You asked about Satellites
25 people built something like it. 1 is gone.
That is 4% of the ones whose fate we could settle, against 23% across the whole register.
| Launched | What it was | Today |
|---|---|---|
| 2016-01-01 | YCAstranis Advanced satellites for high orbits. · astranis.com | still up |
| 2021-01-01 | Seamless mobility to, through, and from space. It starts with 100%… · stokespace.com | still up |
| 2022-06-01 | YCQuindar Datadog for Space · quindar.space | still up |
| 2021-01-01 | YCAlbedo Full-stack VLEO satellite missions · albedo.com | still up |
| 2022-01-01 | Bluetooth to Space · hubble.com | still up |
| 2022-06-01 | We're building satellites to create a real-time 3D map of the world. · arraylabs.io | still up |
| 2022-01-01 | YCWyvern High-res hyperspectral pictures of Earth from space · wyvern.space | still up |
| 2021-06-01 | Moving Things Around in Space, Imaging Space Objects When We're Not · turionspace.com | still up |
| 2019-06-01 | Last-mile delivery for satellites. · epic-aerospace.com | still up |
| 2025-01-01 | Reusable Satellites · reditus.space | still up |
| 2024-06-01 | Data centers in space · starcloud.com | still up |
| 2020-01-01 | YCFarcast We build advanced satcom user terminals · farcast.com | still up |
| 2022-01-01 | We Mine Asteroids · astroforge.io | still up |
| 2021-01-01 | We make satellites to image everywhere on Earth, every 15 minutes · albaorbital.com | still up |
| 2025-09-01 | The Modular Interceptor Platform · wardstone.us | still up |
| 2017-06-01 | Tesseract builds better thrusters for modern satellites · tesseract.space | still up |
| 2024-01-01 | YCBasalt Constellations as a Service · basalt.space | still up |
| 2023-06-01 | Tracking methane emissions with satellites · orbio.earth | still up |
| 2023-01-01 | YCRadical Building persistent, high-performance infrastructure in the sky · radicalaero.com | still up |
| 2024-01-01 | YCElodin Unified flight software and hardware for the mission of tomorrow · elodin.systems | still up |
| 2026-09-01 | AI spacecraft operators that lives onboard the vehicle · orcaaerospace.com | still up |
| 2015-01-01 | Launch small satellites · bagaveev.com | gone |
| 2025-09-01 | Powering tomorrow's industrial revolution in space · zephyrfusion.com | still up |
| 2021-01-01 | The highest-accuracy global weather data from low-cost flat satellites · careweather.com | still up |
| 2026-06-01 | YCExosat Building a neutral, sovereign alternative to Starlink · exosat.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.