You asked about Productivity
34 people built something like it. 7 are gone.
That is 23% of the ones whose fate we could settle, against 23% across the whole register. 3 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-01-01 | YCFathom The most flexible AI meeting notetaker ever built. · fathom.ai | still up |
| 2021-01-01 | YCTreinta Software and AI tools for SMBs in the US and Latin America · treinta.co | still up |
| 2021-06-01 | YCSully.ai Autonomous team of AI agents that runs the entire hospital operations · sully.ai | still up |
| 2021-01-01 | YCSpline Design and collaborate in multiple dimensions. · spline.design | still up |
| 2021-01-01 | YCFoster A better way to write. · foster.co | still up |
| 2021-06-01 | Meeting agendas, notes, & goals that tie back to your OKRs · hypercontext.com | gone |
| 2021-01-01 | ModernLoop helps teams automate and streamline recruiting operations · modernloop.io | still up |
| 2021-01-01 | YCWaydev Engineering intelligence for AI transformation · waydev.co | still up |
| 2021-06-01 | YCJestor Saving OPS from SLOPS. Jestor builds internal systems that last. · jestor.com | still up |
| 2021-06-01 | YCDailybot Make all team work visible — people and AI agents · dailybot.com | still up |
| 2021-01-01 | Slash commands anywhere · blaze.today | still up |
| 2021-01-01 | YCPingPong Video messaging app for remote teams. · getpingpong.com | acquired |
| 2021-06-01 | Accelerate software development with WarpBuild's 10x faster CI infra. · warpbuild.com | still up |
| 2021-01-01 | YCRoutine AI-native all-in-one workspace for startups · routine.co | still up |
| 2021-01-01 | YCFlowEQ No-code workflow tool · floweq.com | still up |
| 2021-01-01 | Cut your writing time by 40% with AI-powered autocomplete · compose.ai | still up |
| 2021-06-01 | YCMindmesh Mindmesh is the virtual desk that puts you in control. · mindmesh.com | gone |
| 2021-06-01 | Virtual Co-working Community · flow.club | still up |
| 2021-06-01 | YCAviator Google-level engineering productivity suite · aviator.co | still up |
| 2021-06-01 | Project management on a live map · matidor.com | still up |
| 2021-06-01 | YCStardex AI native ATS + CRM for executive search firms · stardex.com | still up |
| 2021-01-01 | YCAerotime Calendar that kills time fragmentation · aerotime.com | gone |
| 2021-06-01 | YCBeau Workflows for repetitive customer-facing tasks · beau.to | still up |
| 2021-01-01 | A faster and more collaborative alternative to Jira for remote teams · kitemaker.co | acquired |
| 2021-06-01 | YCHilos Close and activate your customers on WhatsApp · hilos.io | acquired |
| 2021-06-01 | YCSigmaOS The new home for your internet 🏡 · sigmaos.com | still up |
| 2021-01-01 | YCClay Figma for 3D design · clay3d.io | gone |
| 2021-06-01 | AI that solves email overwhelm. Not another mail app. · foragemail.com | gone |
| 2021-01-01 | YCFifthTry Continuous Documentation To End Documentation Rot · fifthtry.com | still up |
| 2021-01-01 | Chrome extension to turn clicks & keystrokes into no-code automations · trysmartcuts.com | still up |
| 2021-06-01 | Payments and scheduling for services professionals in LATAM · encuadrado.com | still up |
| 2021-06-01 | YCHera Calendar app to prepare, join and follow-up on virtual meetings · hera.so | gone |
| 2021-06-01 | YCBirdie Connect LinkedIn to your CRM to automate and track LinkedIn outreach. · getbirdie.io | still up |
| 2021-01-01 | YCFable The command center for product teams · tryfable.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.