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Oldrocketplans alternatives & similar sites

Ye Olde Rocket Plans — 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
epflrocketteam.ch ↗	68 match 1 shared topics	Home \| EPFL Rocket Team	Switzerland en	space-and-astronomy	robotsllmsaihumans	emailphone	none
asteriarocketry.com ↗	68 match 1 shared topics	Asteria Rocket Team	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
hybrids.com ↗	66 match 1 shared topics	Hybrid Rockets - eAc	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
ears.org.uk ↗	66 match 1 shared topics	East Anglian Rocketry Society	United Kingdom en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astra.com ↗	65 match 1 shared topics	Astra Rocket 4.0 \| Private Space Launch Company	United States~ en	space-and-astronomy Webflow	robots llmsaihumans	emailphone	none
hyperspacerocketdesigns.com ↗	65 match 1 shared topics	Home \| Hyperspace Rocket Designs and Tea Bar	United States~ en	space-and-astronomy Weebly Square Online	robotsllmsaihumans	emailphone	none
3iatlasapp.com ↗	65 match 1 shared topics	3i Atlas: UAP News, NASA Alerts & Live Rocket Launch Tracker	en	space-and-astronomy	robots llmsaihumans	emailphone	none
minorplanetcenter.net ↗	65 match 1 shared topics	IAU Minor Planet Center	en	space-and-astronomy	robotsllmsaihumans	emailphone	partial · 5
minorplanetcenter.org ↗	65 match 1 shared topics	IAU Minor Planet Center	en	space-and-astronomy	robotsllmsaihumans	emailphone	partial · 5
cirn.ca ↗	64 match 1 shared topics	Canadian Internet Rocketry Network	Canada en	space-and-astronomy	robotsllmsaihumans	emailphone	none
hybridpropulsionforspace.com ↗	64 match 1 shared topics	Hybrid Rocket Propulsion \| HyPrSpace – We dont follow trends. We set trajectories.	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
hypr-space.tech ↗	64 match 1 shared topics	Hybrid Rocket Propulsion \| HyPrSpace – We dont follow trends. We set trajectories.	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
qprl.org ↗	64 match 1 shared topics	Monarch Space Systems \| Technology Beyond Rocketry™	en	space-and-astronomy	robots llmsaihumans	emailphone	none
quantumleaprocketry.com ↗	64 match 1 shared topics	Giant Leap Rocketry: High Power Rocketry supplier of parts and kits – GiantLeapRocketry	en	space-and-astronomy Shopify	robots llmsaihumans	emailphone	none
cascadeastronomy.org ↗	64 match 1 shared topics	Home - Cascade Astronomy & Rocketry Academy	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
centralarkansasrocketry.org ↗	63 match 1 shared topics	Central Arkansas Rocketry – NAR Section #909	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
phobosplan.com ↗	63 match 1 shared topics	The Phobos Plan	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
asimoplan.com ↗	63 match 1 shared topics	Asimoplan - Home	en	space-and-astronomy Weebly	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.