You asked about Productivity
35 people built something like it. 7 are gone.
That is 22% 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 |
| 2021-06-10 | language.work | moved |
| 2021-01-01 | YCSpline Design and collaborate in multiple dimensions. · spline.design | still up |
| 2021-04-09 | deprocrastination.co | unverified |
| 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 | YCFoster A better way to write. · foster.co | still up |
| 2021-09-16 | taskablehq.com | moved |
| 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 |
| 2021-01-01 | YCRoutine AI-native all-in-one workspace for startups · routine.co | still up |
| 2021-06-01 | Accelerate software development with WarpBuild's 10x faster CI infra. · warpbuild.com | still up |
| 2021-01-01 | YCFlowEQ No-code workflow tool · floweq.com | still up |
| 2021-06-01 | YCMindmesh Mindmesh is the virtual desk that puts you in control. · mindmesh.com | gone |
| 2021-01-01 | Cut your writing time by 40% with AI-powered autocomplete · compose.ai | still up |
| 2021-06-01 | YCAviator Google-level engineering productivity suite · aviator.co | still up |
| 2021-06-01 | Virtual Co-working Community · flow.club | still up |
| 2021-04-13 | vvv.space | unverified |
| 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 |
| 2021-11-15 | pomoplanner.app | still up |
| 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 |
| 2021-06-01 | YCHera Calendar app to prepare, join and follow-up on virtual meetings · hera.so | gone |
| 2021-06-01 | Payments and scheduling for services professionals in LATAM · encuadrado.com | still up |
| 2021-01-01 | Chrome extension to turn clicks & keystrokes into no-code automations · trysmartcuts.com | still up |
| 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
Y Combinator reports its own outcomes, including acquisitions. The other two are judged by asking the domain, so they are not measured the same way and are never averaged together.
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.