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NASA Space Apps Challenge — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Space And Astronomy →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
spaceappschallenge.org ↗	100 match 2 shared topics	NASA Space Apps Challenge	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceappsseattle.org ↗	65 match 2 shared topics	Space Apps Seattle – A global NASA hackathon in the city that unites tech and space: Seattle, WA	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
helixastro.com ↗	64 match 2 shared topics	Helix Astro LLC — Space Domain Awareness, Reimagined	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
apeirion.space ↗	64 match 2 shared topics	APEIRION — Innovating the Future of Space Exploration	en	space-and-astronomy	robotsllmsaihumans	emailphone	partial · 8
abbr.space ↗	64 match 2 shared topics	Space Acronyms, Abbreviations, & Terms	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
avrtec.space ↗	63 match 2 shared topics	AVRTEC AB — Compact Space Electronics for PocketQube and Small-Satellite Systems	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceoneers.io ↗	62 match 2 shared topics	Spaceoneers.io – Enabling a new generation of space pioneers	en	space-and-astronomy WooCommerce	robotsllmsaihumans	emailphone	none
vyomsat.com ↗	62 match 2 shared topics	VyomSat - Democratizing Small Satellite STEM Education	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
sybillatechnologies.eu ↗	61 match 2 shared topics	Sybilla Technologies – We let you see	European Union en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
ctrlaltreset.dev ↗	61 match 2 shared topics	Home \| ctrl+alt+reset	en	space-and-astronomy Prismic	robotsllmsaihumans	emailphone	none
3rdplanetorbital.com ↗	60 match 2 shared topics	Reliable and Trustworthy Building Blocks 🌍 Third Planet Orbital	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
aaryan.space ↗	60 match 2 shared topics	Aaryan Anand – Aaryan's Portfolio	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
cubesat.org ↗	60 match 2 shared topics	CubeSat	en	space-and-astronomy Squarespace	robotsllmsaihumans	emailphone	none
leeholmes.com ↗	60 match 2 shared topics	Lee Holmes \| Precision Computing	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
aperturex.earth ↗	51 match 1 shared topics	APERTURE - NASA Space Apps Challenge 2025	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceappsyonkers.org ↗	46 match 1 shared topics	NASA Space Apps Yonkers	en	space-and-astronomy Drupal	robotsllmsaihumans	emailphone	none
spaceroboticistchallenge.com ↗	45 match 1 shared topics	NASA Space Roboticist Challenge	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceapps.am ↗	42 match 1 shared topics	SpaceApps Challenge 2018 :: Armenia	en	space-and-astronomy	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.