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Cosmodiff alternatives & similar sites

COSMODiff’ — 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
deep-space-astronomy.com ↗	60 match 1 shared topics	Deep Space Astronomy \| Magasin de matériel d’astronomie Suisse	fr	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	partial · 4
deepsky-drawings.com ↗	60 match 1 shared topics	» Dessins du ciel profond extrême	fr	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
7astro.org ↗	60 match 1 shared topics	7Astro : astronomie en cévennes	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
a3c.org ↗	60 match 1 shared topics	Astronomie des 3 cols – Club A3C, le club des amateurs d'astronomie de la Vallée Verte et alentours.	fr	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
aacstars.org ↗	60 match 1 shared topics	The Amarillo Astronomy Club - Télescopes pour débutants	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
barnettslascrucesharleydavidson.com ↗	60 match 1 shared topics	星空官方端网站在线登入-星空(中国)	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
dinastro.org ↗	60 match 1 shared topics	Dinastro - Obervatoire de Viker - Biscarmiau	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
echosilencieux.net ↗	60 match 1 shared topics	Écho Silencieux – Les vérités cachées derrière les théories qui font trembler le monde	fr	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
vanhaecke.dev ↗	60 match 1 shared topics	Xavier Vanhaecke - Consultant R&D	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
alienrocks.be ↗	60 match 1 shared topics	ALIENROCKS	BE fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
123etoiles.com ↗	60 match 1 shared topics	Les stages 1, 2, 3 étoiles ! \| Association Française d'Astronomie	FR~ fr	space-and-astronomy Magento	robotsllmsaihumans	emailphone	none
2berich.com ↗	60 match 1 shared topics	2BeRich : WE CHOOSE TO GO TO THE MOON	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
absolut-system.com ↗	60 match 1 shared topics	Accueil - Absolut System	fr	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
academieairespace.com ↗	60 match 1 shared topics	Accueil 2025 \| AAE	fr	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	partial · 12
achatlaser.com ↗	60 match 1 shared topics	Achat pointeur laser \| Vente pointeurs lazer powerpoint	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
action-qualite.com ↗	60 match 1 shared topics	Action Qualite \| Inspections on EEE components	fr	space-and-astronomy Wix	robots llmsaihumans	emailphone	none
caudroit.com ↗	60 match 1 shared topics	Margaret Hamilton - Apollo 11	fr	space-and-astronomy	robotsllmsaihumans	emailphone	none
destinationeclipses.com ↗	60 match 1 shared topics	Informations sur les prochaines éclipses de Lune et Soleil	fr	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.