You asked about Team Collaboration
Nobody in the register described anything this way.
| Launched | What it was | Today |
|---|---|---|
| 2019-01-01 | YCCocoon Bring your most important groups closer together · cocoon.com | acquired |
| 2021-01-01 | A faster and more collaborative alternative to Jira for remote teams · kitemaker.co | acquired |
| 2015-01-01 | YCWorkLife WorkLife is a SaaS application that helps teams have more effective… · worklife.com | acquired |
| 2013-01-01 | Collaborative Screen Sharing — you each get your own mouse, and… · screenhero.com | acquired |
| 2017-01-01 | YCUpKeep Mobile-first software for maintenance teams. · upkeep.com | acquired |
| 2015-01-01 | YCBonfire Bonfire is reimagining RFPs & bidding for gov procurement teams · gobonfire.com | acquired |
| 2013-06-01 | Legal Operations for corporate legal teams. · simplelegal.com | acquired |
| 2015-06-01 | YCGigster Build and manage distributed teams · gigster.com | acquired |
| 2012-01-01 | YCSwiftype Smart search for the modern team. · swiftype.com | acquired |
| 2013-06-01 | Apptimize lets mobile teams innovate faster to create an amazing user… · apptimize.com | acquired |
| 2015-06-01 | YCEden Workplace software for people-centric companies. · edenworkplace.com | acquired |
| 2010-06-01 | YCAeroFS Secure Enterprise Collaboration. · aerofs.com | acquired |
| 2014-06-01 | YCImpraise Enable managers to create an effective work environment for their team · impraise.com | acquired |
| 2018-01-01 | YCYouTeam We make it easy for startups to hire engineers. · youteam.io | acquired |
| 2020-01-01 | Data observability for modern data teams · metaplane.dev | acquired |
| 2020-01-01 | YCNextmv A DecisionOps platform that accelerates optimization AI teams · nextmv.io | acquired |
| 2022-01-01 | YCQuan End-to-end platform to improve wellbeing and team performance. · quanwellbeing.com | acquired |
| 2019-06-01 | YCPopSQL SQL editor for teams · popsql.com | acquired |
| 2020-06-01 | We help ML teams improve their models by improving their datasets · aquariumlearning.com | acquired |
| 2016-06-01 | YCSymple Last mile logistics for delivery & service teams. We bring real-time… · getsymple.com | acquired |
| 2018-01-01 | CodeStream is a Developer Collaboration Platform designed to… · codestream.com | acquired |
| 2018-01-01 | Causal Analytics for Growth Teams · clearbrain.com | acquired |
| 2020-01-01 | Your team's intelligent start page. · dashworks.ai | acquired |
| 2021-01-01 | YCPingPong Video messaging app for remote teams. · getpingpong.com | acquired |
| 2020-06-01 | YCBrevy Empower your customer service team through AI & automation. · brevy.com | acquired |
| 2021-01-01 | YCAvenue Observability platform for operations teams · avenue.app | acquired |
| 2019-06-01 | YCKraftful Copilot for product teams · kraftful.com | acquired |
| 2021-06-01 | YCSatsuma Reliable blockchain indexing & querying for web3 engineering teams. · satsuma.xyz | acquired |
| 2020-01-01 | YCFlowdash Quickly build internal tools for your ops team's manual workflows · flowdash.com | acquired |
| 2023-01-01 | YCBrewit Conversational data analytics for every team · brewit.ai | acquired |
| 2022-06-01 | YCUpLink Document Collection Software for Accountants, Auditors, and Lawyers · uplinkapp.io | acquired |
| 2019-06-01 | Collaborative data noteboook for business teams · intersectlabs.io | acquired |
| 2020-06-01 | YCSameplan Customer-facing plans for sales teams and their prospects. · sameplan.com | acquired |
| 2020-01-01 | YCCron Next-generation calendar for professionals and teams · cron.com | acquired |
| 2024-01-01 | YCLumetric The AI Analyst For Deal Teams · lumetric.ai | acquired |
| 2017-06-01 | Automated meeting scheduling for teams · meetingbird.com | acquired |
| 2013-01-01 | YCMeldium Simple password & identity management for teams. Acquired by LogMeIn… · meldium.com | acquired |
| 2021-01-01 | The network where sales teams connect to share customer introductions. · partnered.com | acquired |
| 2012-01-01 | YCHackPad A realtime wiki for getting things done. · hackpad.com | acquired |
| 2016-06-01 | Automated deployments for software teams. · opsolutely.com | acquired |
| 2018-01-01 | YCHunter2 Hunter2 trains engineering teams in application security through… · hunter2.com | acquired |
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.