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Spacecalcs alternatives & similar sites

Space Calcs — 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
spacelegaltech.eu ↗	68 match 1 shared topics	Space LegalTech \| Home	European Union en	space-and-astronomy	robotsllmsaihumans	emailphone	none
squalicumaerospace.org ↗	68 match 1 shared topics	SqHS Aerospace club	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
2space.ventures ↗	68 match 1 shared topics	2 Space Ventures	en	space-and-astronomy Squarespace Magento	robotsllmsaihumans	emailphone	partial · 13
clearspace.today ↗	68 match 1 shared topics	ClearSpace	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
accio.space ↗	68 match 1 shared topics	Accio Space	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
mcgillspace.com ↗	67 match 1 shared topics	McGill Space Group	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
adlerka.space ↗	67 match 1 shared topics	Adlerka Space Program	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
backtospace.com ↗	67 match 1 shared topics	Back to Space	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
bluecanyontech.com ↗	66 match 1 shared topics	Blue Canyon Technologies » Spacecraft buses, systems and solutions	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	partial · 8
edgeofspace.com.br ↗	66 match 1 shared topics	_EDGE OF SPACE_	Brazil en	space-and-astronomy	robotsllmsaihumans	emailphone	none
thisisspaceware.com ↗	66 match 1 shared topics	This Is Spaceware	en	space-and-astronomy Shopify	robots llmsaihumans	emailphone	none
acmespacetravel.biz ↗	66 match 1 shared topics	Acme Space Travel, Inc	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
advancing.space ↗	66 match 1 shared topics	Advancing for Space	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astroscale.com ↗	66 match 1 shared topics	Astroscale \| Space for Tomorrow	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spli.ai ↗	65 match 1 shared topics	SPLI - Space Licensing Platform	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
afspacemuseum.org ↗	65 match 1 shared topics	Cape Canaveral Space Force Museum	United States~ en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
axelspace.com ↗	65 match 1 shared topics	Axelspace \| Space within Your Reach	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
csewi.org ↗	65 match 1 shared topics	The Space & Astronomy Blog	en	space-and-astronomy WordPress	robots llmsaihumans	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.