You asked about Collaboration
56 people built something like it. 18 are gone.
That is 38% of the ones whose fate we could settle, against 23% across the whole register. 9 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2018-01-01 | 'Figma/Canva for scientists’ · biorender.com | still up |
| 2019-06-01 | YCCoLab Human and AI design review for hardware · colabsoftware.com | still up |
| 2012-06-01 | Secure Collaboration for Technical Teams · mattermost.com | still up |
| 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 |
| 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 |
| 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 |
| 2021-06-01 | YCDailybot Make all team work visible — people and AI agents · dailybot.com | still up |
| 2013-01-01 | YCMedisas Medisas builds workflow & collaboration software for hospitals. · medisas.com | gone |
| 2018-01-01 | CodeStream is a Developer Collaboration Platform designed to… · codestream.com | acquired |
| 2023-01-01 | YCPierre Pierre is a new, opinionated, git platform. · pierre.co | still up |
| 2019-06-01 | YCTandem Tandem is a virtual office for remote and distributed teams. · tandem.chat | gone |
| 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 |
| 2022-01-01 | YCOzone Figma for video · ozone.pro | gone |
| 2021-01-01 | YCRoutine AI-native all-in-one workspace for startups · routine.co | still up |
| 2023-01-01 | YCClad Project management software for building infrastructure. · withclad.com | still up |
| 2019-06-01 | YCMuddy The multiplayer browser that knows you · feelmuddy.com | gone |
| 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 |
| 2019-06-01 | YCTaskade One prompt. One app. One living workspace for teams. · taskade.com | still up |
| 2022-01-01 | Manage & automate customer onboarding and implementation · onboard.io | still up |
| 2022-06-01 | Inventing the solo CFO. · cashboard.co | still up |
| 2021-01-01 | A faster and more collaborative alternative to Jira for remote teams · kitemaker.co | acquired |
| 2021-06-01 | YCBeau Workflows for repetitive customer-facing tasks · beau.to | still up |
| 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 |
| 2020-06-01 | YCDuckly Video chat with real-time collaboration. · duckly.com | gone |
| 2012-01-01 | One-click screen sharing with installation-free viewing on all devices · screenleap.com | still up |
| 2022-06-01 | YCUpLink Document Collection Software for Accountants, Auditors, and Lawyers · uplinkapp.io | acquired |
| 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 |
| 2019-01-01 | YCHerald A collaborative repository for user feedback. · heraldhq.com | gone |
| 2013-01-01 | Collaborative Screen Sharing — you each get your own mouse, and… · screenhero.com | acquired |
| 2011-01-01 | YCSiasto Siasto is a collaboration tool designed for SMBs who use Google Apps,… · siasto.com | gone |
| 2024-01-01 | Your team’s AI powered communication tool · atpatchwork.com | gone |
| 2006-06-01 | YCJamglue jamglue.com | gone |
| 2012-01-01 | YCHackPad A realtime wiki for getting things done. · hackpad.com | acquired |
| 2023-01-01 | YCLinkGrep AI browser copilot for teams · linkgrep.com | still up |
| 2023-01-01 | YCSorted Instant SaaS management · sorted-lp.webflow.io | gone |
| 2023-06-01 | YCAffinity A compliance training platform built for regulated industries. · itsaffinity.com | still up |
| 2015-01-01 | YCWorkLife WorkLife is a SaaS application that helps teams have more effective… · worklife.com | acquired |
| 2022-01-01 | YCMoots The guest intelligence platform for high-value client events · moots.ai | still up |
| 2025-01-01 | YCG LNK Simplifying Collaboration for Healthcare Organizations & Professionals · glnkco.com | still up |
| 2025-01-01 | YCOlive Build internal tools with AI · fromolive.com | still up |
| 2024-06-01 | YCOrgOrg Organizational productivity suite for companies · orgorg.com | still up |
| 2011-06-01 | YCDraft Making Draft. Super simple version control and collaboration for… · draftin.com | gone |
| 2024-01-01 | Gives non-technical team members agents that work right out of the box · usesolari.ai | still up |
| 2014-01-01 | Virtual activities for remote teams · merrymint.co | gone |
| 2012-01-01 | Github for designers. We automatically keep track of revisions of… · pixelapse.com | gone |
| 2019-01-01 | YCBlitzIQ Note taking workspace for B2B sales teams · blitziq.com | gone |
| 2018-01-01 | YCHaiku Collaboration tools for software companies · haikuforteams.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.