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Backyardspaceprogram alternatives & similar sites

Backyard Space Program — 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
blackswanspace.com ↗	65 match 2 shared topics	Blackswan Space	en	space-and-astronomy WordPress WooCommerce	robots llmsaihumans	emailphone	none
abbr.space ↗	63 match 2 shared topics	Space Acronyms, Abbreviations, & Terms	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
copernix-initiative.com ↗	62 match 2 shared topics	Copernix – Pioneering a new Copernican revolution in Space Exploration	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
aaryan.space ↗	60 match 2 shared topics	Aaryan Anand – Aaryan's Portfolio	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
miketwo.net ↗	60 match 2 shared topics	Michael Aherne	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
sybillatechnologies.eu ↗	60 match 2 shared topics	Sybilla Technologies – We let you see	European Union en	space-and-astronomy WordPress	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
imperial-eclipse.com ↗	60 match 2 shared topics	Imperial Eclipse	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
adlerka.space ↗	45 match 1 shared topics	Adlerka Space Program	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
backtospace.com ↗	37 match 1 shared topics	Back to Space	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
2space.ventures ↗	36 match 1 shared topics	2 Space Ventures	en	space-and-astronomy Squarespace Magento	robotsllmsaihumans	emailphone	partial · 13
mcgillspace.com ↗	36 match 1 shared topics	McGill Space Group	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
acsp.space ↗	36 match 1 shared topics	Association of Commercial Space Professionals	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
accio.space ↗	36 match 1 shared topics	Accio Space	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
avio.com ↗	36 match 1 shared topics	Avio – Advanced Space Propulsion & Aerospace Solutions	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
acmespacetravel.biz ↗	35 match 1 shared topics	Acme Space Travel, Inc	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
aetos-labs.space ↗	35 match 1 shared topics	Aetos Space Labs \| site	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
3af-spacepropulsion.com ↗	35 match 1 shared topics	Home - 10th EDITION OF THE SPACE PROPULSION CONFERENCE	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.