You asked about B2B
77 people built something like it. 77 are gone.
That is 100% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | YCAXAR AI Multi-agent orchestration platform · axar.ai | gone |
| 2015-06-01 | ROSS is an AI-powered legal research platform that can read and… · rossintelligence.com | gone |
| 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 |
| 2020-06-01 | AI.Fashion is the AI creative suite for the fashion industry. · ai.fashion | gone |
| 2017-01-01 | Bicycle AI provides customer support as a service. We work on top of… · bicycleai.com | gone |
| 2023-06-01 | YCAtla The improvement engine for AI agents · atla-ai.com | 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 |
| 2022-01-01 | YCFlike Flike's AI crafts sales emails that convert · flike.app | gone |
| 2021-06-01 | Never code alone. · squire.ai | gone |
| 2015-06-01 | YCVOIQ Conversational AI VoiceBots for Business · voiq.com | gone |
| 2020-06-01 | YCPayflow AI FP&A Agent for insights, reports, planning and forecasting. · payflow.ai | gone |
| 2020-06-01 | Create stunning product images and short-form promotional videos 10x… · unfaze.ai | gone |
| 2022-01-01 | YCPloomber Heroku for AI · ploomber.io | gone |
| 2019-01-01 | AI driven professional engineering firm · traverse.ai | gone |
| 2019-01-01 | We make $1,000 Amazon Go stores. · maitian.ai | gone |
| 2022-06-01 | Claim solar incentives with AI · jasmine.energy | gone |
| 2022-06-01 | No-code data curation for LLM fine-tuning and evaluation. · airtrain.ai | gone |
| 2021-06-01 | Building Gong.io for offline retail. · outloud.ai | gone |
| 2022-01-01 | YCCoffeeAI Instant, hyper-personalized, AI-powered outreach messages · get-coffee.ai | gone |
| 2023-01-01 | YCLynx AI platform for investigating and resolving engineering incidents · uselynx.ai | gone |
| 2022-01-01 | YCCriya AI that builds GTM assets in seconds · criya.co | gone |
| 2021-06-01 | Mobile app for CPG brands to connect to millions of stores globally · milkyway.ai | gone |
| 2023-06-01 | Aide is an AI-native , privacy-first IDE built on top of VSCode · aide.dev | gone |
| 2022-06-01 | API for Retrieval Augmented Generation · superpowered.ai | gone |
| 2022-01-01 | YCFinnt AI Agents for CFO and Finance teams · finnt.com | gone |
| 2024-06-01 | We automate the person taking orders at drive-thrus with a voice AI · drive-thru.ai | gone |
| 2024-06-01 | YCcamfer Building the world’s first AI mechanical engineer. · camfer.dev | gone |
| 2023-01-01 | AI-native operating system for analytics teams · turntable.so | gone |
| 2025-09-01 | YCRovr AI FDE Engine that runs your engineering workflows · withrovr.com | gone |
| 2023-06-01 | AI Overview Search, as a Service · branch-ai.com | gone |
| 2023-01-01 | YCSecond AI-Native Enterprise Codebase Maintenance · second.dev | gone |
| 2023-01-01 | AI-powered customer support automation for fast-growing companies · opensight.ai | gone |
| 2022-06-01 | YCStellar AI-powered business goals · stellarapp.io | gone |
| 2022-06-01 | AI Sales Rep for Website Intent Signals · penguinai.app | gone |
| 2022-06-01 | YCDialect AI copilot for forms, questionnaires & RFX · usedialect.com | gone |
| 2021-01-01 | YCCodeball AI-Powered Code Review · codeball.ai | gone |
| 2018-06-01 | Distributed AI for Industrial Process Monitoring and Optimization. · numericcal.com | gone |
| 2023-01-01 | YCStruct Multi-lingual AI Voice Agents · struct.app | gone |
| 2020-01-01 | YCArdis AI Transform your text data into a searchable knowledge graph · ardis.ai | gone |
| 2024-01-01 | YCLantern Postgres vector database extension to build AI applications · lantern.dev | gone |
| 2022-01-01 | YCUberduck Fast, professional content creation with AI audio, image, and video. · uberduck.ai | gone |
| 2023-01-01 | Helps Developers build stunning UI Lightning Fast ⚡️ · codeparrot.ai | gone |
| 2023-01-01 | YCFabius AI to improve Sales Calls · fabius.io | gone |
| 2023-06-01 | AI Energy Management · trycardinal.ai | gone |
| 2021-06-01 | YCPatterns Next-Gen Financial Analysis and Reporting with AI Agents · patterns.app | gone |
| 2021-06-01 | Sales AI that helps revenue teams move faster and close more deals. · firstquadrant.ai | gone |
| 2023-06-01 | YCVango AI Development platform that makes it 10x easier to improve visual models · vango.ai | gone |
| 2026-01-01 | YCMendral AI DevOps Engineer · mendral.com | gone |
| 2024-01-01 | Your team’s AI powered communication tool · atpatchwork.com | gone |
| 2024-01-01 | YCGlimmer AI search for massive PDFs · withglimmer.com | gone |
| 2024-01-01 | YCToolify Build internal tools with AI · toolify.sh | gone |
| 2024-01-01 | Give Salesforce the AI upgrade it deserves · crmcopilot.co | gone |
| 2024-01-01 | YCAedilic Open-Source AI-generated image/deepfake detection · nonescape.com | gone |
| 2023-01-01 | AI assistant for customer support · growparabolic.com | gone |
| 2023-01-01 | AI Powered Product Discovery · rubberduckylabs.io | gone |
| 2024-01-01 | The world's best presentation editor, powered by AI. · thorntale.com | gone |
| 2024-09-01 | AI Co-Pilot for Design · supercontrast.com | 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.