You asked about Design Tools
Nobody in the register described anything this way.
| Launched | What it was | Today |
|---|---|---|
| 2015-01-01 | YCGitLab A complete DevOps platform delivered as a single application. · gitlab.com | acquired |
| 2010-01-01 | The first all-in-one operating system for marketing · optimizely.com | acquired |
| 2010-06-01 | Real-time visibility into critical apps and services all in one place. · pagerduty.com | acquired |
| 2012-01-01 | YCAuthy Authy is a Two-Factor Authentication platform for developers · authy.com | acquired |
| 2016-01-01 | YCGitPrime Visibility and analytics for software development leaders. · gitprime.com | acquired |
| 2019-06-01 | YCEmbrace Modern user-focused observability built on OpenTelemetry · embrace.io | acquired |
| 2016-06-01 | YCBurrow A design brand creating innovative, award winning furniture. · burrow.com | acquired |
| 2014-01-01 | YCDevCycle Feature Flag Management Built for Developers · devcycle.com | acquired |
| 2011-01-01 | YCMailgun Email API service. · mailgun.net | acquired |
| 2015-06-01 | YCGigster Build and manage distributed teams · gigster.com | acquired |
| 2017-01-01 | YCPlayment Mechanical Turk for enterprises. · playment.io | 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 |
| 2015-01-01 | Paperspace is a cloud platform for building and scaling AI… · paperspace.com | acquired |
| 2018-06-01 | YCBerbix Convert more verified users. Instantly & accurately validate user IDs. · berbix.com | acquired |
| 2020-06-01 | AI-powered user assistance platform · command.ai | acquired |
| 2020-01-01 | Data observability for modern data teams · metaplane.dev | acquired |
| 2023-01-01 | YCFern Instantly offer SDKs and API Docs · buildwithfern.com | acquired |
| 2015-01-01 | YCSigOpt SigOpt is an Optimization-as-a-Service platform that seamlessly tunes… · sigopt.com | acquired |
| 2020-01-01 | YCNextmv A DecisionOps platform that accelerates optimization AI teams · nextmv.io | acquired |
| 2021-01-01 | YCUiflow No-code platform for enterprise software companies · ycombinator.com | acquired |
| 2018-01-01 | YCMojo Mobile app for creating pro-quality social media videos · mojo-app.com | acquired |
| 2022-01-01 | Open-Source Postman alternative · requestly.com | acquired |
| 2023-01-01 | YCLangfuse Open source LLM engineering platform · langfuse.com | acquired |
| 2015-01-01 | YCYhat End-to-end data science lifecycle management platform. · yhat.com | acquired |
| 2019-06-01 | YCPopSQL SQL editor for teams · popsql.com | acquired |
| 2020-06-01 | Humanloop is the LLM evals platform for enterprises. · humanloop.com | acquired |
| 2017-06-01 | YCLyrebird Our tech speaks for itself. · lyrebird.ai | acquired |
| 2014-06-01 | YCCognito Frictionless, modern identity verification that starts with just a… · cognitohq.com | acquired |
| 2014-01-01 | YCWit.ai Natural Language for Developers --Wit is an API that makes it easy… · wit.ai | acquired |
| 2008-01-01 | 280north.com | acquired |
| 2007-06-01 | YCDisqus Add comments to your website. · disqus.com | acquired |
| 2013-06-01 | YCURX Mobile ads that users like. Acquired by Pinterest in May 2016. · urx.com | acquired |
| 2014-01-01 | Create APIs where they don't exist. With kimono you can quickly… · kimonolabs.com | acquired |
| 2011-01-01 | YCUpverter The future of hardware design. A marketplace for hardware engineering… · upverter.com | acquired |
| 2020-06-01 | Driver co-pilot to make trucking more efficient · hypermile.ai | acquired |
| 2011-06-01 | YCParse Parse is the easiest way to build apps. · parse.com | acquired |
| 2007-06-01 | clickpass.com | acquired |
| 2014-01-01 | Simulate clothes on your body. · avametric.com | acquired |
| 2017-06-01 | Code review as a service - combining automation with a network of… · pullrequest.com | acquired |
| 2012-06-01 | YCPixate Mobile application prototyping. Now part of Google. · pixate.com | acquired |
| 2018-01-01 | CodeStream is a Developer Collaboration Platform designed to… · codestream.com | acquired |
| 2020-01-01 | YCWeav Weav is the universal API for commerce platforms · weav.co | acquired |
| 2021-01-01 | Supercharge your mobile apps · emergetools.com | acquired |
| 2021-01-01 | YCunSurvey AI-led market research interviews, no scheduling, instant insights. · unsurvey.ai | acquired |
| 2023-01-01 | The open source, fullstack monitoring platform: stop guessing why… · highlight.io | acquired |
| 2021-01-01 | Build better computer vision models by building better datasets · segments.ai | acquired |
| 2019-06-01 | YCKraftful Copilot for product teams · kraftful.com | acquired |
| 2020-06-01 | YCReflect No-code test automation for web apps · reflect.run | acquired |
| 2015-06-01 | Bringing transparency to the app stores and helping developers build… · sourcedna.com | acquired |
| 2022-06-01 | Turn user feedback to product insights · monterey.ai | acquired |
| 2019-01-01 | YCVisly Build React components visually · visly.app | acquired |
| 2021-01-01 | Open source continuous profiling software to debug performance issues · pyroscope.io | acquired |
| 2018-06-01 | YCOptic Making APIs Developer-friendly · useoptic.com | acquired |
| 2019-01-01 | YCElph Acquired by Brex. Building digital payments infrastructure. · elph.com | acquired |
| 2019-01-01 | No-code Web Apps testing for everyone · preflight.com | acquired |
| 2023-01-01 | YCLume Speed up customer implementation with AI · lume.ai | acquired |
| 2023-06-01 | Open source GenAI development platform · flowiseai.com | acquired |
| 2020-01-01 | YCFlowdash Quickly build internal tools for your ops team's manual workflows · flowdash.com | acquired |
| 2020-06-01 | YCFig Fig adds visual apps, shortcuts, and autocomplete to your terminal. · fig.io | 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.