.com | still up |
| 2025-01-01 | Voice AI teams for medicare agencies. · carecycle.ai | still up |
| 2025-06-01 | YCJanet AI Agents that learn your company and work 24/7 · janet.ai | still up |
| 2025-06-01 | YCHera AI Motion Designer · hera.video | still up |
| 2025-06-01 | YCAltur Voice AI Agents for Debt Collection · altur.io | still up |
| 2025-06-01 | YCAvent AI agents for industrial commerce · aventindustrial.com | still up |
| 2025-01-01 | An AI teammate that automatically updates your customer-facing docs · promptless.ai | still up |
| 2025-09-01 | YCLapis AI that creates and runs ads, end-end · trylapis.com | still up |
| 2025-09-01 | YCMoss Real-time semantic search for Conversational AI · moss.dev | 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.