You asked about Satellites
26 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 |
| 2024-06-01 | Data centers in space · starcloud.com | still up |
| 2025-01-01 | Reusable Satellites · reditus.space | still up |
| 2020-01-01 | YCFarcast We build advanced satcom user terminals · farcast.com | still up |
| 2021-01-01 | We make satellites to image everywhere on Earth, every 15 minutes · albaorbital.com | still up |
| 2022-01-01 | We Mine Asteroids · astroforge.io | still up |
| 2023-01-21 | app.skyfi.com | still up |
| 2025-09-01 | The Modular Interceptor Platform · wardstone.us | still up |
| 2023-06-01 | Tracking methane emissions with satellites · orbio.earth | still up |
| 2017-06-01 | Tesseract builds better thrusters for modern satellites · tesseract.space | still up |
| 2023-01-01 | YCRadical Building persistent, high-performance infrastructure in the sky · radicalaero.com | still up |
| 2024-01-01 | YCBasalt Constellations as a Service · basalt.space | 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 |
| 2025-09-01 | Powering tomorrow's industrial revolution in space · zephyrfusion.com | still up |
| 2015-01-01 | Launch small satellites · bagaveev.com | gone |
| 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
Y Combinator reports its own outcomes, including acquisitions. The other two are judged by asking the domain, so they are not measured the same way and are never averaged together.
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.