You asked about B2B
215 people built something like it. 15 are gone.
That is 7% of the ones whose fate we could settle, against 23% across the whole register. 7 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2024-01-01 | YCLegora The AI workspace for lawyers · legora.com | still up |
| 2024-01-01 | YCModel ML AI Workspace for Financial Services. · modelml.com | still up |
| 2024-01-01 | Supercharge Your Contact Center Operations with AI Phone Agents · retellai.com | still up |
| 2024-06-01 | AI Agents for collections · domu.ai | still up |
| 2024-06-01 | YCTaxGPT AI tax assistant for professionals and businesses · taxgpt.com | still up |
| 2024-01-01 | YCGumloop The multiplayer AI agent builder. Let anyone build, IT controls access · gumloop.com | still up |
| 2024-01-01 | AI Workforce for the Insurance Industry · furtherai.com | still up |
| 2024-01-01 | YCGreptile AI code review agent with complete context of your codebase · greptile.com | still up |
| 2024-01-01 | YCPointOne AI Time Platform for Law Firms · pointone.com | still up |
| 2024-01-01 | Accelerate Medication Access with AI · runtrellis.com | still up |
| 2024-01-01 | YCAlex Alex is the AI recruiter for hiring great people. · alex.com | still up |
| 2024-01-01 | Autonomous offensive and defensive cybersecurity platform · codeant.ai | still up |
| 2024-01-01 | YCRespan Self-driving observability, evals, and gateway for AI agents · respan.ai | still up |
| 2024-06-01 | YCTandem AI-native office leasing broker · tandemspace.com | still up |
| 2024-01-01 | YCOpen Enterprise AI customer support · open.cx | still up |
| 2024-01-01 | YCOnyx Open Source AI Chat · onyx.app | acquired |
| 2024-01-01 | YCToma AI for Underserved Industries · toma.com | still up |
| 2024-01-01 | AI Inference Platform for Drug Discovery · tamarind.bio | still up |
| 2024-06-01 | YCArva AI AI Agents to scale AML, KYB and KYC operations · arva.ai | still up |
| 2024-06-01 | AI powered ERP for Construction · merlinai.co | still up |
| 2024-06-01 | Automate security and privacy reviews · clearly-ai.com | still up |
| 2024-06-01 | Helping furniture companies create product visuals with AI · presti.ai | still up |
| 2024-09-01 | YCtelli AI phone agents that convert · telli.com | still up |
| 2024-09-01 | YCCekura Voice AI and Chat AI agents: Testing and Observability · cekura.ai | still up |
| 2024-01-01 | YCOffDeal AI-native investment bank for small businesses · offdeal.io | still up |
| 2024-01-01 | YCConduit AI Agents for Hospitality · conduit.ai | still up |
| 2024-06-01 | YCSepal AI Data Development for Advanced AI · sepalai.com | acquired |
| 2024-01-01 | YCCarma The AI Operating System For Modern Fleets. · joincarma.com | still up |
| 2024-06-01 | YCEntangl Find & resolve issues in data center engineering & operations using AI · entangl.com | still up |
| 2024-06-01 | YCIntryc Intryc uses AI to automate quality assurance for customer support · intryc.com | still up |
| 2024-01-01 | ProSights is a data / AI transformation partner to PE-backed portcos. · prosights.co | still up |
| 2024-01-01 | YCDraftaid Go from 3D models to CAD drawings using AI · draftaid.io | still up |
| 2024-01-01 | YCsync. AI lipsync tool for video content creators · sync.so | still up |
| 2024-01-01 | YCReform AI Agents for high-stakes work. · reformhq.com | still up |
| 2024-01-01 | An AI-powered supply chain compliance engine · retailreadyai.com | still up |
| 2024-06-01 | YCZeit AI The autonomous data engineer for the mid-market · zeit-ai.com | still up |
| 2024-01-01 | YCTopo All-in-one AI platform for outbound sales · topo.io | still up |
| 2024-09-01 | YCArchil The high-performance file system that connects AI to data · archil.com | still up |
| 2024-06-01 | YCParahelp Build an AI support agent that securely uses all your tools · parahelp.com | still up |
| 2024-06-01 | AI voice that sells · usesimple.ai | still up |
| 2024-06-01 | Capitol: the sovereign operating system for intelligence. · capitol.ai | still up |
| 2024-06-01 | YCDistro The AI co-pilot for sales reps at industrial wholesale distributors. · distro.app | still up |
| 2024-01-01 | YCZep AI Agent Context Is Hard. We Fixed It. · getzep.com | still up |
| 2024-06-01 | YCKastle AI employee for consumer lending · kastle.ai | still up |
| 2024-06-01 | YCCoval Simulation & Evaluation that scales voice and chat AI agents · coval.dev | still up |
| 2024-06-01 | YCMem0 The Memory layer for AI Agents · mem0.ai | still up |
| 2024-06-01 | YCPhonely AI call centers · phonely.ai | still up |
| 2024-06-01 | YCPax AI Broker for Tariff Refunds · paxai.com | still up |
| 2024-06-01 | Automate circuit board design using AI · diode.computer | still up |
| 2024-06-01 | YCDavid AI Data for audio AI · withdavid.ai | still up |
| 2024-01-01 | AI-voice agents that are indistinguishable from humans. · marrlabs.com | still up |
| 2024-01-01 | YCROE AI for risk and compliance · getroe.ai | still up |
| 2024-01-01 | YCRaindrop Sentry for AI Agents · raindrop.ai | still up |
| 2024-01-01 | YCGetCrux AI Creative Strategist · getcrux.ai | still up |
| 2024-01-01 | YCFeldy Field-First AI for home services · feldy.ai | still up |
| 2024-01-01 | YCParadigm A reimagined workspace with AI at its core · paradigmai.com | still up |
| 2024-06-01 | AI agent for Accounts Receivable · fazeshift.com | still up |
| 2024-06-01 | YCSpur Spur is your AI QA Engineer. Test your websites with natural language. · spurtest.com | still up |
| 2024-06-01 | Freight bill audits, AP, AR automation for freight brokers with… · lighthouz.ai | still up |
| 2024-06-01 | Complete QA platform for voice agents · hamming.ai | 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.