You asked about Collaboration
66 people built something like it. 21 are gone.
That is 37% of the ones whose fate we could settle, against 23% across the whole register. 9 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2022-05-17 | claap.io | still up |
| 2022-05-19 | usewerk.com | unverified |
| 2022-04-07 | multiplayer.dev | still up |
| 2018-01-01 | 'Figma/Canva for scientists’ · biorender.com | still up |
| 2022-06-22 | smarkup.com | still up |
| 2022-03-04 | zenkit.com | still up |
| 2022-04-21 | runhighlight.com | gone |
| 2019-06-01 | YCCoLab Human and AI design review for hardware · colabsoftware.com | still up |
| 2022-02-21 | innos.io | unverified |
| 2022-05-12 | frescopad.com | moved |
| 2012-06-01 | Secure Collaboration for Technical Teams · mattermost.com | still up |
| 2022-05-13 | todoboard.ca | moved |
| 2021-08-18 | getsturdy.com | unverified |
| 2021-03-18 | inventhub.io | unverified |
| 2019-01-01 | YCGoLinks Intuitive, easy-to-remember short links - powered by AI. · golinks.io | still up |
| 2018-01-01 | YCReplit Collaborative in-browser IDE · replit.com | still up |
| 2023-06-28 | gitopia.com | still up |
| 2015-06-01 | YCEden Workplace software for people-centric companies. · edenworkplace.com | acquired |
| 2018-01-01 | YCSlite The self-maintaining knowledge base · slite.com | still up |
| 2010-06-01 | YCAeroFS Secure Enterprise Collaboration. · aerofs.com | acquired |
| 2019-01-01 | YCTermius Termius is an SSH client with team collaboration features · termius.com | still up |
| 2021-01-25 | jel.app | gone |
| 2022-09-07 | proto.formation.tools | gone |
| 2022-01-01 | YCVelt SDK for adding an agent and human governance layer to your product · velt.dev | still up |
| 2016-01-01 | YCMio Mio powers seamless communication between workplace chat apps. · m.io | still up |
| 2013-01-01 | YCMedisas Medisas builds workflow & collaboration software for hospitals. · medisas.com | gone |
| 2021-06-01 | YCDailybot Make all team work visible — people and AI agents · dailybot.com | still up |
| 2019-06-01 | YCTandem Tandem is a virtual office for remote and distributed teams. · tandem.chat | gone |
| 2023-01-01 | YCPierre Pierre is a new, opinionated, git platform. · pierre.co | still up |
| 2018-01-01 | CodeStream is a Developer Collaboration Platform designed to… · codestream.com | acquired |
| 2015-01-01 | YCResolve Software to accelerate construction by finding issues in 3D BIM · resolvebim.com | still up |
| 2023-01-01 | YCIcePanel Design and explain complex software architecture. · icepanel.io | still up |
| 2023-02-10 | goodquestion.io | still up |
| 2021-01-01 | YCRoutine AI-native all-in-one workspace for startups · routine.co | still up |
| 2022-01-01 | YCOzone Figma for video · ozone.pro | gone |
| 2021-09-15 | cplusplus.com | still up |
| 2023-01-01 | YCClad Project management software for building infrastructure. · withclad.com | still up |
| 2019-06-01 | YCTaskade One prompt. One app. One living workspace for teams. · taskade.com | still up |
| 2019-06-01 | YCMuddy The multiplayer browser that knows you · feelmuddy.com | gone |
| 2022-06-01 | Inventing the solo CFO. · cashboard.co | still up |
| 2019-01-01 | YCCocoon Bring your most important groups closer together · cocoon.com | acquired |
| 2016-06-01 | YCUbiq Screen-sharing for enterprise conference rooms · goubiq.com | gone |
| 2022-01-01 | Manage & automate customer onboarding and implementation · onboard.io | still up |
| 2020-06-01 | YCDuckly Video chat with real-time collaboration. · duckly.com | gone |
| 2021-01-01 | A faster and more collaborative alternative to Jira for remote teams · kitemaker.co | acquired |
| 2021-12-07 | renote.so | unverified |
| 2021-01-01 | YCClay Figma for 3D design · clay3d.io | gone |
| 2021-06-01 | YCSigmaOS The new home for your internet 🏡 · sigmaos.com | still up |
| 2021-06-01 | YCBeau Workflows for repetitive customer-facing tasks · beau.to | still up |
| 2022-06-01 | YCUpLink Document Collection Software for Accountants, Auditors, and Lawyers · uplinkapp.io | acquired |
| 2012-01-01 | One-click screen sharing with installation-free viewing on all devices · screenleap.com | still up |
| 2020-06-01 | YCRally Rally is Zoom for social events · rally.video | still up |
| 2013-06-01 | YCFloobits Real-time collaborative editing in the browser with support for… · floobits.com | gone |
| 2024-01-01 | Your team’s AI powered communication tool · atpatchwork.com | gone |
| 2023-06-01 | YCAffinity A compliance training platform built for regulated industries. · itsaffinity.com | still up |
| 2023-01-01 | YCSorted Instant SaaS management · sorted-lp.webflow.io | gone |
| 2023-01-01 | YCLinkGrep AI browser copilot for teams · linkgrep.com | still up |
| 2022-01-01 | YCMoots The guest intelligence platform for high-value client events · moots.ai | still up |
| 2019-01-01 | YCHerald A collaborative repository for user feedback. · heraldhq.com | gone |
| 2015-01-01 | YCWorkLife WorkLife is a SaaS application that helps teams have more effective… · worklife.com | acquired |
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.