You asked about Team Collaboration
27 people built something like it. 5 are gone.
That is 23% of the ones whose fate we could settle, against 23% across the whole register. 5 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2021-06-01 | YCDailybot Make all team work visible — people and AI agents · dailybot.com | still up |
| 2021-01-01 | A faster and more collaborative alternative to Jira for remote teams · kitemaker.co | acquired |
| 2021-01-01 | YCAbacum The AI-native FP&A platform that helps Finance teams drive business… · abacum.ai | 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 | YCHumaans AI-Powered HRIS for high performing teams · humaans.io | still up |
| 2021-01-01 | YCRunway Easier and more reliable mobile app releases for teams. · runway.team | still up |
| 2021-01-01 | YCSpokn AI-powered video platform for Internal Comms and HR teams · getspokn.com | still up |
| 2021-06-01 | YCEnso Self-Service Data Prep and Blend Built for Data Teams. · ensoanalytics.com | still up |
| 2021-01-01 | ModernLoop helps teams automate and streamline recruiting operations · modernloop.io | still up |
| 2021-06-01 | YCNoloco Flexible Business Apps for Modern Teams · noloco.io | still up |
| 2021-01-01 | YCAvenue Observability platform for operations teams · avenue.app | acquired |
| 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 |
| 2021-01-01 | YCHaystack Delivery Analytics for Software Teams · usehaystack.io | still up |
| 2021-06-01 | YCLightly Help ML teams label the right data · lightly.ai | still up |
| 2021-06-01 | YCBeau Workflows for repetitive customer-facing tasks · beau.to | still up |
| 2021-06-01 | YCSatsuma Reliable blockchain indexing & querying for web3 engineering teams. · satsuma.xyz | acquired |
| 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 | YCMixr Team building through online game tournaments. · mixronline.com | gone |
| 2021-01-01 | PowerRouter helps sales teams with lead routing in Salesforce · powerrouter.io | still up |
| 2021-06-01 | Observability for Data Engineering Teams · lariatdata.com | gone |
| 2021-06-01 | Sales AI that helps revenue teams move faster and close more deals. · firstquadrant.ai | gone |
| 2021-01-01 | YCJetdocs Collaborative ticketing that integrates into Teams and Slack · jetdocs.io | still up |
| 2021-01-01 | The network where sales teams connect to share customer introductions. · partnered.com | acquired |
| 2021-01-01 | YCFable The command center for product teams · tryfable.com | gone |
| 2021-01-01 | YCWaypoint The email API built for product teams · usewaypoint.com | still up |
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.