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Sj21Class alternatives & similar sites

San Juan 21 Class Association — 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 Sailing →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
sj21class.net ↗	85 match 1 shared topics	San Juan 21 Class Association	United States~ en	sailing phpBB	robotsllmsaihumans	emailphone	none
sj21class.org ↗	85 match 1 shared topics	San Juan 21 Class Association	United States~ en	sailing phpBB	robotsllmsaihumans	emailphone	none
j24usa.com ↗	75 match 1 shared topics	J/24 USA Class Association	United States~ en	sailing WordPress	robotsllmsaihumans	emailphone	none
jclassyachts.com ↗	75 match 1 shared topics	Home \| J Class Association	en	sailing	robotsllmsaihumans	emailphone	none
j70class.com ↗	74 match 1 shared topics	J/70 USA – Class Association	United States~ en	sailing WordPress WooCommerce	robotsllmsaihumans	emailphone	none
j109uk.com ↗	73 match 1 shared topics	J/109 UK & Ireland Class Association	en	sailing WordPress	robotsllmsaihumans	emailphone	none
j70australia.org ↗	72 match 1 shared topics	Home - J70 Australia Class Association	en	sailing	robotsllmsaihumans	email phone	none
j80na.com ↗	72 match 1 shared topics	J80 North American – Class Association	Canada~ en	sailing WordPress WooCommerce	robotsllmsaihumans	emailphone	none
49er.org ↗	68 match 1 shared topics	49er & 49erFX Olympic Sailing \| International 49er Class Association	en	sailing WordPress	robotsllmsaihumans	emailphone	partial · 8
siraracing.org ↗	68 match 1 shared topics	SPAR ISLAND RACING ASSOCIATION - Home	en	sailing Weebly	robotsllmsaihumans	emailphone	none
ok-belgium.be ↗	67 match 1 shared topics	OK-Belgium – Belgian OK-Dinghy Association	Belgium en	sailing WordPress	robotsllmsaihumans	emailphone	none
singaporeboating.org ↗	67 match 1 shared topics	Singapore Boating Industry Association - Home	en	sailing	robotsllmsaihumans	emailphone	none
disabledsailingontario.com ↗	66 match 1 shared topics	Home - Disabled Sailing Association of Ontario	en	sailing WordPress WooCommerce	robotsllmsaihumans	emailphone	none
j111class.org ↗	66 match 1 shared topics	J111 Class	en	sailing WordPress	robotsllmsaihumans	emailphone	none
sayra-sailing.com ↗	66 match 1 shared topics	South Atlantic Yacht Racing Association - Home Page	en	sailing	robotsllmsaihumans	emailphone	none
javelinuk.org ↗	65 match 1 shared topics	Javelin Association of Great Britain - Javelin dinghy sailboat	en	sailing Weebly	robotsllmsaihumans	emailphone	none
bombaysailing.com ↗	65 match 1 shared topics	Bombay Sailing Association \| Sailing \| Mandwa Beach, Kolgaon, Maharashtra	en	sailing Wix	robots llmsaihumans	emailphone	none
j88class.org ↗	64 match 1 shared topics	J/88 Class	en	sailing WordPress	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.