You asked about Collaboration
Nobody in the register described anything this way.
| Launched | What it was | Today |
|---|---|---|
| 2015-06-01 | YCEden Workplace software for people-centric companies. · edenworkplace.com | acquired |
| 2010-06-01 | YCAeroFS Secure Enterprise Collaboration. · aerofs.com | acquired |
| 2018-01-01 | CodeStream is a Developer Collaboration Platform designed to… · codestream.com | acquired |
| 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 |
| 2022-06-01 | YCUpLink Document Collection Software for Accountants, Auditors, and Lawyers · uplinkapp.io | acquired |
| 2012-01-01 | YCHackPad A realtime wiki for getting things done. · hackpad.com | 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 |
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.