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Portablefrontier alternatives & similar sites

PortableFrontier – Space exploration in your pocket — 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
moonhumans.com ↗	72 match 1 shared topics	MoonHumans - Lunar Exploration & Space News	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceexploration.org.cy ↗	70 match 1 shared topics	Cyprus Space Exploration Organisation - Space & Astronomy in Cyprus	Cyprus en	space-and-astronomy	robotsllmsaihumans	emailphone	none
moonwinvip.com ↗	69 match 1 shared topics	Moonwin - Discover the Universe with Moonwin: Your Ultimate Space Exploration Hub	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
vleo.com ↗	68 match 1 shared topics	VLEO - The Next Frontier in Space	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
lunr.co ↗	68 match 1 shared topics	LUNR - Space News, Exploration, Technology & Business	Colombia en	space-and-astronomy	robotsllmsaihumans	emailphone	none
hightechuniversal.com ↗	68 match 1 shared topics	HighTech Universal: Innovating the Future of Space Exploration, Technology, and Global Solutions	en	space-and-astronomy	robotsllmsaihumans	email phone	none
developspaceafrica.org ↗	67 match 1 shared topics	Foundation for Space Development Africa	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
developspacesa.org ↗	67 match 1 shared topics	Foundation for Space Development Africa	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
axelspace.com ↗	67 match 1 shared topics	Axelspace \| Space within Your Reach	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
cosmicspinpro.com ↗	66 match 1 shared topics	Cosmic Spin Pro: Exploring Astrophysics and Space Discoveries	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
ovita.org ↗	66 match 1 shared topics	Ovita Space Agency	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
moonlode.com ↗	66 match 1 shared topics	Moonlode – Spacecraft Thermal Solutions	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
outerspacetechnologies.net ↗	66 match 1 shared topics	Outer Space Technologies	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
condosinspace.com ↗	66 match 1 shared topics	Condos In Space \| Luxury Living Beyond Earth and more	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
3af-spacepropulsion.com ↗	65 match 1 shared topics	Home - 10th EDITION OF THE SPACE PROPULSION CONFERENCE	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
bavarianilluminati.com ↗	65 match 1 shared topics	Bavarian Illuminati - World Domination in Our Lifetime!	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
outerspacetreaty.org ↗	65 match 1 shared topics	Outer Space Treaty	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
avio.com ↗	65 match 1 shared topics	Avio – Advanced Space Propulsion & Aerospace Solutions	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.