You asked about 3D Printing
27 people built something like it. 7 are gone.
That is 30% of the ones whose fate we could settle, against 23% across the whole register. 4 were acquired.
| Launched | What it was | Today |
|---|---|---|
| 2016-01-01 | Building humanity’s multiplanetary future. · relativityspace.com | still up |
| 2018-01-01 | 3D printing beautiful, high-quality, and sustainable homes. · mightybuildings.com | gone |
| 2017-01-01 | YCAON3D Additive Manufacturing with advanced materials · aon3d.com | still up |
| 2018-01-01 | YCArchForm Replacing orthodontic braces with our clear aligner and software · archform.com | still up |
| 2017-01-01 | AWS for manufacturing. · voodoomfg.com | gone |
| 2020-06-01 | Absorbable wrap for blood vessels · venostent.com | still up |
| 2025-06-01 | Physics-based foundation models for CAD optimization. · topological.com | still up |
| 2014-01-01 | Functional 3D printing materials. · madesolid.com | gone |
| 2013-06-01 | Acquired by MakerBot in February 2014.
A marketplace for 3D… · layerbylayer.com | acquired |
| 2012-06-01 | Simple 3d modeling software for 3d printers. · dreamforge.me | gone |
| 2026-09-01 | YCSinter Accelerating scaled plastics with additive technologies · sinter.systems | still up |
| 2012-01-01 | Turn physical objects and environments into 3D models in seconds. · matterport.com | acquired |
| 2022-06-01 | We're building satellites to create a real-time 3D map of the world. · arraylabs.io | still up |
| 2020-06-01 | Combining 3D cell culture & AI to translate drugs to clinical success · knownmed.com | acquired |
| 2024-01-01 | YCDraftaid Go from 3D models to CAD drawings using AI · draftaid.io | still up |
| 2015-01-01 | YCResolve Software to accelerate construction by finding issues in 3D BIM · resolvebim.com | still up |
| 2018-01-01 | Lucy’s mission is to reduce tobacco-related harm to zero. We provide… · lucy.co | still up |
| 2015-06-01 | ShapeScale is a personal 3D scanner and fitness tracker that… · shapescale.com | still up |
| 2021-01-01 | YCClay Figma for 3D design · clay3d.io | gone |
| 2021-01-01 | YCTrue3D Building the next generation of visual media · true3d.com | still up |
| 2023-06-01 | YCsizeless Instant 3D Digital Twins for Smarter Real Estate. · sizeless.co | still up |
| 2023-01-01 | YCDream3D We build tools to help humanity predict the future. · dream3d.com | still up |
| 2015-06-01 | Patient-derived 3D tissue reconstruction models for preclinical… · zpredicta.com | acquired |
| 2022-01-01 | YCLifecast Software to create 3D video for VR, robotics and film. · lifecastvr.com | gone |
| 2024-06-01 | ideate.xyz is an AI-powered 3D art suite on the web · ideate.xyz | still up |
| 2015-01-01 | YC3dot 3dot.com | gone |
| 2024-06-01 | Transform Images And Videos Into Immersive 3D With AI · digitalcarbon.ai | 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.